LTC4006_15 Datasheet, PDF (7/20 Pages) Linear Technology – 4A, High Efficiency, Standalone Li-Ion Battery Charger

BLOCK DIAGRA
LTC4006
0.1µF
V_IN
DCIN
1
INFET
5.8V
Q3
16
ACP/SHDN 3
I_CL
1.105V
708mV
CLN
TIMER/CONTROLLER
RESTART
LOBAT
35mV
25µA
CHG ^100k
2
OSCILLATOR
4 ^RT
R_RT
T_BAD
THERMISTOR
NTC ^32.4k
6
0.47µF
C/10
397mV
GND
5
1.19V
5.1k
R_CL 15nF
CLP
11
CLN
12
–
100mV
CL1
+
g_m = 1.5m^Ω
+
EA
–
g_m = 1m^Ω
20µF
DCIN
OSCILLATOR
WATCH DOG
DETECT t_OFF
OV
1.28V
11.67µA
CA1
3k
BAT
10
R_SENSE
CSP
9
3k
g_m = 1m^Ω
CA2
9k
1.19V
BUFFERED I_TH
÷5
I_TH
7
6.04k
0.12µF
V_LOGIC
10k
NTC
20µF
TGATE
Q1
13
BGATE
Q2
15
PGND
14
L1
S
Q
R
PWM CHARGE
LOGIC
I_REV
–+
I_CMP
17mV
R_IMON1
26.44k
I_MON
8
4.7nF
R_IMON2
52.87k
4006 BD
4006fa
7