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Datasheet

Datasheet

BM2PXX5F/BM2PXX6F/BM2PXX7F/BM2PXX8F Series

TSZ02201-0F2F0A200210-1-2

28.Oct.2016.Rev.002

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

www.rohm.com

TSZ22111・15・001

（

3-2）VCC charge function

BM2PxxxF has the recharge function.

VCC charge function operates once the VCC pin >V

drops to <V

Through this operation, these series prevent failure.

VCC pin voltage rises until VCC >V

VCC

Switching

VH charge

charge

charge

OUTPUT

voltage

charge charge

AB C D E

F G H

VH

Figure 9. VCC Pin Charge Operation

A: DRAIN pin voltage rises, charges VCC pin through the VCC charge function.

B: VCC > V

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

D: VCC < V

CHG1

E: VCC > V

CHG2

F: VCC < V

G: VCC > V

CHG2

H: After the output voltage is finished rising, VCC is charged by the auxiliary winding, and VCC pin stabilizes.