MB3878 Datasheet, PDF (3/24 Pages) Fujitsu Component Limited. – DC/DC Converter IC for Charging

MB3878
s PIN DESCRIPTION
Pin No.
1
2
3
4
5
6
7
8
9
10
Symbol
−INC2
OUTC2
+INE2
−INE2
FB2
VREF
FB1
−INE1
+INE1
OUTC1
11
OUTD
12
−INC1
13
+INC1
14
CTL
15
FB3
16
−INE3
17
RT
18
VCC
19
VH
20
OUT
21
VCC (O)
22
CS
23
GND
24
+INC2
I/O
Descriptions
I
Current detection amplifier (Current Amp. 2) input pin.
O Current detection amplifier (Current Amp. 2) output pin.
I
Error amplifier (Error Amp. 2) non-inverted input pin.
I
Error amplifier (Error Amp. 2) inverted input pin.
O Error amplifier (Error Amp. 2) output pin.
O Reference voltage output pin.
O Error amplifier (Error Amp. 1) output pin.
I
Error amplifier (Error Amp. 1) inverted input pin
I
Error amplifier (Error Amp. 3) non-inverted input pin.
O Current detection amplifier (Current Amp. 1) output pin.
With IC in standby mode, this pin is left open to prevent loss of current
O through output voltage setting resistance. Set CTL pin to “H” level and
OUTD pin to “L” level.
I
Current detector amplifier (Current Amp. 1) input pin.
I
Current detector amplifier (Current Amp. 1) input pin.
I
Power supply control pin.
Setting the CTL pin low places the IC in the standby mode.
O Error amplifier (Error Amp. 3) output pin.
I
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.
O
Power supply pin for FET drive circuit (VH = Vcc − 5 V).
O High-side FET gate drive pin.
 Output circuit power supply pin.
 Soft-start capacitor connection pin.
 Ground pin.
I
Current detection amplifier (Current Amp. 2) input pin.
3