LTC4007_15 Datasheet, PDF (8/24 Pages) Linear Technology – 4A, High Effi ciency, Standalone Li-Ion Battery Charger

LTC4007
BLOCK DIAGRAM
0.1μF
V_IN
DCIN
1
INFET
5.8V
Q3
23
ACP 3
SHDN 24
FAULT 5
FLAG 17
GND
6
3C4C 7
CHEM 16
CLN
MUX
TIMER/CONTROLLER
OSCILLATOR
2 CHG
4 ^RT
R_RT
RESTART
TBAD
THERMISTOR
NTC ^32.4k
9
0.47μF
10k
NTC
397mV
C/10
35mV
11.67μA
BAT ^3k
15
–
LOBAT 8
708mV
1.19V
5k
R_CL 15nF
CLP
18
–
100mV
CL1
CLN
19
+
g_m = 1.4m
1.105V
+
+
EA
–
g_m = 1m
I_CL 13
DCIN
OSCILLATOR
WATCHDOG
20μF
DETECT t_OFF
+
1.28V
OV
–
CLN
TGATE
Q1
20
S
Q
R
R_SENSE
20μF
CA1
CSP ^3k
14
9k
g_m = 1m
CA2
1.19V
BUFFERED ITH
÷5
ITH
10
6K
0.12μF
–+
I_CMP
BGATE
Q2
22
PGND
21
L1
PWM CHARGE
LOGIC
I_REV
17mV
PROG
11
0.0047μF
R_PROG
26.7k
4007 BD
4007fc
8