MB3887 View Datasheet(PDF) - Fujitsu

Part Name

Description

Manufacturer

MB3887

DC/DC Converter IC for Charging Li-ion battery

Fujitsu 

MB3887

■ BLOCK DIAGRAM

−INE1 8

OUTC1 10

+INC1 13

−INC1 12

<Current Amp1>

+

× 20

−

+INE1 9

FB1 7

−INE2 4

OUTC2 2

+INC2 24

−INC2 1

<Current Amp2>

+

× 20

−

+INE2 3

FB2 5

−INE3 16

OUTD 11

FB3 15

CS 22

<SOFT>

VREF

10

µA

<Error Amp1>

VREF

−

+

21 VCC (O)

<PWM Comp.>

<OUT>

++

+−

Drive

20 OUT

<Error Amp2>

VREF

−

+

<Error Amp3>

VREF

−

+

+

4.2 V

VCC

Bias

Voltage

<VH>

19 VH

(VCC − 6 V)

2.5 V

1.5 V

<UVLO>

VCC

(VCC UVLO) 215 kΩ

35 kΩ

0.91 V

(0.77 V)

VREF

UVLO

4.2 V

VCC

<OSC>

<REF> <CTL>

45 pF

VREF

bias

5.0 V

17

6

23

RT

VREF GND

18 VCC

14 CTL

4

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