LTC1732-4.2_15 Datasheet, PDF (6/12 Pages) Linear Technology – Lithium-Ion Linear Battery Charger Controller

LTC1732-4/LTC1732-4.2
BLOCK DIAGRA
UNDERVOLTAGE
LOCKOUT
C5
V_UV = 4.1V
C1
CHRG
3
TIMER
4
ACPR
10
35µA
C/10 STOP UVLO RECHRG C/10
ACPR
LOGIC
SHDN
SLP
OSCILLATOR
V_REF
COUNTER
+
C3
A1
–
BATTERY CURRENT I_BAT = (2.457V • 800Ω)/(R_PROG • R_SENSE)
V_CC
8
3.8V (LTC1732-4)
4.05V (LTC1732-4.2)
80Ω
720Ω
800Ω
C4
–
CA
+
C2
LBO
+– _54mV
SENSE
9
DRV
7
BAT
1
SEL
2
V_CC
2.5µA
PROG
6
R_PROG
VA
V_REF
2.457V
CHARGE
GND
5
1732 BD
R_SENSE
6