Diodes API9221 Manuel d'utilisateur télécharger pdf (Page 11)

API9221

R/WALL or USB SUPPLY INPUT LITHIUM BATTERY

CHARGER with OVP USB BYPASS and 10mA LDO

API9221

Document number: DS32204 Rev. 2 - 2

11 of 15

www.diodes.com

November 2011

NEW PRODUCT

Logic State Table

INPUTS OUTPUTS

VDC INPUT

VALID*

VUSB INPUT

VALID*

PPR

CHG

Charging State VDC_LDO USB_BYP

X No No Hi Z Hi Z Off Off Off

HIGH Yes No LOW Hi Z Off On Off

LOW Yes No LOW LOW On (VDC) On Off

HIGH No Yes LOW Hi Z Off Off On

LOW No Yes LOW LOW On (VUSB) Off On

HIGH Yes Yes LOW Hi Z Off On On

LOW Yes Yes LOW LOW On (VDC) On On

* Valid VDC input: VPO

< VDC < OVP

VDC

* Valid VUSB input: VPO

< VUSB < OVP

VUSB

X = don’t care

When the charging state is On, the charge current also depends on the battery terminal voltage as described in the text.

Charging Profile Diagram

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Diodes API9221 Manuel d'utilisateur Page 11