Datasheet

6
LTC4050
4050f
BLOCK DIAGRA
W
–
+
–
+
–
+
–
+
LOGICACPR
C1
–
+
C4
–
+
–
+
C3 A1
CA
C2
VA
CHARGE
GND
4050 BD
PROG
BATTERY CURRENT I
BAT
= (2.47V • 800Ω)/(R
PROG
• R
SENSE
)
R
PROG
V
REF
2.47V
LBO
80Ω
V
CC
800Ω
54mV
R
SENSE
SENSE
DRV
BAT
720Ω
32µA
TIMER
OSCILLATOR
V
REF
COUNTER
STOP RECHRG
SHDN SLP
C/10 C/10
2.3µA
V
CC
CHRG
5
6
3
4
ACPR
10
9
8
7
1
+
–
–
+
C5
3.88V (LTC4050-4.1)
3.98V (LTC4050-4.2)
–
+
–
+
2
UV
28.6k
NTC
3.6V