RH5RI251B Ver la hoja de datos (PDF) - RICOH Co.,Ltd.

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RH5RI251B

VFM STEP-UP DC/DC CONVERTER

RICOH Co.,Ltd. 

RH5RI

• Step-up/Step-down Circuit with Flyback

Trance1:1

VIN

Diode

RH5RI× ×1B

Lx

OUT

Vss

VOUT

+

Capacitor

(Note) Use a RH5RI××2B,depend on the Output Current.

Starter Circuit

FIG. 8

*The Starter Circuit is necessary for all above circuits.

1.For Step-up Circuit.

Starter Circuit

VIN side

VOUT side

1.For Step-down and Step-up/Step-down Circuit.

VIN side

Starter Circuit

Tr

RST

VOUT side

ZDST

ZDst 2.5V≤ZDST≤Designation of Output Voltage

Rst Input Bias Current of ZDST and Tr.

(several kΩ to several hundreds kΩ)

22

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