MB3887 View Datasheet(PDF) - Fujitsu

Part Name

Description

Manufacturer

MB3887

DC/DC Converter IC for Charging Li-ion battery

Fujitsu 

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.

3

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