LTC4055-1_15 Datasheet, PDF (10/24 Pages) Linear Technology – USB Power Controller and Li-Ion Charger

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