MB3875/3877
s
PIN DESCRIPTION
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Symbol
–INC2
IN3
FB2
OUTC2
VREF
–INE2
+INE2
+INE1
FB1
OUTC1
–INE1
–INC1
+INC1
CTL
FB3
–INE3
RT
V
CC
VH
OUT
V
CC
(O)
CS
GND
+INC2
I/O
I
I
O
O
O
I
I
I
O
O
I
I
I
I
O
I
—
—
O
O
—
—
—
I
Descriptions
Current detection amplifier (Current Amp. 2) input pin.
DC/DC output voltage (charge voltage) input pin.
Error amplifier (Error Amp. 2) output pin.
Current detection amplifier (Current Amp. 2) output pin.
Reference voltage output pin.
Error amplifier (Error Amp. 2) inverted input pin.
Error amplifier (Error Amp. 2) non-inverted input pin.
Error amplifier (Error Amp. 1) non-inverted input pin
Error amplifier (Error Amp. 1) output pin.
Current detection amplifier (Current Amp. 1) output pin.
Error amplifier (Error Amp. 1) inverted input pin.
Current detection amplifier (Current Amp. 1) input pin.
Current detection amplifier (Current Amp. 1) input pin.
Power supply control pin.
Setting the CTL pin low places the IC in the standby mode.
Error amplifier (Error Amp. 3) output pin.
Error amplifier (Error Amp. 3) inverted input pin.
Triangular-wave oscillation frequency setting resistor connection pin.
Power supply pin for reference power supply and control circuit.
Power supply pin for FET drive circuit (VH = Vcc
−
5 V).
High-side FET gate drive pin.
Output circuit power supply.
Soft-start capacitor connection pin.
Ground pin.
Current detection amplifier (Current Amp. 2) input pin.
3
FUJITSU [ FUJITSU COMPONENT LIMITED. ]
