Datasheet

LTC4098-3.6
13
409836f
+ –
+ + –
0.4V
1.188V 3.5V
CLPROG
I
SWITCH
/N
+
–
+
–
15mV
OmV
IDEAL DIODE
PWM AND
GATE DRIVE
AVERAGE INPUT
CURRENT LIMIT
CONTROLLER
AVERAGE OUTPUT
VOLTAGE LIMIT
CONTROLLER
CONSTANT-CURRENT
CONSTANT-VOLTAGE
BATTERY CHARGER
+ –
3
IDGATE
10
V
OUT
12
SW
3.1V TO (BAT + 0.4V) TO SYSTEM LOAD
OPTIONAL EXTERNAL IDEAL DIODE PMOS
SINGLE-CELL LiFePO
4
40981 F01
14
BAT
11
BATSENS
FROM USB
OR WALL
ADAPTER
13
+
2
OVGATE V
BUS
OVSENS
TO AUTOMOTIVE,
FIREWIRE, ETC.
ACPR
BAT + 0.4V 3.6V V
OUT
4.3V
+ + –
+ –
19
WALL
Bat-Track HV CONTROL
18
V
C
20
SW
I
SENSE
V
IN
V
C
V
OUT
HVOK
LT3653
6
×2
6V
OVERVOLTAGE PROTECTION
+
–
+–
1
USB INPUT BATTERY POWER HV INPUT
Figure 1. Simplified Power Flow Diagram
OPERATION