Datasheet

LTC4055/LTC4055-1
10
4055fb
BLOCK DIAGRAM
SOFT-START
I
LIM
CNTL
ENABLE
CHARGER
CC/CV REGULATOR
ENABLEI/O SEL
0.25V
–
+
–
+
–
+
–
+
15
2COLD
NTC
BATTERY CHARGER
CURRENT LIMIT
2HOT
0.1V
NTC ENABLE
V
NTC
ACPR
5
WALL
16
NTC
100k
100k
100k
–
+
1V
8
HPWR
11
PROG
1V
500mA/100mA
2μ
13
–
+
–
+
–
+
–
+
100k
9
3 2
CLPROG
1V
CURRENT CONTROL
CONTROL LOGIC
VOLTAGE DETECT
COUNTER
OSCILLATOR
TA
DIE
TEMP 105°C 4.35V
VR
SENSE
I
LIM
I
CHRG
SOFT-START2
2.8V
BATTERY
UVLO
4.1V
RECHARGE
(4.0V
LTC4055-1)
UVLO
IN1 OUT BAT
BAT UV
BAT UV
RECHRG
HOLD
RESETNTCERR
CLK
–
+
–
+
6 7
2μ
SHDN
10
GND SUSP
2μ
0.2Ω 0.2Ω
25mV
IDEAL
DIODE
0.2Ω
OUT
4
IN1
IN1 OUT BAT IN2
V
BUS
BAT
1
IN2
+
–
12
TIMER
14
CHRG
STOP
4055 BD