LX2201
TM
®
USB Li-Ion Battery Charger
PRODUCTION DATA SHEET
APPLICATION CIRCUITS
LX2201 CONTROL FLOW DIAGRAM
START
RETURN TO START IF
VIN > VBAT OR VIDX CHANGE STATE.
VDD > VBAT NO
YES
VID0 = 1 NO
YES
VID0 = 1
NO
YES
NO CONDITION
VBAT>60%
CHARGE
MODE
YES
VID0 = 1
NO
YES
D IS C H A R G E
MODE
S W IT C H
OFF
CONSTANT CURRENT
CHARGE MODE
IUSB DETERMINED BY THE
STATE OF VID1.
TEMP < 140
NO
YES
IIN < IUSB
NO
YES
REDUCE
CHARGE
CURRENT
REDUCE
CHARGE
CURRENT
NO
VBAT> VCV
TEMP < 140
NO
YES
IIN < IUSB
NO
YES
NO
IBAT<IMIN
YES
REDUCE
CHARGE
CURRENT
REDUCE
CHARGE
CURRENT
YES
CONSTANT VOLTAGE
CHARGE MODE
VOLTAGE
M O N IT O R IN G
MODE (STATE).
VBAT<97%
NO
YES
RETURN TO THE TOP
OF THE CHART.
Figure 2 – Control Flow Diagram
Copyright © 2000
Rev. 1.2b, 2005-04-13
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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