MAX1538 Datasheet, PDF (11/22 Pages) Maxim Integrated Products – Power-Source Selector for Dual-Battery Systems

Power-Source Selector for
Dual-Battery Systems
SYSTEM LOAD
C_SYS
C_ADAPTER
ADAPTER
R1
FOR RELEARN
MODE ONLY
P1
R2
R3
ACDET
AIRDET
ADPIN
ADPPWR
CHRG
BATSEL
RELRN
STEP-DOWN CHARGER
P2
CHARGER INPUT
R_{SNS IN}
CHARGER OUTPUT
C2
P3
C_CHG
OUT
P7 P6
C_BATB
P8 P5
MAX1538
REVBLK
EXTLD
ADPBLK
LOGIC SUPPLY
D1 D2
C_BATA
CHGIN
CHGA
CHGB
DISB
OUT2
OUT1
OUT0
V_DD
DISA
MINVA
BATB
BATA
BATSUP
GND MINVB
C3
0.1µF
C1
R10
0.1µF
R11
R12
R13
BATTERY B
BATTERY A
Figure 1. Step-Down Typical Application Circuit
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