Diodes API9221 - Manual (Page 11)

API9221
CAR/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
© Diodes Incorporated
NEW PROD
UC
T
Logic State Table
INPUTS OUTPUTS
EN
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 R < VDC < OVP VDC
* Valid VUSB input: VPO R < 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