Datasheet

9
LTC1479
TI I G DIAGRA S
W
W
U
DC and Battery Operation Timing
DCIN
DCINGOOD
DCIN/BAT
BATSEL
MODE 1
DC OPERATION
BAT1 DISCONNECTED
MODE 2
DC OPERATION 
BAT1 CHARGING
CHGSEL
MODE 3
DC OPERATION 
BAT2 DISCONNECTED
MODE 4
DC OPERATION 
BAT2 CHARGING
BATDIS
MODE 5
BAT1 OPERATION
MODE 6
BAT2 OPERATION
NOTE: FOR MODES 1 TO 6, 3DM = H, BAT1 = 16V, BAT2 = 12V
25V
25V
(16V)
(12V)
1479 TD01
0V
OUTPUT
0V
Backup and DC Restoration Timing
DCIN
MODE 7
BAT1 LOW &
DISCONNECTED
MODE 8
BACKUP
OPERATION
MODE 9
NO POWER
(NO BACKUP)
MODE 10
DC RESTORED
(THREE DIODE MODE)
BATDIS
MODE 11
DC RECONNECTED
(SW A/B ON)
MODE 12
THREE DIODE MODE
NOTE: FOR MODES 7 TO 12, BATSEL = H, BAT1 = 16V AND DISCHARGING, BAT2 = 0V
25V
25V
0V
OUTPUT
0V
DCIN/BAT
3DM
LOBAT
BAT1
DISCHARGING
(V
BKUP
= 6V)
(0V)
(24.3V) (24.3V)
1479 TD02
(25V)