LTC4009-2_15 Datasheet, PDF (9/28 Pages) Linear Technology – High Efficiency, Multi-Chemistry Battery Charger

Block Diagram (LTC4009)
DCIN
3
CLP
2
CLN
1
ICL
4
CHRG
8
V_FB
10
INPUT
CURRENT
LIMIT
C/10
DETECTION
CC
LTC4009
LTC4009-1/LTC4009-2
BOOST AND
OV DETECTION
CA
R1
CSP
15
CSN ₁₄
EA
PROG ₁₃
BAT
11
9 FBDIV
DCDIV
5
ACP
7
SHDN
6
OSCILLATOR
TO
INTERNAL CIRCUITS
1.2085V
REFERENCE
CHARGE
OVERVOLTAGE
SHUTDOWN SHUTDOWN
CONTROL
TO
INTERNAL
CIRCUITS
PWM
LOGIC
TO
INTERNAL
CIRCIUTS
5V
REGULATOR
ITH ₁₂
BOOST ₂₀
TGATE ₁₉
SW ₁₈
INTV_DD
17
BGATE
16
GND ₂₁
4009 BD01
4009fd