MB3874 Datasheet, PDF (4/28 Pages) Fujitsu Component Limited. – DC/DC Converter IC for Parallel Charging

MB3874/MB3876
s PIN DESCRIPTION
Pin No. Symbol
I/O
1
–INC1
I
2
FB2
O
3
–INE2
I
4
+INE2
I
5
VREF
O
6
CTL
I
7
FB1
O
8
–INE1
I
9
+INE3
I
10
–INE3
I
11
FB3
O
12
–INC2
I
13
+INC2
I
14
–INE5
I
15
FB4
O
16
–INE4
I
17
RT
—
18
OUTM
O
19
VH
O
20
OUT
O
21
VCC
—
22
CS
—
23
GND
—
24
+INC1
I
Descriptions
Output voltage feedback input pin.
Error amplifier (Error Amp. 2) output pin.
Error amplifier (Error Amp. 2) inverted input pin.
Error amplifier (Error Amp. 2) non-inverted input pin.
Input pin for charge current setting voltage
Reference voltage output pin.
Power supply control pin.
Setting the CTL pin low places the IC in the standby mode.
Error amplifier (Error Amp. 1) output pin.
Error amplifier (Error Amp. 1) inverted input pin
Input pin for dynamically-controlled charging voltage setting
Error amplifier (Error Amp. 3) non-inverted input pin.
Input pin for charge current setting voltage
Error amplifier (Error Amp. 3) inverted input pin.
Error amplifier (Error Amp. 3) output pin.
Output voltage feedback input pin.
Current detection amplifier (Current Amp. 2) input pin .
Error amplifier (Error Amp. 5) inverted input pin.
Error amplifier (Error Amp. 4, 5) output pin.
Error amplifier (Error Amp. 4) inverted input pin.
Triangular-wave oscillation frequency setting resistor connection pin.
Output pin for dynamically controlled charging identification signal
“H” level: Constant-voltage or constant-current charging mode
“L” level: Dynamically controlled charging mode
Power supply pin for FET drive circuit (VH = Vcc − 5 V).
High-side FET gate drive pin.
Power supply pin for reference power supply and control circuit.
Soft-start capacitor connection pin.
Ground pin.
Current detection amplifier (Current Amp. 1) input pin .
4