TA1307P
2002-02-12
1
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA1307P
Integrated Circuit For Standby Power-Supply Control
TA1307P is a switching power-supply IC used as a standby
power-supply control such as small power-supply.
This IC, Slight power-supply can do that a MOSFET is
controlled in intermittent, and this IC is optimum IC as objects
for power-supply control, such as color TV, monitor, VCR, DVD,
FAX, printer, etc.
Main Characteristics
Burst mode PWM pulse output
The over current protection circuits to power MOSFET for a
drive are built in.
UVLO (Under Voltage Lock Out), OVLO (Over Voltage Lock
Out) with Latch, OVLO on/off function
OCL (Over Current Limmiter),
Select SW for IC active/IC not active are built in.
The starting current until UVLO is canceled about 100 A.
Wide range input voltage: (85 V to 264 V).
Weight: 0.5 g (typ.)
TA1307P
2002-02-12
2
Stand Power Supply Application Circuit Example
(voltage detection by 2nd side)
FB IN
OSC Wave
expansion
PULSE
Output
FB IN
(V
out
)
PULSE
Output
3 V (fix)
2.5 V (fix)
=
Upper limit DC for FB comparator
=
Lower limit DC for FB comparator
Figure 1 Movement Explain
0.01
m
F
Pin2 (OSC establish)
Outside resistance use
2%
Hi: Standby OFF mode
...IC not active
Low: Standby ON mode (OVLO off) ...IC active
Open: Standby ON mode (OVLO on) ...IC active
7
8
GND1
OS
C e
s
t
abl
i
s
h
Standby ON/OFF
Pulse output
Output stop
UVLO
7 V/5 V
OSC
5
6
2
1
4
3
OCL
P
u
l
s
e
out
GND2
S
t
andby S
W
FB
Band
gap
UVLO
12 V Latch
20
m
F
0.01
m
F
3 V (pulse output stop)
/2.5 V (pulse output start)
0.2 V
V
cc
V
out
TA1307P
2002-02-12
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With outputting burst switching control pulse from IC, burst enegize of the TRANS is carried out.
Voltage stabilized also at the time of a light load can be supplied.
It is the optimum IC for constituting the power-supply system for minute electric-power supply.
By this IC, the burst time of switching control pulse is decided by level of output ripple of a power-supply system.
As for the terminal 4 which is carrying out the monitor of the power-supply output-voltage value, another side is
connected to the comparator.
The standard voltage value of this comparator has hysterisis, 2.5 V and 3 V fixation. (inside IC)
Since output DC voltage of a power supply is stabilized, power-supply output voltage is detected and it feedbacks
for the terminal 4 (FB IN terminal).
When the voltage value of a terminal 4 tends to become more than 3 V, switching control pulse of a terminal 7
(pulse out) is stopped.
If pulse is stooped, in order not to control power-supply TRANS, it will stop supplying energy supplied to the output
of a power supply, and the output DC voltage of a power-supply will descend.
If output DC voltage tends to become less than (V/2.5), switching control pulse of a terminal 7 (pulse out) will be
outputted.
Power-supply TRANS is made to drive and PULSE supplies energy to a power-supply output.
Then, output DC voltage rises.
Burst electric supply is realized by repeating the above-mentioned operation.
Hereafter, calculation using ripple level as an example
Voltage of V
out
and the terminal 2 is set output DC voltage to V
ref
.
V
out
= V
z
+ V
F
+ 1/CTR R2/R1 V
ref
*CTR = I
C
/I
F
*I
Z
= I
F
+ I
S
, R3 is set up.
For example, R1 = 10 kW, R2 = R3 = 1 kW, CTR = about 1, V
z
= 3.9 V, V
F
= 0.7 V
V
ref
(minimum) = 2.5 V fixation and V
ref
(maximum) = 3 V fixation.
Calculation
V
out
(minimum) = 4.85 V
V
out
(maximum) = 4.9 V.
Ripple in an output is 0.05 V.
Internal oscillation circuit for obtaining output PULSE is built in.
Oscillation frequency of output PULSE can be set up by outside attachment resistance to a terminal 2.
Duty about 50% of output PULSE has been obtained.
Oscillation frequency is calculation from f = i/2 CV (Hz), I = 1 (V) /R/10, and it will be set to 25 kHz, if 20 kW is
attached to a terminal 2 outside.
Terminal voltage and R are outside attachment resistance in 1 (V).
10 is a current ratio, sets current of a terminal 2 to 1/10, and makes it the charge/discharge current of a internal
50 pF capacitor. C = 50 (pF) (built-in capacitor value) V = 2 (V) (oscillation amplitude)
Figure 2 Ripple Voltage Establish
(example)
4
V
out
V
cc
I
C
Is
I
F
I
z
R2
FB
R1
R3
V
z
=
3.
9
V
V
F
FB comparater
V
ref
2.5 V/3 V
TA1307P
2002-02-12
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In addition, there is a function below as a PROTECT circuits.
A terminal 5 (OCL) detects the overcurrent of MOSFET connected to the terminal 7 (pulse out), and output Pulse
is made to compulsion low at the time of an overcurrent.
Output pulse will be made to compulsion low, if it flows into a terminal 7 (pulse out) and there is always 40 mA or
more of current.
Output pulse will be made to compulsion low, if the supply voltage of a terminal 1 (V
CC
) becomes more than
12 V.(OVLO)
Circuit operation start of the UVLO function is carried out more than by 7 V, and it carries out a circuit operation
stop less than 5 V.
Pin Connection
(top view)
Maximum Ratings
(Ta
=
=
=
=
25C)
Characteristics Symbol
Rating
Unit
Supply Voltage
V
CC
max
14
V
Maximum Input Voltage
V
IN
max
V
CC
+
0.3
V
Minimun Input Voltage
V
IN
min
GND
-
0.3
V
Power Dissipation
(Note 1)
P
D
max
817
mW
Operating Temperature
T
opr
-
25~85 C
Storage Temperature
T
stg
-
55~150 C
Note 1: Derated above Ta
=
25C in the proportion of 6.5 mW/C
1
2
3
4
8
7
6
5
V
CC
OSC establish
Standby SW
FB IN
GND2
Pulse OUT
GND1
OCL
Pin2 (OSC establish)
Outside resistance use
2%
TA1307P
2002-02-12
5
Recommended Operating Condition
Characteristics
Pin
No.
Min
Typ.
Max
Unit
Power Supply Voltage
1
7.5
11.5
V
Electrical Characteristics
DC Characteristics
(There is no designation V
cc
=
=
=
=
9 V, Ta
=
=
=
=
25C)
(reference:
a measurement circuit is figure 4)
Characteristics Symbol
Pin
No.
Test Condition
Min
Typ.
Max
Unit
Power Current (9 V)
I1Load
1
Load of 100 pF is connected with Pin7.
SW1
=
ON, SW2
=
b, SW3
=
a
0.8 1.2 1.6 mA
Power Current (9 V)
I1on
1
Pin3
=
Low voltage input
(standby ON mode)
SW1
=
ON, SW2
=
b, SW3
=
b
0.39 0.55 0.72
mA
Power Current (9 V)
I1off
1
Pin3 = Hi voltage input
(standby OFF mode)
SW1
=
Open, SW2
=
a, SW3
=
b
0.05 0.09 0.13
mA
V3th L
(Note 2)
0.7 0.5
Pin3 Threshold Voltage
V3th H
3
(Note 3)
0.9
0.7
V
Note 2: V3 th L is threshold voltage "Standby ON (IC active) mode"
Note 3: V3 th H is threshold voltage "Standby OFF (IC not active) mode"
Ta (
C
)
P
o
w
e
r
di
ssi
p
a
ti
on
P
D
(
m
W
)
0
817
25 85
150
425
Figure 3 P
D
-
-
-
-
Ta Curve
TA1307P
2002-02-12
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Figure 4 DC Terminal Voltage Measurement Circuit
Pin2 (OSC establish)
Outside resistance use
2%
a: Standby OFF mode
...IC not active
b: Standby ON mode (OVLO off)
...IC active
open: Standby ON mode (OVLO on) ...IC active
V
CC
OS
C e
s
t
abl
i
s
h
S
t
andby S
W
FB IN
GND2
P
u
l
s
e
out
GND1
OCL
8
7
6
5
1
2
3
4
SW3
b
a
0.01
m
F
open
9 V
43 k
W
b
a
0.01
m
F
20 k
W
150 k
W
SW1
SW2
20
m
F
100 pF
TA1307P
2002-02-12
7
AC Characteristics
(there is no designation V
CC
=
=
=
=
9 V, Ta
=
=
=
=
25C)
(refer: Next page AC characteristic measurement, Figure 5 AC characteristic measurement
circuit)
Characteristics Symbol
Measurement Method No.
Min Typ. Max
Unit
VUL
4.6 5.0 5.5
UVLO Movement Voltage
VUH
1
6.6 7.0 7.4
V
Start Up Current
Istrt
2
30
55
90
m
A
Triangle Wave Oscillate Frequency
(temperature margin
-
0.016% is
contained)
FOSC
3
20.2 25.0 29.8
kHz
Output Pulse Rise Time
(reference data)
TRPF 4
50
100
160
ns
Output Pulse Fall Time
(reference data)
TSPF 5
50
100
160
ns
Output
Pulse
Max.
Voltage
VOPFMX
6
7.0 7.5 8.0 V
Output Pulse Min. Voltage
VOPFMN
7
-
0.1 0.1 0.65
V
Output Current
(source, sink)
(reference data)
IOPFC
8
27.0 40.0 53.0
mA
Output Terminal (pin7)
PROTECT Movement Current
V7pt
V7pt 9
30.0
40.0
mA
FB IN Terminal (pin4)
FB Comparator THRESHOLD
Hi Voltage
Vth4H
10
2.9 3.0 3.1 V
FB IN Terminal (pin4)
FB Comparator THRESHOLD
Low Voltage
Vth4L
11
2.4 2.5 2.6 V
OCL Terminal (pin5)
PROTECT Movement Current
V5pt 12
0.18
0.2
0.22
V
V
CC
Terminal (pin1)
OVLO Movement Voltage
V1ovlo
13
11.5 12.0 12.5
V
Standby SW Terminal (pin3)
Movement Voltage
I
StSW
14
0.5 0.7 0.9 V
FB IN Terminal (pin4)
Input Current
I
FBIN
15
0.08 0.15 0.30
m
A
TA1307P
2002-02-12
8
AC Characteristics Measurement
(there is no designation V
CC
=
=
=
=
9 V, Ta
=
=
=
=
25C)
(refer: Figure 5 AC characteristic measurement circuit)
SW mode
No. Characteristics
1 2 3 4
Test Condition
1
UVLO movement voltage
(VUL/VUH)
b b a a
Pin4 (FB IN)
=
GND
Confirm pin7 (pulse out) pulse is output.
Vcc voltage is lowered, and measure V
cc
voltage when pin7 output pulse
disappears.(VUL)
And Vcc voltage is upped, and measure V
cc
voltage when pin7 output pulse
appears.(VUH)
2
Start Up Current
b b a a
Pin4 (FB IN)
=
GND
Input voltage Vcc
<
5.0 V
(
=
pin7 pulse is not outputted)
And Vcc voltage is upped (V
cc
=
9V)
Measure source current through V
cc
(I strt).
3
Triangle Wave Oscillate Frequency
b b a a
Pin4 (FB IN)
=
GND
Confirm pin7 (pulse out) pulse is output.
Measure pulse period, look for frequency.
(F
osc
)
4
Output Pulse Rise Time
(reference data)
b b a a
Above condition, measure pulse rise time
:pulse amplitude 10% to 90% (TRPF)
5
Output Pulse Fall Time
(reference data)
b b a a
Above condition, measure pulse fall time
:pulse amplitude 10% to 90% (TSPF)
6
Output Pulse Max. Voltage
b b a a
Above condition, measure pulse Max. voltage.
(VOPMX)
7
Output Pulse Min. Voltage
b b a a
Above condition, measure pulse Min. voltage.
(VOPMN)
TA1307P
2002-02-12
9
AC Characteristics Measurement
(there is no designation V
CC
=
=
=
=
9 V, Ta
=
=
=
=
25C)
(refer: Figure 5 AC characteristic measurement)
SW mode
No.
Characteristics
1 2 3 4
Test Condition
8
Output Current
(source, sink)
(reference data)
b b a b
Measure pin7 (pulse out) current for using
current probe.
9
Output Terminal (pin7)
PROTECT Movement Current
b b a c
Increase DC voltage for pin7 (FB IN) through
resistance (100
W
), pin7 pulse is made to
output. pin7 DC voltage is upped, and
measure pulse highest level voltage and
increase DC voltage (V6) when pin7 pulse
duty is began to become short. i7 pt is
calculated by bottom type.
I7pt
=
(pulse highest level voltage
-
V6 DC
voltage) /100
W
10
FB IN Terminal (pin4)
FB Comparator THRESHOLD
Hi Voltage
b a a a
11
FB IN Terminal (pin4)
FB Comparator THRESHOLD
Low Voltage
b a a a
Increase DC voltage for pin4 (FB IN) (early
value is 2.0 V) pin7 pulse is made to output.
Pin4 DC voltage is upped, and measure pin4
voltage when pin7 pulse disappears. (Vth4H)
And Pin4 DC voltage is lowered, and measure
pin4 voltage when pin7 pulse appears.(Vth4L)
12
OCL Terminal (pin5)
PROTECT Movement Current
b b a a
Pin4 (FB IN)
=
GND. Confirm pin7 (pulse out)
pulse is output.
Pin5 (OCL) connect outside power supply.
Pin5 DC voltage is upped, and measure pin5
voltage when pulse disappears.
13
Vcc Terminal (pin1)
OVLO Movement Voltage
d b a a
Pin4 (FB IN)
=
GND
Confirm pin7 (pulse out) pulse is output.
Pin1 (Vcc) DC voltage is upped, and measure
Vcc voltage when pulse
disappears.(V1OVLO)
14
Standby SW Terminal (pin3)
Movement Voltage
c b a a
Pin4 (FB IN)
=
GND
Confirm pin7 (pulse out) pulse is output.
Pin3 (standby SW) connect outside power
supply.
Pin3 DC voltage is upped (early value is 0 V),
and measure pin3 voltage when pulse
disappears.
15
FB IN Terminal (pin4)
Input Current
b c a a
Pin4 (FB IN) connect outside power supply
(3.5 V).
Measure pin4 current.
TA1307P
2002-02-12
10
SW4
SW1
A
20
m
F
0.01
m
F
Pin2 (OSC establish)
Outside resistance use
2%
a: Standby OFF mode
...IC not active
b: Standby ON mode (OVLO off)
...IC active
open: Standby ON mode (OVLO on) ...IC active
V
CC
OS
C e
s
t
abl
i
s
h
S
t
andby S
W
FB IN
GND2
P
u
l
s
e
out
GND1
OCL
8
7
6
5
1
2
3
4
b
a
9 V
b
a
20 k
W
Figure 5 AC Characteristics Measurement Circuit
SW3
100k
W
V6
V5
c
a
b
510 p
0.01
m
F
A
d
c
SW2
a
b
c
V1
V4
V2
V3
TA1307P
2002-02-12
11
Package Dimensions
Weight: 0.5 g (typ.)
TA1307P
2002-02-12
12
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000707EBA
RESTRICTIONS ON PRODUCT USE
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