Datasheet

LTC4098/LTC4098-1
11
40981fc
15
5
+ –
+ –
+ – + –
+ –
+
–
+ –
0.1V
UNDERTEMP
AVERAGE INPUT
CURRENT LIMIT
CONTROLLER
OVERTEMP
NTC
NTCBIAS
V
OUT
NTC
T
3
CLPROG
13
V
BUS
2
OVGATE
1
OVSENS
NTC FAULT
D1
NTC ENABLE
16
D2
17
D0
LOGIC
1.188V
+ –
+ + –
AVERAGE OUTPUT
VOLTAGE LIMIT
CONTROLLER
OSC
PWM
S
PWM
4.6V
s2
100mV
6V
OVERVOLTAGE PROTECTION
SUSPEND
LDO
I
LDO
/MI
SWITCH
/N
TO USB
OR WALL
ADPAPTER
Q
R
3.6V
0.3V
1V
100mV
NTC
40981 BD
I
BAT
/1030
+
–
+ –
PROG
7
GND
21
8
11
BAD CELL
CHRG
BAT
BATSENS
SINGLE-
CELL
Li-Ion
OPTIONAL
EXTERNAL
IDEAL DIODE
PMOS
10
IDGATE
12
V
OUT
TO SYSTEM LOAD
ACPR
CONSTANT-CURRENT
CONSTANT-VOLTAGE
BATTERY CHARGER
+
–
0V
15mV
IDEAL DIODE
+ –
BAT + 0.3V 3.6V V
OUT
4.3V
+ + –
+ –
14
SW
19
WALL
NONOVERLAP
AND DRIVE
LOGIC
GND
9
+
V
C
6
4
+–
TO AUTOMOTIVE,
FIREWIRE, ETC.
SW
I
SENSE
V
IN
V
C
V
OUT
HVOK
LT3653
18
20
BLOCK DIAGRAM