MB3887 Datasheet, PDF (4/33 Pages) Fujitsu Component Limited. – DC/DC Converter IC for Charging Li-ion battery

MB3887
■ 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 Amp2) input terminal.
O
Current detection amplifier (Current Amp2) output terminal.
I
Error amplifier (Error Amp2) non-inverted input terminal.
I
Error amplifier (Error Amp2) inverted input terminal.
O
Error amplifier (Error Amp2) output terminal.
O
Reference voltage output terminal.
O
Error amplifier (Error Amp1) output terminal.
I
Error amplifier (Error Amp1) inverted input terminal
I
Error amplifier (Error Amp1) non-inverted input terminal.
O
Current detection amplifier (Current Amp1) output terminal.
With IC in standby mode, this terminal is set to “Hi-Z” to prevent loss
O
of current through output voltage setting resistance.
Set CTL terminal to “H” level to output “L” level.
I
Current detection amplifier (Current Amp1) input terminal.
I
Current detection amplifier (Current Amp1) input terminal.
Power supply control terminal.
I
Setting the CTL terminal at “L” level places the IC in the standby
mode.
O
Error amplifier (Error Amp3) output terminal.
I
Error amplifier (Error Amp3) inverted input terminal.
⎯
Triangular-wave oscillation frequency setting resistor connection
terminal.
⎯
Power supply terminal for reference power supply and control circuit.
O
Power supply terminal for FET drive circuit (VH = VCC − 6 V) .
O
External FET gate drive terminal.
⎯
Output circuit power supply terminal.
⎯
Soft-start capacitor connection terminal.
⎯
Ground terminal.
I
Current detection amplifier (Current Amp2) input terminal.
4