MB3889 데이터 시트보기 (PDF) - Fujitsu

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MB3889

2-Channel DC/DC Converter IC with Overcurrent Protection Symmetrical-Phase Type

Fujitsu 

MB3889

R1

−INE1

1

(CS2) 13

3

CS1

R2

VREF

3 µA

L priority

Error Amp

−

+

+

1.23 V

CTL2

CTL1

Open : CH ON

L : CH OFF

VTH = 1.4 V

100 KΩ

10

Buff

A SW1 (SW2)

9

B

CTL1 = H

6 kΩ

Soft-start

Discharge

<Soft-start circuit>

s TREATMENT OF UNUSED CS TERMINALS

When the soft-start function is not used, the CS1 terminal (pin 3) and CS2 terminal (pin 13) should be left open.

3 CS1

13 CS2

< Operation Without Soft-start Setting >

19

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