Rainbow Electronics MAX1538 - Manual (Page 12)

MAX1538
Power-Source Selector for
Dual-Battery Systems
12 ______________________________________________________________________________________
MAX1538
REVBLK
DISA
DISB
BATB
CHGB
CHGA
CHGIN
ADPIN
DISBAT
BATTERY A BATTERY B
AIRDET
ACDET
OUT
MINVA
MINVB
GND
V DD
CHRG
BATSEL
RELRN
OUT2
OUT1
OUT0
BATA BATSUP
ADAPTER
ADPPWR
R1 R2 + R3
P1
IN
P2
P4
P5
P6 P7
P8
STEP-UP CHARGER
C SYS
C2
FOR RELEARN
MODE ONLY
C BATB
C BATA
D1
D2
R10
R11
R12
R13
C1
1µF
LOGIC SUPPLY
CHARGER OUTPUT
C ADAPTER
C3
0.1µF
CHARGER INPUT
C CHG
EXTLD
ADPBLK P3
EXTERNAL AC/AIR-
DETECTION CIRCUIT
OUT
SYSTEM LOAD
Figure 2. Typical Application Circuit for Step-Up/Step-Down Charger