BD9739KN_10 datasheet(5/15 Pages) ROHM

Part #	BD9739KN

Description	System Switching Regulator ICs with Built-in FET (10V)

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Manufacturer	ROHM [Rohm]

Direct Link	http://www.rohm.com

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5 / 15 page

Technical Note

5/14

www.rohm.com

2010.09 - Rev.A

BD9739KN,BD9740KN

●

Block diagram and application circuit (BD9739KN)

Fig. 2 BD9739KN Application Circuit

The soft start times for CH4,

6, 7 are fixed internally.

(See page 9.)

Set the operating

frequency with the

RT and CT pins.

(See page 8.)

This pin is used as the

on/off control pin.

(See page 7.)

Set whether CH1 and CH5

will be used as step-up,

step-down or inversion.

(See page 7.)

Connect a resistor for

setting the output voltage.

(See page 8.)

Connect a capacitor to prevent

oscillation to the VREF pin.

(See page 7.)

Connect a capacitor to prevent

oscillation to the VREGA pin.

(See page 7.)

For more information

about setting the SCP pin,

(See page 7.)

Apply the PVCCH pin voltage

with an external charge

pump. (See page 4.)

Connect a

capacitor for soft

start at DTC pin.

(See page 8.)

Connect a

capacitor for setting

the soft start time.

(See pages 8& 9.)

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