MB3882 データシートの表示（PDF） - Fujitsu

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MB3882

2-channel DC/DC Converter IC with Synchronous Rectifier

Fujitsu 

MB3882

s PROCESSING WITHOUT USING THE CS TERIMNALS

When the soft start function is not used, the CS1 terminal (pin 4) and CS2 terminal (pin 22) should be left open.

"Open"

4 CS1

CS2 21

"Open"

< Operation Without Soft Start Setting >

s OSCILLATOR FREQUENCY SETTING

The oscillator frequency can be set by connecting a timing capacitor (CT) to the CT terminal (pin 1) and a timing

resistor (RT) to the RT terminal (pin 2) .

Oscillator frequency

fosc (kHz) =:

893000

CT (pF) •RT (kΩ)

s OUTPUT VOLTAGE SETTING

VO

FB1

6

R1

5

−INE1

R2

4

CS1

Error

− Amp.

+

+

1.25 V

VO = 1.25 V

R2

(R1 + R2)

< CH1, 2 >

20

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