MB3888 Datasheet, PDF (4/30 Pages) Fujitsu Component Limited. – DC/DC Converter IC for Charging Li-ion Battery

MB3888
s PIN DESCRIPTION
Pin No.
1
Symbol
GND
2
RT
3
CTL
4
VREF
5
DTC
6
FB2
7
−INE2
8
+INE2
9
OUTD
10
−INC
11
+INC
12
OUTC
13
+INE1
14
−INE1
15
FB1
16
VCC
17
VH
18
OUT
19
VCC (O)
20
CS
I/O
Descriptions

Ground terminal.

Triangular-wave oscillation frequency setting resistor connection
terminal.
Power supply control terminal.
I
Setting the CTL terminal at “L” level places the IC in the standby
mode.
O
Reference voltage output terminal.
PWM comparator block (PWM) input terminal.
I
Compares the lowest voltage among terminals FB1, FB2, and DTC,
with triangular wave and controls output.
O
Error amplifier (Error Amp2) output terminal.
I
Error amplifier (Error Amp2) inverted input terminal.
I
Error amplifier (Error Amp2) non-inverted input 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 and OUTD terminal to “L” level.
I
Current detection amplifier (Current Amp) input terminal.
I
Current detection amplifier (Current Amp) input terminal.
O
Current detection amplifier (Current Amp) output terminal.
I
Error amplifier (Error Amp1) non-inverted input terminal.
I
Error amplifier (Error Amp1) inverted input terminal.
O
Error amplifier (Error Amp1) output 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.
4