Datasheet

LTC4223-1/LTC4223-2
8
422312f
FUNCTIONAL DIAGRAM
+
–
+
–
+
–
UVLO3
9.7V
12V
IN
2.45V
UVLO2
CP2
SYSTEM
CONTROL
AUX FAULT
12V FAULT
CHARGE
PUMP
V
CC
TIMER
FAULT
+
–
+
–
ACL
V
CC
10μA
10μA
1mA
+
–
2.885V
ECB
12V SUPPLY
CONTROL
12V
IN
12V
SENSE
60mV
12PGOOD
12V
OUT
12IMON
12V
GATE
+
–
50mV
+
–
V
CC
10μA
V
CC
V
CC
10μA
V
CC
V
CC
10μA
2μA
200μA
R2
R
OUT
165k
10μA
AUX SUPPLY
CONTROL
AUXON AUX FET ON
GND
AUXIN
AUXPGOOD
MFETRSNS
422312 FD
THERMAL
SHUTDOWN
CHARGE
PUMP
AUX PWRGD
PG1
+
–
10.3V
12V PWRGD
PG2
AUXOUT
+
–
UVLO1
2.5V
0.2V
AUXIN
6.2V
GATE
DRIVER
EN CARD PRESENCE
+
–
A1
12ON 12V FET ON
+
–
1.235V
CP1
R
IN
5k