9/18

Datasheet

Datasheet

BM1P061FJ / BM1P062FJ / BM1P101FJ / BM1P102FJ

TSZ02201-0F2F0A200090-1-2

22.NOV.2012.Rev.003

© 2012 ROHM Co., Ltd. All rights reserved.

www.rohm.com

TSZ22111・15・001

（

3-2）VCC Charge function

The VCC charge function operates once the VCC pin >V

drops to <V

By this operation, BM1Pxxx doesn’t occur to start failure.

The VCC pin voltage is rise, then VCC >V

CHG2

VCC

Switching

VH charge

charge

charge

OUTPUT

voltage

charge charge

AB C D E

F G H

VH

Figure 9. Charge operation VCC pin charge operation

A:The VH pin voltage rises, the charge starts to the VCC pin by the VCC charge function.

B:VCC > V

UVLO1

C:When DC/DC operation starts, the VCC voltage drops.

D:VCC < V

E:VCC > V

CHG2

F:VCC < V

CHG1

G:VCC < V

CHG1

H:After a start of output voltage finished, the VCC Pin is charged by the auxiliary winding, then VCC pin stabilizes.