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Электронный компонент: S1D2511C01

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DEFLECTION PROCESSOR FOR MULTISYNC MONITORS S1D2511B01
1
DEFLECTION PROCESSOR
The S1D2511B01 is a monolithc integrated circuit
assembled in 32 pins shrunk dual in line plastic pack-
age. This IC controls all the functions related to the hori-
zontal and vertical deflection in multimodes or multi-
frequency computer display monitors.
The internal sync processor, combined with the very
powerful geometry correction block make the S1D2511B
suitable for very high performance monitors with very
few external components. The horizontal jitter level is
very low. It is particularly well suited for high-end 15
"
and 17
"
monitors.
FUNCTIONS
Defiection Processor
I
2
C BUS Control
B+ Regulator
Vertical Parabola Generator
Horizontal and Vertical dynamic focus
FEATURES
(HORIZONTAL)
Self-adaptative
Dual PLL concept
150kHz maximum frequency
X-RAY protection input
I
2
C controls : Horizontal duty-cycle, H-position,free running
frequency, frequency generator for burn-in mode.
(VERTICAL)
Vertical ramp generator
50 to 165Hz AGC loop
Geometry tracking with V-POS & AMP
I
2
C Controls :
V-AMP, V-POS, S-CORR, C-CORR
(I
2
C GEOMETRY CORRECTIONS)
Vertical parabola generator
(Pincushion-E/W, Keystone)
Horizontal Dynamic Phase
(Side Pin balance & parallelogram)
Horizontal and vertical dynamic focus
(Horizontal Focus Amplitude, Horizontal
Focus Symmetry, Vertical Focus Amplitude)
(GENERAL)
Sync Processor
12V supply voltage
Hor. & Vert, lock/unlock outputs
Read/Write I
2
C interface
Vertical moire
B+ Regulator
-Internal PWM generator for B+ current mode
step-up converter.
- Switchable to step-down converter
- I
2
C adjustable B+ reference voltage
- Output pulses synchronized on horizontal
frequency
- Internal maximum current limitation.
ORDERING INFORMATION
Device
Package
Operating Temperature
S1D2511B01-A0B0
32-SDIP
0
C -- 70
C
32-SDIP-400
S1D2511B01 DEFLECTION PROCESSOR FOR MULTISYNC MONITORS
2
BLOCK DIAGRAM
19
16
15
28
14
9
PHASE/
FREQUENCY
COMPARATOR
H-PHASE(7 bits)
LOCK/UNLOCK
IDENTIFICATION
PHASE
COMPARATOR
VCO
SAFETY
PROCESSOR
PHASE
SHIFTER
H-DUTY
(5 bits)
7
3
8
5
6
12
4
B+
CONTROLLER
10
I C INTERFACE
GEOMETRY
TRACKING
22
20
23
VACCAP
COMP
PLL1F
HLOCKOUT
R0
C0
HFLY
PLL2C
HOUT
VOUT
V
REF
Forced
Freq.
2 bits
Free running
5 bits
HOUT
BUFFER
26
13
SYNC INPUT
SELECT
(1bit)
SYNC
PROCESSOR
V
REF
21
1
2
25
29
27
30
31
32
Vcc
XRAY
RESET
GENERATOR
2
X
2
X
2
MOIRE
CANCEL
5 BITS+ON/OFF
+
+
+
17
+
24
B+ ADJUST
7 bits
VSYNC
S AND C
CORRECTION
VERTICAL
OSCILLATOR
RAMP GENERATOR
6 bits
8 bits
VPOS
7bits
keyst
6 bits
PCC
7 bits
VAMP
6 bits
X
2
X
X
2
Amp & symmetry
2x5 bits
Spin Bal
6 bits
Key Bal
6 bits
VAMP
7 bits
H POSITION
B+ OUT
REGIN
BGND
HFOCUS
CAP
FOCUS
ISENSE
EWOUT
VCAP
H/HVIN
HREF
VSYNC
IN
VCC
XRAY
VREF
VGND
5V
SDA
SCL
GND
11
HGND
18
BREATH
DEFLECTION PROCESSOR FOR MULTISYNC MONITORS S1D2511B01
3
PIN CONFIGURATIONS
VREF
SDA
SCL
C0
R0
HPOSITION
PLL1F
PLL2C
XRAY
HOUT
VGND
EWOUT
VCC
GND
9
3
2
1
6
5
8
7
27
21
31
30
25
26
10
19
29
24
VAGCCAP
COMP
HFLY
4
14
12
28
HFOCUSCAP
HLOCKOUT
VSYNCIN
H/HVIN
13
FOCUSOUT
HREF
11
HGND
20
BOUT
5V
VOUT
32
22
VCAP
23
S1D2511B
15
16
18
17
REGIN
ISENSE
BREATH
B+GND
S1D2511B01 DEFLECTION PROCESSOR FOR MULTISYNC MONITORS
4
PIN DESCRIPTION
Table 1. Pin Description
No
Pin Name
Description
1
H/HVIN
TTL compatible horizontal sync input(Separate or composite)
2
VSYNCIN
TTL compatible vertical sync input (for separated H&V)
3
HLOCKOUT
First PLL lock/unlock output (0V unlocked - 5V locked)
4
PLL2C
Second PLL loop filter
5
C0
Horizontal oscillator capacitor
6
R0
Horizontal oscillator resistor
7
PLL1F
First PLL loop filter
8
HPOSITION
Horizontal position filter(Capacitor to be connected to HGND)
9
HFOCUSCAP
Horizontal dynamic focus oscillator capacitor
10
FOCUSOUT
Mixed horizontal and vertical dynamic focus output
11
HGND
Horizontal Section Ground
12
HFLY
Horizontal Flyback Input (positive polarity)
13
HREF
Horizontal Section Reference Voltage (to be filtered)
14
COMP
B+ error amplifier output for frequency compensation and gain setting
15
REGIN
Regulation input of B+ control loop
16
ISENSE
Sensing of external B+ switching transistor current or switch for step-down converter
17
B+GND
Ground (related to B+ reference adjustment)
18
BREATH
DC breathing input control(Compensation of vertical amplitude against EHV variation)
19
VGND
Vertical section ground
20
VAGCCAP
Memory capacitor for automatic gain control loop in vertical ramp generator
21
VREF
Vertical section reference voltage (to be filtered)
22
VCAP
Vertical sawtooth generator capacitor
23
VOUT
Vertical ramp output (with frequency independant amplitude and S or C corrections if any).
It is mixed with vertical position voltage and vertical moire.
24
EWOUT
Pincushion-East/West correction parabola output
25
XRAY
X-RAY protection input (with internal latch function)
26
HOUT
Horizontal drive output (internal transistor, open collector)
27
GND
General ground (referenced to Vcc)
28
BOUT
B+ PWM regulator output
29
Vcc
Supply voltage (12V typ)
30
SCL
I
2
C clock input
31
SDA
I
2
C data input
32
5V
Supply voltage (5V typ)
DEFLECTION PROCESSOR FOR MULTISYNC MONITORS S1D2511B01
5
REFERENCE DATA
Table 2. Reference Data
Parameter
Value
Unit
Horizontal frequency
15 to 150
kHz
Autosynch frequency (for given R0 and C0)
1 to 4.5FO
FH
Horizontal sync polarity input
YES
Polarity detection (on both horizontal and vertical section)
YES
TTL Composite synch
YES
Lock/Unlock identification (on both horizontal 1st PLL and vertical section)
YES
I
2
C control for H-Position
10
%
XRay protection
YES
I
2
C horizontal duty cycle adjust
30 to 60
%
I
2
C free running frequency adjustment
0.8 to 1.3FO
FH
Stand-by function
YES
Dual polarity H-Drive outputs
NO
Supply voltage monitoring
YES
PLL1 inhibition possibility
NO
Blanking output
NO
Vertical frequency
35 to 200
Hz
Vertical autosync (for 150nF on Pin22 and 470nF on Pin20)
50 to 165
Hz
Vertical S-Correction
YES
Vertical C-Correction
YES
Vertical amplitude adjustment
YES
DC breathing control on Vertical amplitude
YES
East/West parabola output(also known as Pin cushion output)
YES
East/West correction amplitude adjustment
YES
Keystone adjustment
YES
Internal dynamic horizontal phase control
YES
Side pin balance amplitude adjustment
YES
Parallelogram adjustment
YES
Tracking of geometric corrections with vertical amplitude and position
YES
S1D2511B01 DEFLECTION PROCESSOR FOR MULTISYNC MONITORS
6
Reference voltage (both on horizontal and vertical)
YES
Dynamic focus (both on horizontal and vertical)
YES
I
2
C horizontal dynamic focus amplitude adjustment
YES
I
2
C horizontal dynamic focus symmetry adjustment
YES
I
2
C vertical dynamic focus amplitude adjustment
YES
Deflection of input Sync type(biased from 5V alone)
YES
Vertical moire output
YES
I
2
C controlled V-moire amplitude
YES
Frequency generator for burn-in
YES
Fast I
2
C read/write
400
kHz
B+ regulation adjustable by I
2
C
YES
Table 2. Reference Data (Continued)
Parameter
Value
Unit
DEFLECTION PROCESSOR FOR MULTISYNC MONITORS S1D2511B01
7
ABSOLUTE MAXIMUM RATINGS
THERMAL CHARACTERISTICS
SYNC PROCESSOR
OPERATING CODNITIONS
No
Item
Symbol
Value
Unit
1
Supply voltage (pin 29)
V
CC
13.5
V
2
Supply voltage (pin 32)
V
DD
5.7
V
3
Maximum voltage on Pin 4
Pin 9
Pin 5
Pins 6,7,8,14,15,16,20,22
Pins 10,18,23,24,25,26,28
Pins 1,2,3,30,31
V
IN
4.0
5.5
6.4
8.0
V
CC
V
DD
V
V
V
4
ESD susceptibillty
Human body model, 100pF discharge through
1.5K
EIAJ norm, 200pF discharge through 0
VESD
2
300
kV
V
5
Storage temperature
Tstg
- 40, +150
C
6
Operating temperature
Topr
0, +70
C
No
Item
Symbol
Value
Unit
1
Junction temperature
Tj
+150
C
2
Junction-ambient thermal resistance
ja
65
C/W
Table 3. Sync Processor Operating Codnitions
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Horizontal sync input voltage
HsVR
Pin 1
0
5
V
Minimum horizontal input pulse duration
MinD
Pin 1
0.7
s
Maximum horizontal input signal duty cycle
Mduty
Pin 1
25
%
Vertical sync input voltage
VsVR
Pin 2
0
5
V
Minimum vertical sync pulse width
VSW
Pin 2
5
s
Maximum vertical sync input duty cycle
VSmD
Pin 2
15
%
Maximum vertical sync width on TTL H/V composite
VextM
Pin 1
750
s
Sink and source current
I
HLOCKOUT
Pin 3
250
A
S1D2511B01 DEFLECTION PROCESSOR FOR MULTISYNC MONITORS
8
ELECTRICAL CHARACTERISTICS
( V
DD
= 5V, Tamb = 25
C )
I
2
C READ/WRITE
(See also I
2
C table control and I
2
C sub address control)
OPERATING CONDITIONS
Table 4. Sync Processor Electrical Characteristics
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Horizontal and vertical input threshold
voltage (pin 1, 2)
VINTH
Low level
High level
2.2
0.8
V
V
Horizontal and vertical pull-up resister
RIN
pins 1,2
200
K
Falling and rising output CMOS buffer
TfrOut
pin 3, Cout = 20pF
200
ns
Horizontal 1st PLL lock output status
(pin 3)
VHlock
Locked, I
LOCKOUT
= -250
A
Unlocked, I
LOCKOUT
= +250
A
0
5
0.5
V
V
Extracted vsync integration time (% of
TH
(9)
) on H/V composite
VoutT
C0 = 820pF
26
35
%
Table 5. I
2
C Read/Write Operating Conditions
Parameter
Symbol
Min
Typ
Max
Unit
Input High Level Voltage
VinH
3.0
-
5.0
V
Input Low Level Voltage
VinL
0
-
1.5
V
SCL Clock frequency
fSCL
-
-
200
kHz
Hold time before a new transmission can start
tBUF
1.3
-
-
uS
Hold time for Start conditions
tHDS
0.6
-
-
uS
Set-Up time for Stop conditions
tSUP
0.6
-
-
uS
The Low Period of SCL
tLOW
1.3
-
-
uS
The High Period of SCL
tHIGH
0.6
-
-
uS
Hold time data
tHDAT
0.3
-
-
uS
Set-Up time data
tSUPDAT
0.25
-
-
uS
Rise time of SCL
tR
-
-
1.0
uS
Fall time of SCL
tF
-
-
3.0
uS
DEFLECTION PROCESSOR FOR MULTISYNC MONITORS S1D2511B01
9
I
2
C BUS Timing Requirement
ELECTRICAL CHARACTERISTICS
( V
DD
= 5V, Tamb = 25
C)
HORIZONTAL SECTION
OPERATING CONDITIONS
Table 6. I
2
C Read/Write Electrical Characteristics
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
I
2
C PROCESSOR
Maximum clock frequency
Fscl
Pin 30
400
kHz
Low period of the SCL clock
Tlow
Pin 30
1.3
s
High period of the SCL clock
Thigh
Pin 30
0.6
s
SDA and SCL input threshold
Vinth
Pin 30, 31
2.2
V
Acknowledge output voltage on SDA input with
3mA
VACK
Pin 31
0.4
V
Table 7. Horizontal Section Operating Conditions
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
VCO
Minimum oscillator resistor
R
0(Min.)
Pin 6
6
K
Minimum oscillator capacitor
C
0(Min.)
Pin 5
390
pF
Maximum oscillator frequency
F
(Max.)
150
kHz
OUTPUT SECTION
Maximum input peak current
I12m
Pin 12
5
mA
Horizontal drive output maximum
current
HOI
Pin26, sunk current
30
mA
tBUF
Start:Clock High
Stop:Clock High
SDA
SCL
tLOW
tHDS
tSUPDAT
Data Change:Clock Low
tSUP
tHDAT
tHIGH
S1D2511B01 DEFLECTION PROCESSOR FOR MULTISYNC MONITORS
10
ELECTRICAL CHARACTERISTICS
( V
DD
= 5V, Tamb = 25
C)
Table 8. Horizontal Section Electrical Characteristics
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
SUPPLY AND REFERENCE VOLTAGE
Supply voltage
Vcc
Pin 29
10.8
12
13.2
V
Supply voltage
V
DD
Pin 32
4.5
5
5.5
V
Supply current
I
CC
Pin 29
50
mA
Supply current
I
DD
Pin 32
5
mA
Horizontal reference voltage
V
REF-H
Pin 13, I=-2mA
7.4
8
8.6
V
Vertical reference voltage
V
REF-V
Pin 21, I=-2mA
7.4
8
8.6
V
Max. sourced current on V
REF-H
I
REF-H
Pin 13
5
mA
Max. sourced current on V
REF-V
I
REF-V
Pin 21
5
mA
1st PLL SECTION
Polarity integration delay
HpoIT
Pin 1
0.75
ms
VCO control voltage (pin 7)
V
VCO
V
REF-H
=8V
f0
fH (Max.)
1.3
6.2
V
V
VCO gain (pin 7 )
V
COG
R
0
=6.49K
, C
0
=820pF,
dF/dV=1/11R
0
C
0
17
kHz/V
Horizontal phase adjustment
(11)
Hph
% of horizontal period
10
%
Horizontal phase setting value(Pin 8)
(11)
Minimum current value
Typical value
Maximum value
Hphmin
Hphtyp
Hphmax
Sub-address 01
Byte x 1111111
Byte x 1000000
Byte x 0000000
2.6
3.2
3.8
V
V
V
PLL1 filter current charge
IPII1U
IPII1L
PLL1 is unlocked
PLL1 is locked
140
1
A
mA
Free running frequency
fo
R
0
=6.49K
,C
0
=820pF,
f
0
=0.97/8R
0
C
0
140
1
A
mA
Free running frequency thermal drift
(no drift on external components)
(7)
dF0/dT
-150
ppm/c
Free running frequency adjustment
Minimum value
Maximum value
f
0
(Min.)
f
0
(Max.)
Sub-address 02
Byte x x x 11111
Byte x x x 00000
0.8
1.3
F0
F0
PLL1 capture range
CR
R
0
=6.49K
,C
0
=820pF,
from f
0
+0.5KHz to 4.5Fo
fH(Min.)
fH(Max.)
100
23.5
KHz
KHz
Safe forced frequency
SF1 Byte 11 x x x x x x
SF2 Byte 10 x x x x x x
SFF
Sub-address 02
2F0
3F0
2ND PLL SECTION HORIZONTAL OUTPUT SECTION
DEFLECTION PROCESSOR FOR MULTISYNC MONITORS S1D2511B01
11
Flyback input threshold
voltage (pin12)
FBth
0.65
0.75
V
Horizontal jitter
Hjit
70
ppm
Horizontal drive output duty-cycle
(pin 26)
(1, 2)
Low level
High level
HDmin
HDmax
Sub-address 00
Byte xxx11111
Byte xxx00000
(2)
30
60
%
%
X-RAY protection input threshold
voltage
XRAYth
Pin 25
(12)
8
V
Internal clamping levels on 2nd PLL loop
filter (pin 4 )
Vphi2
Low level
High level
1.6
3.7
V
V
Threshold voltage to stop H-out, V-out
when V
CC
< VSCinh
VSCinh
Pin 29
7.5
V
Horizontal drive output (low level)
HDvd
Pin 26 I
OUT
=30mA
0.4
V
HORIZONTAL DYNAMIC FOCUS FUNCTION
Horizontal dynamic focus sawtooth
Minimum level
Maximum level
HDFst
Capacitor on HfocusCap
and C0=820pF,
TH=20
S, Pin 9
2
4.7
V
V
Horizontal dynamic focus sawtooth
Discharge width
HDFdis
Start by Hfly center
400
ns
Bottom DC output level
HDFDC
R
LOAD
=10K
, pin 10
2
V
DC output voltage thermal drift
TDHDF
200
ppm/C
Horizontal dynamic focus amplitude
Min Byte xxx11111
Typ Byte xxx10000
Max Byte xxx00000
HDFamp
Sub-address 03, pin 10,
FH=50kHz, Keystone
Typ
1
1.5
3
Vpp
Vpp
Vpp
Horizontal dynamic focus keystone
Min A/B Byte xxx11111
Typ Byte xxx10000
Max Byte xxx00000
HDFkeyst
Sub-address 04,
FH = 50kHz, Typ amp
B/A
A/B
A/B
2.2
2.2
3.5
1.0
3.5
VERTICAL DYNAMIC FOCUS FUNCTION (POSITIVE PARABOLA)
Vertical dynamic focus parabola (added to
horizontal one) amplitude with VOUT and
VPOS typical
Min. Byte 000000
Typ. Byte 100000
Max. Byte 111111
AMPVDF
Sub-address 0F
0
0.5
1
Vpp
Vpp
Vpp
Parabola amplitude function of VAMP
(tracking between VAMP and VDF) with
VPOS typ. (see figure 1)
(3)
VDFAMP
Sub-address 05
Byte 10000000
Byte 11000000
Byte 11111111
0.6
1
1.5
Vpp
Vpp
Vpp
Parabola assymetry function of VPOS
control (tracking between VPOS and VDF)
with VAMP Max.
VHDFKeyt
Sub-address 06
Byte x0000000
Byte x1111111
0.52
0.52
Vpp
Vpp
Table 8. Horizontal Section Electrical Characteristics (Continued)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
S1D2511B01 DEFLECTION PROCESSOR FOR MULTISYNC MONITORS
12
VERTICAL SECTION
OPERATING CONDITIONS
ELECTRICAL CHARACTERISTICS
(V
CC
= 12V, Tamb = 25
C)
Table 9. Vertical Section Operating Conditions
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
OUTPUTS SECTION
Maximum EW output voltage
VEWM
Pin 24
6.5
V
Minimum EW output voltage
VEWm
Pin 24
1.8
V
Minimum load for less than 1% vertical amplitude drift
R
LOAD
Pin 20
65
M
Table 10. Vertical Section Electrical Characteristics
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
VERTICAL RAMP SECTION
Voltage at ramp bottom point
VRB
V
REF-V
=8V, pin 22
2
V
Voltage at ramp top point (with sync) V
REF-V
VRT
V
REF-V
=8V, Pin 22
5
V
Voltage at ramp top point (without sync)
VRTF
Pin 22
VRT-01
V
Vertical sawtooth discharge time duration (pin 22)
VSTD
With 150nF cap
70
s
Vertical free running frequency
see
(4, 5)
VFRF
C
OSC(pin22)
=150nF
measured on pin 22
100
Hz
AUTO -SYNC frequency
(13)
ASFR
C
22
=150nF
5%
See
(6)
50
165
Hz
Ramp amplitude drift versus frequency at
Maximum vertical amplitude
RAFD
C
22
=150nF
50Hz<f and f<165Hz
200
TBD
ppm/
Hz
Ramp linearity on pin 22 (
I22/I22)
see
(4, 5)
RIin
V
20
=4.3v,
2.5<V
27
&
V
27
<4.5V
0.5
%
Vertical position adjustment voltage
(pin 23 - VOUT centering)
Vpos
Sub address 06
Byte x0000000
Byte x1000000
Byte x1111111
3.65
3.2
3.5
3.8
3.3
V
V
V
Vertical output voltage
(peak-to-peak on pin 23 )
VOR
Sub address 05
Byte x0000000
Byte x1000000
Byte x1111111
3.5
2.25
3
3.75
2.5
V
V
V
Vertical output Maximum current(Pin 23)
VOI
5
mA
Max vertical S-correction amplitude
(14)
XOXXXXXX inhibits S-C
ORR
X1111111 gives max S-C
ORR
dVS
Sub address 07
V/Vpp at TV/4
V/Vpp at 3TV/4
-4
+4
%
%
DEFLECTION PROCESSOR FOR MULTISYNC MONITORS S1D2511B01
13
Vertical C-Corr amplitude
XOXXXXXX inhibits C-corr
Ccorr
Sub address 08
V/Vpp at TV/2
Byte X1000000
Byte X1100000
Byte X1111111
-3
0
3
%
%
%
EAST/WEST FUNCTION
DC output voltage with typ Vpos, keystone,
corner and corner balance inhibited
EW
DC
pin 24,
see figure 2
2.5
V
DC output voltage thermal drift
TDEW
DC
see note 7
100
ppm/
C
Parabola amplitude with Vamp Max.
V-Pos typ, keystone ilhibited
EWpara
Sub address 0A
Byte 1111111
Byte 1010000
Byte 1000000
2.5
1.25
0
V
V
V
Parabola amplitude function of V-AMP control
(tracking between V-AMP and E/W) with typ Vpos
ketstone, EW Typ amplitude
(8)
EWtrack
Sub address 05
Byte 1000000
Byte 1100000
Byte 1111111
0.45
0.8
1.25
V
V
V
Keystone adjustment capability with typ Vpos,
EW typ amplitude and vertical amplitude max,
(8)
A/B Ratio(see figure 2)
B/A Ratio
KeyAdj
Sub address 09
Byte 1x000000
Byte 1x111111
1
1
Vpp
Vpp
Intrinsic keystone function of V-POS control
(tracking between V-pos and EW) Max amplitude
and vertical amplitude max.
(10)
A/B Ratio
B/A Ratio
Key-
Track
Sub address 09
Byte x0000000
Byte x1111111
0.52
0.52
INTERNAL HORIZONTAL DYNAMIC PHASE CONTROL FUNCTION
Side pin balance parabola amplitude (figure3) with
Vamp max, V-POS typ and parallelogram inhibited
(8,9)
SPBpara
Sub address 0D
Byte x1111111
Byte x0000000
+1.4
-1.4
%TH
%TH
Side pin balance parabola amplitude function of
Vamp control (tracking between Vamp and SPB)
with SPB max, V-POS typ and parallelogram
inhibited
(8,9)
SPBtrack
Sub address 05
Byte 10000000
Byte 11000000
Byte 11111111
0.5
0.9
1.4
%TH
%TH
%TH
Parallelogram adjustment capability with Vamp
max, V-POS typ and SPB max
(8,9)
A/B Ratio
B/A Ratio
ParAdj
Sub address 0E
Byte x1111111
Byte x1000000
+1.4
-1.4
%TH
%TH
Intrinsic parallelogram function of Vpos control
(tracking between V-pos and DHPC) with Vamp
max, SPB max and parallelogram inhibited
(8, 9)
A/B Ratio
B/A Ratio
Partrack
Sub address 06
Byte x0000000
Byte x1111111
0.52
0.52
Table 10. Vertical Section Electrical Characteristics (Continued)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
S1D2511B01 DEFLECTION PROCESSOR FOR MULTISYNC MONITORS
14
B+ SECTION
OPERATING CONDITIONS
ELECTRICAL CHARACTERISTICS
(V
CC
= 12V, Tamp = 25
C )
VERTICAL MOIRE
Vertical moire (measured on VOUTDC) pin 23
VMOIRE
Sub address 0C
Byte 01x11111
6
mV
BREATHING COMPENSATION
DC breathing control range
(15)
BRRANG
V18
1
12
V
Vertical output variation versus DC breathing con-
trol (Pin 23)
BRADj
V18
V
REF-V
V18=4V
0
-10
%
%
Table 11. B+ Section
Operating Conditions
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Minimum feedback resistor
FeedRes
Resistor between pins 15 and 14
5
K
Table 12. B+ Section Electrical Characteristics
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Error amplifier open loop gain
OLG
At low frequency
(10)
85
dB
Unity gain band width
UGBW
see
(7)
6
MHz
Regulation input bias current
IRI
Current sourced by pin 15
(PNP base)
0.2
A
Maximum guaranted error amplifier
output current
EAOI
Current sourced by pin 14
Current sunk by pin 14
0.5
2
mA
mA
Current sense input voltage gain
CSG
Pin 16
3
Max current sense input thres hold
voltage
MCEth
Pin 16
1.2
V
Current sense input bias current
ISI
Current sunk by pin 16
(NPN base )
1
A
Maxmum external power transistor on
time
Tonmax
% of H-period
@ f0=27kHz
(16)
100
%
B+ output low level saturation voltage
B+OSV
V
28
with I
28
=10mA
0.25
V
Internal reference voltage
IV
REF
On error amp
(+) input for subaddress 0B
byte 1000000
4.8
V
Table 10. Vertical Section Electrical Characteristics (Continued)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
DEFLECTION PROCESSOR FOR MULTISYNC MONITORS S1D2511B01
15
Internal reference voltage adjustment
range
V
REFADJ
Byte 111111
Byte 000000
+20
-20
%
%
Threshold for step-up/step-down selec-
tion
DWMSEL
Pin 16
6
V
Falling time
t
FB+
Pin 28
100
ns
Table 12. B+ Section Electrical Characteristics
S1D2511B01 DEFLECTION PROCESSOR FOR MULTISYNC MONITORS
16
NOTES;
1.Duty cycle is the ratio of power transistor OFF time period. Power transistor is OFF when output transistor is
OFF.
2.Initial condition for safe operation start up.
3.S and C correction are inhibited so the output sawtooth has a linear shape.
4.With register 07 at byte x0xxxxxx (s-correction control is inhibited) then the S correction is inhibited, consequently
the sawtooth has a linear shape.
5.With register 08 at byte x0xxxxxx (C-Correction control is inhibited) then the C correction is inhibited,
consequently the sawtooth has a linear shape.
6.It is frequency range for which the vertical oscillator will automatically synchronize, using a single capacitor value
on pin 22, and with a constant ramp amplitude.
7.These parameters are not tested on each unit. They are measured during out internal qualification.
8.Refers to notes 4 & 5 from last section.
9.TH is the Horizontal period.
10.These parameters are not tested on each unit. They are measured during our internal qualification procedure
which incudes characterization on batches comming from corners of our processes and also temperature char
acterization.
11. See Figure 11 for explanation of reference phase.
12. See Figure 15.
13. This is the frequency range for which the vertical oscillator will automatically synchronize, using a single
capacitor value on Pin 22 and with a constant ramp amplitude.
14. TV is the vertical period.
15. When not used the DC breathing control pin must be connected to 12V.
16. The external power transistor is OFF during 400ns of the HFOCUSCAP discharge.
DEFLECTION PROCESSOR FOR MULTISYNC MONITORS S1D2511B01
17
Figure 1. Vertical Dynamic Focus Function
Figure 2. E/W Output
Figure 3. Dynamic Horizontal Phase Control Output
VDF
DC
VDF
AMP
A
B
EW
PARA
A
B
EW
DC
EW
PARA
A
B
SPB
PARA
DHPC
PC
S1D2511B01 DEFLECTION PROCESSOR FOR MULTISYNC MONITORS
18
Figure 4. Typical Vertical Output Waveforms
Function
Sub
address
Pin
Byte
Specification
Picture Image
Vertical Size
05
23
10000000
11111111
Vertical
Position
DC
Control
06
23
x0000000
x1000000
x1111111
3.2V
3.5V
3.8V
Vertical
S
Linearity
07
23
x0xxxxxx
Inhibited
x1111111
Vertical
C
Linearity
08
23
x1000000
x1111111
V
OUTDC
V
OUTDC
2.25V
3.75V
Vpp
V
Vpp
V =4%
Vpp
Vpp
V
V =3%
Vpp
V
V =3%
Vpp
DEFLECTION PROCESSOR FOR MULTISYNC MONITORS S1D2511B01
19
Figure 5. Geometry Output Waveforms
Function
Sub
address
Pin
Byte
Specification
Picture Image
Key Stone
(Trapezoid)
Control
09
24
EWamp
Typ.
10000000
1111111
E/W
(Pin Cushion)
Control
0A
24
Keystone
Inhibited
1x000000
1x111111
Parallelogram
Control
0E
Internal
SPB
Inhibited
x1000000
x111111
Side Pin
Balance
Control
0D
Internal
Parallelogram
Inhibited
x0000000
x1111111
Vertical
Dynamic
Focus
with Horizontal
32
1.0V
1.0V
2.5V
2.5V
2.5V
0V
2.5V
3.7V
1.4% TH
3.7V
1.4% TH
1.4% TH
3.7V
3.7V
1.4% TH
2V
S1D2511B01 DEFLECTION PROCESSOR FOR MULTISYNC MONITORS
20
I
2
C BUS ADDRESS TABLE
Slave Address (8C): Write Mode
Sub Address Definition

Slave Address (8D): Read Mode
No Sub Address needed
D8
D7
D6
D5
D4
D3
D2
D1
0
0
0
0
0
0
0
0
0
Horizontal drive selection/horizontal duty cycle
1
0
0
0
0
0
0
0
1
Horizontal position
2
0
0
0
0
0
0
1
0
Forced frequcny /free running frequency
3
0
0
0
0
0
0
1
1
Synchro priority / horizontal focus amplitude
4
0
0
0
0
0
1
0
0
Refresh /horizontal focus keystone
5
0
0
0
0
0
1
0
1
Vertical ramp amplitude
6
0
0
0
0
0
1
1
0
Vertical position adjustment
7
0
0
0
0
0
1
1
1
S Correction
8
0
0
0
0
1
0
0
0
C Correction
9
0
0
0
0
1
0
0
1
E/W keystone
A
0
0
0
0
1
0
1
0
E/W amplitude
B
0
0
0
0
1
0
1
1
B+ reference adjustment
C
0
0
0
0
1
1
0
0
Vertical moire
D
0
0
0
0
1
1
0
1
Side pin balance
E
0
0
0
0
1
1
1
0
Parallelogram
F
0
0
0
0
1
1
1
1
Vertical dynamic focus amplitude
DEFLECTION PROCESSOR FOR MULTISYNC MONITORS S1D2511B01
21
I
2
C BUS ADDRESS TABLE (continued)
D8
D7
D6
D5
D4
D3
D2
D1
WRITE MODE
00
HDrive
0, off
[1],on
Horizontal duty cycle
[0]
[0]
[0]
[0]
[0]
01
Xray
1,reset
[0]
Horizontal phase adjustment
[1]
[0]
[0]
[0]
[0]
[0]
[0]
02
Forced frequency
Free running frequency
1,on,
[0],off
1,F0x2
[0],F0x3
[0]
[0]
[0]
[0]
[0]
03
Sync
0, comp
[1], sep
Horizontal focus amplitude
[1]
[0]
[0]
[0]
[0]
04
Detect
refresh
[0], off
Horizontal focus keystone
[1]
[0]
[0]
[0]
[0]
05
Vramp
0, off
[1], on
Vertical ramp amplitude adjustment
[1]
[0]
[0]
[0]
[0]
[0]
[0]
06
Vertical position adjustment
[1]
[0]
[0]
[0]
[0]
[0]
[0]
07
S Select
1, on
[0]
S Correction
[1]
[0]
[0]
[0]
[0]
[0]
08
C Select
1, on
[0]
C Correction
[1]
[0]
[0]
[0]
[0]
[0]
09
EW key
0, off
[1]
East/West keystone
[1]
[0]
[0]
[0]
[0]
[0]
0A
EW sel
0, off
[1]
East/West amplitude
[1]
[0]
[0]
[0]
[0]
[0]
[0]
0B
Test H
1, on
[0], off
B+ reference adjustment
[1]
[0]
[0]
[0]
[0]
[0]
[0]
0C
Test V
1, on
[0], off
Moire 1, on
[0]
Vertical Moire
[0]
[0]
[0]
[0]
[0]
0D
SPB sel
0, off
[1]
Side pin balance
[1]
[0]
[0]
[0]
[0]
[0]
0E
Parallelo
0, off
[1]
Parallelogrm
[1]
[0]
[0]
[0]
[0]
[0]
0F
Vertical dynamic focus amplitude
[1]
[0]
[0]
[0]
[0]
[0]
S1D2511B01 DEFLECTION PROCESSOR FOR MULTISYNC MONITORS
22
[ ] initlal value
OPERATING DESCRIPTION
GENERAL CONSIDERATIONS
Power Supply
The typical values of the power supply voltages Vcc and V
DD
are respectively 12V and 5V. Perfect operation is
obtained if Vcc and V
DD
are maintened in the limits: 10.8 to 13.2V and 4.5 to 5.5V.
In order to avoid erratic operation of the circuit during transient phase of Vcc switching on, or switching off, the
value of Vcc is monitored and the outputs of the circuit are inhibited if Vcc is less than 7.5V typically.
In the same manner, V
DD
is monitored and internal set-up is made until V
DD
reaches 4V (see I
2
C control table for
power on reset).
In order to have a very good power supply rejection, the circuit is internally powered by several internal voltage
references (the unigue typical value of which is 8V). Two of these voltage references are externally accessible, one
for the vertical part and on one for the horizontal one. If needed, these voltage references can be used (until Iload
is less than 5mA). Furthermore it is necessary to filter the a.m. voltage references by the use of external capacitor
connected to ground, in order to minimize the noise and consequently the
"
jitter
"
on vertical and horizontal output
signals.
I
2
C Control
KB2511 belongs to the I
2
C controlled device family, instead of being controlled by DC voltage on dedicated control
pins, each adjustment can be realized through the I
2
C interface. The I
2
C bus is a serial bus with a clock and a data
input. The general function and the bus protocol are specified in the philips-bus data sheets.
The interface (data and clock) is TTL-level compatible. The internal threshold level of the input comparator is 2.2V
(when V
DD
is 5V). Spikes of up to 500ns are filtered by an integrator and maximum clock speed is limited to
400kHz.
The data line (SDA) can be used in a bidirectional way that means in read-mode the IC clocks out a reply informa-
tion (1byte) to the micro-processor.
The bus protocol prescribes always a full-byte transmission. The first byte after the start condition is used to trans-
mit the IC-address (hexa 8C for write, 8D for read).
Write Mode
In write mode the second byte sent contains the subaddress of the selected function to adjust (or controls to affect)
and the third byte the corresponding data byte. It is possible to send more than one data byte to the IC. If after the
third byte no stop or start condition is detected, the circuit increments automatically the momentary subaddress in
the subaddress counter by one (auto-increment mode). So it is possible to transmit immediately the next data
bytes without sending the IC address or subaddress. It can be useful so as to reinitialize the whole controls very
quickly (flash manner). This procedure can be finished by a stop condition.
The circuit has 16 adjustment capabilities: 3 for horizontal part, 4 for vertical one, 2 for E/W correction, 2 for the
dynamic horizontal phase control, 1 for moire option, 3 for horizontal and vertical dynamic focus and 1 for B+
reference adjustment.
17 bits are also dedicated to several controls (ON/OFF, horizontal forced frequency, sync priority, detection
refresh and Xray reset).
READ MODE
00
Hlock
0, on
[1], no
Vlock
0, on
[1], no
Xray
1,on
[0],off
Polarity detection
Synchro detection
H/V pol
[1],negative
V pol
[1], negative
Vext det
[0],no det
H/V det
[0],no det
V det
[0], nodet
DEFLECTION PROCESSOR FOR MULTISYNC MONITORS S1D2511B01
23
Read Mode
During read mode the second byte transmits the reply information.
The reply byte contains horizontal and vertical lock/unlock status, Xray activated or not, the horizontal and vertical
polarity detection. It also contains synchro detection status that is useful for
P to assign sync priority.
A stop condition always stops all activities of the bus decoder and switches the data and the clock line (SDA and
SCL) to high impedance.
See I
2
C subaddress and control tables.
Sync processor
The internal sync processor allows the S1D2511B01 to accept any kind of input synchro signals:
- separated horizontal & vertical TTL-compatible sync signals,
- composite horizontal & vertical TTL-compatible sync signals.
Sync identification Status
The MCU can read (address read mode : 8D) the status register via the I
2
C bus, and then select the sync priority
depending on this status.
Among other data this register indicates the presence of sync pulses on H/HVIN, VSYNCIN and(when 12V is sup-
plied) whether a Vext has been extracted from H/HVIN. Both horizontal and vertical sync are detected even if only
5V is supplied.
In order to choose the right sync priority the MCU may proceed as follows(see I
2
C Address Table):
- refresh the status register,
- wait at least for 20ms(MAX. vertical period),
- read this status register,
Sync priotity choice should be:
Of course, when choice is made, one can refresh the sync detections and verify that extracted Vsync is present
and that no sync change occured.
Sync processor is also giving sync polarity information.
IC status
The IC can inform the MCU about the 1st horizontal PLL and vertical section status, and about the Xary protection
(activated or not). Resetting the XRAY internal latch can be done either by decreasing the Vcc supply or directly
resetting it via the I
2
C interface.
Sync Inputs
Both H/HVin and Vsyncin inputs are TTL compatible trigger with hysterisis to avoid erratic detection.
Both inputs include a pull up register connected to V
DD
.
Sync Processor Output
The sync processr indicates on the HLOCKOUT Pin whether 1st PLL is locked to an incoming horizontal sync.
HLOCKOUT is a TTL compatible CMOS output. Its level goes to high when locked. In the same time the D8 bit of
the status regiser is set to 0. This information is mainly used to trigger safety procedures(like reducing B+ value) as
soon as a change is detected on the incoming sync. Further to this, it may be used in an automatic procedure for
Vext det
H/V det
V det
Sync priority subaddress 03 (D8)
Comment sync type
No
Yes
Yes
1
Separated H & V
Yes
Yes
No
0
Composite TTL H & V
S1D2511B01 DEFLECTION PROCESSOR FOR MULTISYNC MONITORS
24
free running frequency(fo) adjustment.
Sending the desired fo on the sync input and progressively decreasing the free running frequently I
2
C register
value(address 02), the HLOCKOUT Pin will go high as soon as the proper setting is reached. Setting the free run-
ning frequency this way allows to fully exploit the S1D2511B01 horizontal frequency range.
HORIZONTAL PART
Internal input conditions
Horizontal part is internally fed by synchro processor with a digital signal corresponding to horizontal synchro
pulses or to TTL composite input.
concerning the duty cycle of the input signal, the following signals (positive or negative)may be applied to the
circuit.
Using internal integration, both signals are recognized on condition that Z/T < 25%, synchronisation occurs on the
leading edge of the internal sync signal. The minimum value of Z is 0.7
s.
Figure 6.
An other integration is able to extract vertical pulse of composite synchro if duty cycle is more than 25% (typically
d = 35%)
(7)
Figure 7.
The last feature performed is the equalizing pulses removing to avoid parasitic pulse on phase comparator input
which is intolerent to wrong or missing pulse.
PLL1
The PLL1 is composed of a phase comparator, an external filter and a voltage control oscillator (VCO).
The phase comparator is a phase frequency type designed in CMOS technology. This kind of phase detector
avoids locking on false frequencies. It is followed by a charge pump, composed of two current sources sunk and
sourced (I = 1mA typ. when locked, I = 140mA when unlocked). This difference between lock/unlock permits a
smooth catching of horizontal frequency by PLL1. This effect is reinforced by an internal original slow down system
when PLL1 is locked avoiding horizontal too fast frequency change.
The dynamic bahaviour of the PLL is fixed by an external filter which integrates the current of the charge pump.
A CRC filter is generally used (see figure 8 )
Z
T
Z
d
d
c
TRAMEXT
DEFLECTION PROCESSOR FOR MULTISYNC MONITORS S1D2511B01
25
Figure 8.
PLL1 is internally inhibited during extracted vertical sync (if any) to avoid taking in account missing pulses or wrong
pulse on phase comparator. The inhibition results from the opening of a switch located between the charge pump
and the filter (see figure 9 ).
The VCO uses an external RC network. It delivers a linear sawtooth obtained by charge and discharge of the
capacitor, by a current proportionnal to the current in the resistor. Typical thresholds of sawtooth are 1.6V and
6.4V.
Figure 9. Block Diagram
7
PLL1F
1.8K
4.7uF
1uF
INPUT
INTERFACE
COMP1
CHARGE
PUMP
PLL
INHIBITION
VCO
7
8
9
LOCKDET
8
PHASE
ADJUST
OSC
I
2
C
HPOS
Adj.
Low
High
E2
TRAMEXT
HSYNC
H-LOCKCAP
LOCK/UNLOCK
STATUS
TRAMEXT
I
2
C
SMFE
MODE
PLL1F R0
C0
S1D2511B01 DEFLECTION PROCESSOR FOR MULTISYNC MONITORS
26
Figure 10. Details of VCO
The control voltage of the VCO is typically comprised between 1.33V and 6V (see figure 10). The theorical
frequency range of this VCO is in the ratio 1 to 4.5, the effective frequency range has to be smaller 1 to 4.2 due to
clamp intervention on filter lowest value. To avoid spread of external components and the circuit itself, it is possible
to adjust free running frequency through I
2
C. This adjustment can be made automatically on the manufacturing line
without manual operation by using hlock/unlodk information. The adjustment range is 0.8 to 1.3 F0 (where 1.3 F0 is
the free running frequency at power on reset).
The sync frequency has to be always higher than the free running frequency. As an example for a synchro range
from 24kHz to 100kHz, the suggested free running frequency is 23kHz.
An other feature is the capability for MCU to force horizontal frequency throw I
2
C to 2xF0 or 3xF0 (for burn in mode
or safety requirement). In this case, inhibition switch is opened leaving PLL1 free but voltage on PLL1 filter is
forced to 2.66V for 2xF0 or 4.0V for 3xF0.
The PLL1 ensures the coincidence between the leading edge of the synchro signal and a phase reference
obtained by comparism between the sawtooth of the VCO and an internal DC voltage I
2
C adjustable between
2.65V and 3.75V (corresponding to
10%) (see figure 11)
Figure 11. PLL1 Timing Diagram
7
6
a
2
4 I
0
2
I
D
+
-
+
-
6.4V
+
-
RS
FLIP
FLOP
5
Loop
Filter
(0.80<a<1.30)
I
2
C Free running
I
D
(1.3V < V
7
< 6V)
R0
1.6V
6.4V
1.6V
0.84T
0
T
Adjustment
Co
H Osc
Sawtooth
7/8T
H
1/8T
H
6.4V
2.65V < Vb < 3.75V
Vb
1.6V
Phase REF1
H Synchro
Phase REF1 is obtained by compari-
sion between the sawtooth and a DC
voltage adjustable between 2.6V and
3.8V. The PLL1 ensures the exact
coindidence between the signals
phase REF and HSYNS. A
T
H
/10
phase adjustment is possible
DEFLECTION PROCESSOR FOR MULTISYNC MONITORS S1D2511B01
27
The S1D2511B01 also includes a lock/unlock identification block which senses in real time whether PLL1 is locked
or not on the incoming horizontal sync signal. The resulting information is available on Hlockout (see sync proces-
sor). The block function is described in figure 12.
When PLL1 is unlocked, It forces Hlockout to leave high.
The lock/unlock information is also available throw I
2
C read.
PLL2
The PLL2 ensures a constant position of the shaped flyback signal in comparism with the sawtooth of the VCO
(figure 12).
The phase comparator of PLL2 (phase type comparator) is followed by a charge pump(typical output cur-
rent:0.5mA).
The flyback input is composed of an NPN transistor. This input must be current driven. The maximum
recommanded input current is 5mA (see figure 13).
The dury cycle is adjustable through I
2
C from 30% to 60%. For startup safe operation, initial duty cycle (after power
on reset) is 60% in order to avoid having a too long conduction period of the horizontal scanning transistor. The
maximum storage time(Ts MAX.) is (0.38T
H
-T
FLY
/2). Typically, T
FLY
/TH is around 20% which means that Ts max
is around 28% of T
H
.
Figure 12. PLL2 Timing Diagram
Figure 13. Flyback Input Electrical Diagram
H Osc
Sawtooth
7/8T
H
1/8T
H
6.4V
3.7V
1.6V
Shaped Flyback
H drive
Flyback
Internally
Duty Cycle
Ts
12
HFLY
400
20K
Q1
GND 0V
S1D2511B01 DEFLECTION PROCESSOR FOR MULTISYNC MONITORS
28
Output Section
The H-drive signal is transmitted to the output through a shaping block ensuring TS and I
2
C adjustable duty cycle.
In order to secure scanning power part operation, the output is inhibited in the following circumstances:
- Vcc too low
- Xray protection activated
- During horizontal flyback
- H Drive I
2
C bit control is off.
The output stage is composed of a NPN bipolar transistor. Only the collector is accessible (see figure 14).
Figure 14.
The output NPN is in off-state when the power scanning transistor is also in off-state.
The maximum output current is 30mA, and the corresponding voltage drop of the output V
CEsat
is 0.4V typically.
It is evident that the power scanning transistor cannot be directly driven by the integrated circuit. An interface has
to be designed between the circuit and the power transistor which can be of bipolar or MOS type.
X-RAY protection
The activation of the X-ray protection is obtained by application of a high level on the X-ray input (8V on pin 25). It
inhibits the H-Drive and B+ outputs.
This protection is latched; It may be reset either by Vcc switch off or by I
2
C(see figure 15).
Horizontal and vertical dynamic focus
The S1D2511B01 delivers and horizontal parabola added on a vertical parabola wavefrom on pin 10. This horizon-
tal parabola is performed from a sawtooth in phase with flyback pulse middle. This sawtooth is present on pin 9
where the horizontal focus capacitor is the same as C0 to obtain a controlled amplitude (from 2 to 4.7V typically).
Symmetry (keystone) and amplitude are I
2
C adjustable (see figure 16). Vertical dynamic focus is tracked with
VPOS and VAMP. Its amplitude can be adjusted. It is also affected by S and C corrections. This positive signal has
to be connected to the CRT focusing grids.
26 H-DRIVE
DEFLECTION PROCESSOR FOR MULTISYNC MONITORS S1D2511B01
29
Figure 15. Safety Functions Block Diagram
Figure 16.
-
+
-
+
S
R
Q
I
2
C Drive on/off
Vcc checking
Vcc
VSCinh
XRAY protection
Xray
Vcc off or I
2
C reset
Horizontal flyback
0.7V
I
2
C ramp on/off
HORIZONTAL
OUTPUT
INHIBITION
VERTICAL
OUTPUT
INHIBITION
BOUT

400ns
4.7V
2V
2V
Moire output
Horizontal flyback
Horizontal flyback
Internal triggerd
Cap Sawtooth
Horizontal focus
Horizontal dynamic
focus parabola
output
S1D2511B01 DEFLECTION PROCESSOR FOR MULTISYNC MONITORS
30
VERTICAL PART
Geometric Corrections
The principle is represented in figure 17.
Figure 17. Geometric Correcitions Principle
Starting from the vertical ramp, a parabola shaped current is generated for E/W correction, dynamic horizontal
phase control correction, and vertical dynamic focus correction.
The base of the parabola generator is an analog multiplier, the output current of which is equal to:
I = k
( V
OUT
- V
DCMID
)
2
Where Vout is the vertical output ramp(typically between 2 and 5V) and V
DCMID
is 3.5V(for V
REF-V
=8V). The VOUT
sawtooth is typically centered on 3.5V. By changing the vertical position, the sawtooth shifts by
0.3V.
In order to keep a good screen geometry for any end user preference adjustment we implemented the geometry
tracking.
Due to large output stages voltage range (E/W, FOCUS), the combination of tracking function with maximum verti-
cal amplitude max or min vertical position and maximum gain on the DAC control may lead to the output stages
saturation. This must be avoided by limiting the output voltage by appropriate I
2
C registers values.
For E/W part and Dynamic Horizontal phase control part, a sawtooth shaped differential current in the following
form is generated:
I
'
= k
'
( V
OUT
- V
DCMID
)
2
Then
I and
I
'
are added together and converted into voltage for the E/W part.
Each of the two E/W components or the two Dynamic horizontal phase control ones may be inhibited by their own
I
2
C select bit.
The E/W parabola is available on pin 24 by the way of an emitter follower which has to be biased by an external
resistor (10K
). It can be DC coupled with external circuitry.
Vertical dynamic focus is combined with horizontal one on output pin 10. Dynamic horizontal phase control current
drives internally the H-position, moving the Hfly position on the horizontal sawtooth in the
1.4% Th both on side
pin balance and parallelogrm.
Vertical
Ramp V
OUT
V
DCMID
(3.5V)
2
+
AMP
EW amp
keystone
sidepin amp
+
Parallelogram
To horizontal
phase
Sidepin balance
output current
EW output
Dynamic focus
I
Parabola
Generator
V.Focus
10
24
Horizontal
Dynamic Focus
+
V
DCMID
(3.5V)
V
DCMID
(3.5V)
23
DEFLECTION PROCESSOR FOR MULTISYNC MONITORS S1D2511B01
31
EW
EWOUT = 2.5V + K1 ( V
OUT
- V
DCMID
)
2
+ K2 ( V
OUT
- V
DCMID
)
K1 is adjustable by EW amplitude I
2
C register
K2 is adjustable by keystone I
2
C register
Dynamic horizontal phase control
IOUT = K3 ( V
OUT
- V
DCMID
)
2
+ K4 ( V
OUT
- V
DCMID
)
K4 is adjustable by side pin balance I
2
C register
K3 is adjustable by parallelogram I
2
C register.
Function
When the synchronisation pulse is not present, an internal current source sets the free running frequency. For an
external capacitor, C
OSC
= 150nF, the typical free running frequency is 100Hz.
Typical free running frequency can be calculated by:
A negative or positive TTL level pulse applied on pin 2 (VSYNC) as well as a TTL composite sync on pin 1 can syn-
chronise the ramp in the range [fmin, fmax]. This frequency range depends on the external capacitor connected on
pin 22. A capacitor in the range [150nF, 220nF]
5% is recommanded for application in the following range: 50Hz
to 165Hz.
Typical maximum and minimum frequency, at 25
C and without any correction (S correction or C correction), can
be calculated by:
f
(Max.)
= 2.5 x f
0
and f
(Min.)
= 0.33 x f
0
If S or C corrections are applied, these values are slighty affected.
If a synchronisation pulse is applied, the internal oscillator is automaticaly caught but the amplitude is no more con-
stant. An internal correction is activated to adjust it in less than a half a second : the highest voltage of the ramp pin
22 is sampled on the sampling capacitor connected on pin 20 at each clock pulse and a transconductance ampli-
fier generates the charge current of the capacitor. The ramp amplitude becomes again constant.
The read status register enables to have the vertical lock-unlock and the vertical sync polarity informations.
It is recommanded to use a AGC capacitor with low leakage current. A value lower than 100nA is mandatory.
Good stability of the internal closed loop is reached by a 470nF
5% capacitor value on pin 20 (VAGC)
f
0
(Hz)= 1.5
10
-5
C
OSC
1
S1D2511B01 DEFLECTION PROCESSOR FOR MULTISYNC MONITORS
32
Figure 18. AGC Loop Block Diagram
I
2
C Control Adjustments
Then, S and C correction shapes can be added to this ramp. This frequency independent S and C corrections are
generated internally. Their amplitude are adjustable by their respective I
2
C register. They can also be inhibited by
their select bit. Endly, the amplitude of this S and C corrected ramp can be adjusted by the vertical ramp amplitude
control register. The adjusted ramp is available on pin 23 (VOUT) to drive an external power stage. The gain of this
stage is typically 25% depending on its register value. The mean value of this ramp is driven by its own I
2
C register
(vertical position). Its value is VPOS = 7/16
V
REF
300mV.
Usually VOUT is sent through a resistive divider to the inverting input of the booster. Since VPOS derives from
V
REF-V
, the bias voltage sent to the non-inverting input of booster should also derive from V
REF-V
to optimize the
accuracy(see Application Diagram).
Basic Equations
In first approximation, the amplitude of the ramp on pin 23 (Vout) is:
V
OUT
- VPOS = ( V
OSC
- V
DCMID
)
( 1 + 0.25 (V
AMP
) )
with:
- V
DCMID
= 7/16
V
REF
( typically 3.5V, the middle value of the ramp on pin 22)
- V
OSC
= V22 ( ramp with fixed amplitude)
- VAMP = - 1 for minimum vertical amplitude register value and +1 for maximum
- VPOS is calculated by : VPOS = V
DCMID
+ 0.3Vp with Vp equals -1 for minimum vertical position register value
and +1 for maximum
The current available on Pin 22 is :
2
SYNCHRO
OSCILLATOR
20
-
+
22
Switch
Dlech
23
+
-
V-SYNC
POLARITY
DISCH.
OSC
CAP
CHARGE CURRENT
TRANSCONDUCTANCE
AMPLIFIER
REF
SAMP
CAP
SAMPLING
S CORRECTION
VS_AMP
SUB07/8bits
COR-C
SUB08/6bits
C CORRECTION
Vlow
18
VERT_AMP
SUB05/7BITS
VMOIRE
SUB0C/5BITS
VOSITION
SUB06/7BITS
VOUT
BREATH
I
OSC
=
V
REF
C
OSC
f
8
3
DEFLECTION PROCESSOR FOR MULTISYNC MONITORS S1D2511B01
33
with C
OSC
: capacitor connected on pin 22
f: synchronisation frequency.
Vertical Moire
By using the vertical moire, VPOS can be modulated from to frame. This function is intended to cancel the fringes
which appear when line to line interval is very close to the CRT vertical pitch. The amplitude pf the modulation is
controlled by register VMOIRE on sub-off via the control bit D7.
DC/DC CONVERTER PART
This unit controls the switch-mode DC/DC con-verter. It converts a DC constant voltage into the B+ voltage
(roughly proportional to the horizontal frequency)necessary for the horizontal scanning. This DC/DC converter can
be configured either in step-up or step-down mode. In both cases it oper-ates very similarly to the well known
UC3842.
Step-up Mode
Operating Description
- The powerMOSisswitched-onduringthe flyback (at the beginning of the positive slope of the horizontal focus
sawtooth).
- The power MOS is switched-off when its current reachesa predeterminedvalue. Forthispurpose, a sense resistor
is inserted in its source. The voltage on this resistor is sent to Pin16 (I
SENSE
).
- The feedback(coming either from the EHV or from the flyback) is divided to a voltage close to 4.8V and com-
pared pared to the internal 4.8V reference(I
VREF
). The difference is amplified by an error amplifier, the output of
which controls the power MOS switch-off current.
Main Features
- Switching synchronized on the horizontal fre-quency,
- B+ voltage always higher than the DC source, - Current limited on a pulse-by-pulse basis.
Step-down Mode
In step-down mode, the Isense information is not used any more and therefore not sent to the Pin16. This mode is
selected by connecting this Pin16 to a DC voltage higher than 6V (for example V
REF-V
).
Operating Description
- The powerMOSis switched-onas for thestep-up mode.
- The feedbackto the error amplifier is done as for the step-up mode.
- The power MOS is switched-off when the HFOCUSCAP voltage get higher than the error amplifier output voltage
Main Features
- Switching synchronized on the horizontal fre-quency,
- B+ voltage always lower than the DC source,
- No current limitation.
S1D2511B01 DEFLECTION PROCESSOR FOR MULTISYNC MONITORS
34
APPLICATION CIRCUIT
1
2
16
15
14
13
12
11
10
9
3
4
5
6
7
8
MC14528
VCC=12V
50K
50K
5V
1K
6.8K
1K
12V
HSYNC
1K
VSYNC
22nF 100V
820pF 50V
1% P
1.8K
+
4.7uF 50V
10nF 100V MP
0.1uF
22K
+
100uF
1uF
820pF
10K
AFC
+
4.7uF
0.1uF
1M
33K
3.3K
50K
22K
100
100
SDA
SCL
+
100uF
10K
HOUT
22K
10K
10K
AFC
150nF 100V
1% P
470nF 63V P
0.1uF
0.1uF
10K
+
47uF
50V
50K
1K
1K
5V
1
2
3
4
SCLK
SCL
SDA
2
3
4
5
6
7
14
13
12
11
10
9
8
1
74HCT125
SDAT
ACK
100K
47pF
HOUT
0.1uF
+
100uF
33pF
10K
AFC
47pF
100K
SDA
31
VCC
29
B+OUT
28
GND
27
XRAY
25
EWOUT
24
VOUT
23
VSCAP
22
H_OUT
26
VAGCCAP
20
BREATH
18
V_REF
21
VGND
19
COMP
14
VSYNC_IN
2
PLL2C
4
CO
5
RO
6
PLL1F
7
HPOSITION
8
HFOCUSCAP
9
H_FOCUS
10
HGND
11
HFLY
12
H_REF
13
REGIN
15
SCL
30
HSYNC_IN
1
5V
32
I_SENSE
16
B+GND
17
H_LOCKOUT
3
KB2511B
S1D2511B