FA7711V Datasheet, PDF (5/25 Pages) Fuji Electric – FUJI Power Supply Control IC

4. Block diagram
⑱ VCC
FA7711V
④ VREF
⑯ CS3 ⑭ CS2 ⑪ CS1
② RT
⑥ IN1+
⑦ IN1-
⑧ FB1
21 IN2+
⑳ IN2-
⑲ FB2
24 IN3+
23 IN3-
22 FB3
Reference
voltge
ＵＶＬＯ
Oscillator
Er.Amp.1
＋
－
Comp.1
＋
－
Er.Amp.2
＋
－
Comp.2
－
＋
Er.Amp.3
＋
－
Comp.3
＋
－
FB voltage
dtection
Timer
latch
Soft
start
PVCC
PVCC
P ch
drive
PGND
PVCC
N/P ch
drive
PGND
PVCC
N/P ch
drive
PGND
⑰ PVCC
⑫ OUT1
⑬ OUT2
⑤ SEL2
⑮ OUT3
③ SEL3
PGND
⑩ PGND
① CP
5. Pin assignment
Pin
Pin
No. symbol
1
CP
2
RT
3
SEL3
4
VREF
5
SEL2
6
IN1+
7
IN1-
8
FB1
9
GND
10 PGND
11
CS1
12 OUT1
13 OUT2
14
CS2
15 OUT3
16
CS3
17 PVCC
18 VCC
19
FB2
20
IN2-
21 IN2+
22
FB3
23
IN3-
24 IN3+
Description
Timer latched short circuit protection
Oscillator timing resistor
Selection of type of driven MOSFET(OUT3)
Reference voltage
Selection of type of driven MOSFET(OUT2)
Ch.1 non-inverting input to error amplifier
Ch.1 inverting input to error amplifier
Ch.1 output of error amplifier
Ground
Ground for driver
Soft start for Ch.1
Ch.1 output
Ch.2 output
Soft start for Ch.2
Ch.3 output
Soft start for Ch.3
Power supply for driver
Power supply
Ch.2 output of error amplifier
Ch.2 inverting input to error amplifier
Ch.2 non-inverting input to error amplifier
Ch.3 output of error amplifier
Ch.3 inverting input to error amplifier
Ch.3 non-inverting input to error amplifier
Fuji Electric Systems Co., Ltd.
AN-060E Rev.1.0
Jun-2010
5
⑨ GND
http://www.fujielectric.co.jp/fdt/scd/