Rainbow Electronics MAX1538 - Manual (Page 11)

MAX1538
Power-Source Selector for
Dual-Battery Systems
______________________________________________________________________________________ 11
MAX1538
REVBLK
DISA
DISB
BATA
BATB
CHGB
CHGA
CHGIN
ADPIN
EXTLD
ADPBLK
BATTERY A BATTERY B
AIRDET
ACDET
MINVA
MINVB
V DD
CHRG
BATSEL
RELRN
OUT2
OUT1
OUT0
GND BATSUP
ADAPTER
ADPPWR
R1 R2 R3
P1
IN
P2
P3
P5
P6 P7
P8
STEP-DOWN CHARGER
C SYS
C CHG
C2
FOR RELEARN
MODE ONLY
C
BATB
C
BATA
D1 D2
R10
R11
R12
R13
C1
0.1µF
LOGIC SUPPLY
R SNS SYSTEM LOAD
CHARGER OUTPUT
C ADAPTER
C3
0.1µF
CHARGER INPUT
OUT
Figure 1. Step-Down Typical Application Circuit