LTC4008 Linear Technology, LTC4008 Datasheet - Page 7

• Manufacturer Part Number: LTC4008
• Description: Multi-Chemistry Battery Charger
• Manufacturer: Linear Technology

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BLOCK DIAGRA
V
IN
0.1µF
R
CL
Q3
Q1
Q2
L1
0.1µF
5k
ACP/SHDN 3
20µF
BATMON
INFET*
TGATE
BGATE
FAULT 5
PGND
FLAG
DCIN
GND
V
CLP
CLN
I
FB
CL
20
14
13
16
15
17
19
18
1
6
7
2
100mV
CLP
–
+
WATCHDOG
CL1
5.8V
DETECT
OSCILLATOR
W
LOGIC
g
DCIN
*
PWM
t
m
OFF
= 1.4m
1.19V
CHARGE
Ω
Q
*
1.28V
–
+
R
S
+
–
CLP
+
–
EA
*NOT USED IN THE LTC4008-1
OV
g
m
= 1m
Ω
CONTROL
BLOCK
g
m
÷ 5
I
= 1m
I
CMP
REV
35mV
Ω
BUFFERED I
CA2
TH
+
CA1
–
TBAD
–
+
+
–
–
+
C/10
–
+
–
1.19V
THERMISTOR
OSCILLATOR
11.67µA
+
17mV
–
+
9k
397mV
12
11
10
4
8
9
R
NTC
BAT
CSP
I
PROG
TH
4.7nF
T
0.47µF
32.4k
150k
6K
3k
3k
0.12µF
LTC4008
R
R
26.7k
SENSE
PROG
10k
NTC
4008 BD
20µF
4008fa
7