Datasheet

MAX1925/MAX1926
Switch-Mode 1-Cell Li+ Chargers
_______________________________________________________________________________________ 9
HV
DRIVER
10mA
4.5V FOR MAX1926
4.25V FOR MAX1925
6.1V
INP
PGND
REF
REF/10
D3
LED
POWER
SOURCE
REF/8
PREQUAL1
4mA
I > 12%
REF
REF
REF
REF
REF
BATT > 4.35V
BATT > 3V
BATT > 2V
ACON
R
SET
0.14Ω
L1
10µH
REGULATOR
3V_ANA
3V_DIG
IN
ACON
STATE
MACHINE AND
TIMERS
OSC
ACON
IN INP EXT
CS
PGND
GND
EN
BATT
BATT > 2V
TEMP FAULT
REF
353µA
49µA
THRM
10kΩ
MAX1925 ONLY
CHG
ACON
D1
C3
10µF
Q1
D2
C2
10µF
C2
0.1µF
MAX1925
MAX1926
Figure 1. Functional Diagram