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Электронный компонент: FAN7544M

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2004 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.0
Features
Low Start-up and Operating Current : 140
A, 6.5mA
Under Voltage Lock Out With 1.9V of Hysteresis
600mA of Totem Pole Output with High State Clamp
Trimmed 1.5% Internal Bandgap Reference
Programmable Preheat Time & Frequency
Programmable Run Frequency
High Accuracy Oscillator
Descriptions
The FAN7544 provides simple and high performance elec-
tronic ballast control functions. The FAN7544 is optimized
for electronic ballast requiring a minimum board area, by
reducing component counts and lowering power dissipation.
The features include programmable preheating time and fre-
quency and programmable run frequency. The initial pre-
heating time and frequency can be adjusted according to the
types of lamps using the CPH, CT and RPH. Output gate
driver circuit clamps power MOSFET gate voltage to the
supply voltage.
Internal Block Diagram
FAN7544
Simple Ballast Controller
8-DIP
8-SOP
1
1
GND
Latch
1.9V
C
PH
Vcc
R
PH
R
T
OUT1
UVLO
11.6V
1
3
6
4
7
Vcc
Vcc
Frequency
Divider
Q
2
5.2V
1.5V
Oscillator
6.25Ict
Ict
Irt=Vref/Rt
C
T
OUT2
Iph=Vref/Rph
Current
Source
Current
Source
2.9V
2.9V
Irt
5V
Iph - Irt
1
2.1
5V
2V
Shutdown signal
+
-
Bias
Current
9V Vsup
TSD
+
-
V
CPH
5V
8
Vz
5
R
Q
S
Q
10
A
1.
6
A
R
S
FAN7544
2
Pin Assignments
Pin Definitions
Pin Number
Pin Name
Pin Function Description
1
RPH
Preheat frequency set resistor
2
C
T
Oscillator frequency set capacitor
3
RT
Oscillator frequency set resistor
4
CPH
Preheat time set capacitor
5
GND
Ground
6
OUT2
Gate drive output 2
7
OUT1
Gate drive output 1
8
V
CC
Supply voltage
1
2
3
4
8
7
6
5
CPH
CT
RT
RPH
VCC
OUT1
OUT2
GND
FA
N7544
YW
W
YWW : Work Week Code
FAN7544
3
Absolute Maximum Ratings
Temperature Characteristics (-25
C Ta 125C)
Parameter
Symbol
Value
Unit
Supply Voltage
V
CC
30
V
Peak Drive Output Current
I
OH
, I
OL
600
mA
Output Drive Clamping Diode Current
Iclamp
10
mA
CPH, CT, RT, and RPH Pins Input Voltage
V
IN
-0.3 to 6
V
Operating Temperature Range
Topr
-25 to 125
C
Storage Temperature Range
Tstg
-65 to 150
C
Power Dissipation
8-DIP
Pd
0.8
W
8-SOP
0.5
Thermal Resistance (Junction-to-Air)
8-DIP
R
ja
100
C/W
8-SOP
165
Parameter
Symbol
Value
Unit
Temperature Stability for Operating Frequency (fos)
fos(Typ)
3
%
FAN7544
4
Electrical Characteristics
Unless otherwise specified, for typical values Vcc=15V, Ta=25
C
, For Min/Max values Ta is the operating ambient
temperature range with
-25
C Ta 125C and 12.7V V
CC
30V
Note:
1. These parameters, although guaranteed, are not 100% tested in production.
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
UNDER VOLTAGE LOCK OUT SECTION
Start Threshold Voltage
V
TH(st)
V
CC
Increasing
10.5
11.6
12.7
V
UVLO Hysteresis
HY
(st)
-
1.4
1.9
2.4
V
SUPPLY CURRENT SECTION
Start Up Supply Current
I
ST
V
CC
< V
TH
(st)
-
0.14
0.2
mA
Operating Supply Current
I
CC
Output not switching
-
6.5
10
mA
Dynamic Operating Supply Current
I
DCC
50kHz, C
L
=1nF
-
8
12
mA
OSCILLATOR SECTION
CPH Pin Charging Current 1
I
CPHL
V
CPH
=2V
1.3
1.6
1.9
A
CPH Pin Charging Current 2
I
CPHH
V
CPH
=4V
7
10
13
A
CPH Pin Clamp Voltage
V
CLAMP
-
4.8
5.6
6.4
V
Preheating Frequency
f
PH
V
CPH
=0V,
RPH=47k
, CT=470pF
70
81.5
93
kHz
Preheating Dead Time
tpd
V
CPH
=0V,
RPH=47k
, CT=470pF
0.8
1.3
1.8
s
Operating Frequency
f
OS
V
CPH
=Open,
RT=80k
, CT=470pF
45.5
50
54.5
kHz
Operating Dead Time
t
OD
V
CPH
=Open,
RT=80k
, CT=470pF
1.6
2.0
2.4
s
CT Threshold Voltage
(note1)
V
CT
Ta=25C
3.2
3.7
4.2
V
CT Charging Current
I
CHG
-
170
220
270
A
CT Discharging Current
I
DIS
-
0.9
1.15
1.4
mA
Temperature Stability
(Note1)
f/T
-25C
Ta 125C,
V
CC
= 25V
-
1
3
%
Voltage Stability
f/V
12.7V
V
CC
30V, Ta=25C
-
-
3
%
OUTPUT SECTION
Gate Driver Source Current
(note1)
I
OSOURCE
V
OUT
=0V
-
500
-
mA
Gate Driver Sink Current
(note1)
I
OSINK
V
OUT
=14.6V
-
500
-
mA
Rising Time
(Note1)
tr
C
L
=1nF, Vcc=15V, Ta=25C
-
130
170
ns
Falling Time
(Note1)
tf
C
L
=1nF, Vcc=15V, Ta=25C
-
50
100
ns
Maximum Output Voltage
V
omax
V
CC
= 25V
13
15
17
V
Output Voltage With UVLO Activated
V
omin
V
CC
= 5V, I
O
= 100
A
-
-
1
V
PROTECTION SECTION
Shutdown Sink Current
(note1)
I
SD
RPH=47k
-
0.6
-
mA
Latch Mode Quiescent Current
I
LATCH
V
CC
= 15V
-
0.36
0.57
mA
Thermal Shutdown Junction
Temperature
(Note1)
T
SD
-
-
150
-
C
FAN7544
5
Typical Characteristics
Figure 1. UVLO
-60
-40
-20
0
20
40
60
80
100
120
140
4
5
6
7
8
9
10
Current [m
A]
Temperature [C]
idcc @VCC=30V
idcc @VCC=15V
idcc @VCC=12.5V
-60
-40
-20
0
20
40
60
80
100
120
140
4
5
6
7
8
9
10
Current [m
A]
Temperature [C]
idcc @VCC=30V
idcc @VCC=15V
idcc @VCC=12.5V
idcc @VCC=30V
idcc @VCC=15V
idcc @VCC=12.5V
0
5
10
15
20
25
30
-0.001
0.000
0.001
0.002
0.003
0.004
0.005
0.006
0.007
0.008
Idcc[A]
Vcc[V]
0
5
10
15
20
25
30
-0.001
0.000
0.001
0.002
0.003
0.004
0.005
0.006
0.007
0.008
Idcc[A]
Vcc[V]
-60
-40
-20
0
20
40
60
80
100
120
140
7.0
7.5
8.0
8.5
9.0
9.5
10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
V
o
l
t
age [
V
]
Temperature [C]
UV+
UV-
-60
-40
-20
0
20
40
60
80
100
120
140
7.0
7.5
8.0
8.5
9.0
9.5
10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
-60
-40
-20
0
20
40
60
80
100
120
140
7.0
7.5
8.0
8.5
9.0
9.5
10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
V
o
l
t
age [
V
]
Temperature [C]
UV+
UV-
-60
-40
-20
0
20
40
60
80
100
120
140
3
4
5
6
7
8
9
C
u
rren
t [mA]
Temperature [C]
icc @VCC=30V
icc @VCC=15V
iccl @VCC=12.5V
-60
-40
-20
0
20
40
60
80
100
120
140
3
4
5
6
7
8
9
C
u
rren
t [mA]
Temperature [C]
icc @VCC=30V
icc @VCC=15V
iccl @VCC=12.5V
-60
-40
-20
0
20
40
60
80
100
120
140
47
48
49
50
51
52
53
Rt=80k
, Ct=470p
fosc
[kH
z
]
Temperature [C]
-60
-40
-20
0
20
40
60
80
100
120
140
47
48
49
50
51
52
53
Rt=80k
, Ct=470p
fosc
[kH
z
]
Temperature [C]
Figure 2. Dynamic Operating Current
Figure 4. Operating Current
Figure 3. UVLO Hysteresis
Figure 5. Switching Frequency