Datasheet

LTC4090/LTC4090-5
11
4090fc
BLOCK DIAGRAM
–
+
SOFT-START
0.25V
SOFT-START2
–
+
–
+
–
+
–
+
15
TOO
COLD
CURRENT LIMIT
TOO
HOT
0.1V
NTC ENABLE
V
NTC
14
NTC
T
10k
R
PROG
10k
–
+
13
HPWR
22
CLPROG
IN
23
PROG
CHG
1V
500mA/100mA
2MA
–
+
–
+
CURRENT
CONTROL
VC CLAMP
CHARGE CONTROL
CONTROL LOGIC
VOLTAGE DETECT
COUNTER
OSCILLATOR
TA
DIE
TEMP
105°C
I
LIM
2.8V
–
+
2.9V
BATTERY
UVLO
4.1V
RECHARGE
UVLO
IN OUT BAT
I
CHG
BAT UV
RECHRG
HOLD
RESET
NTCERR
CLK
EOC
C/10
–
+
–
+
11
2μA
16
GND SUSP
R
CLPROG
V
SET
3.6V (LTC4090)
5V (LTC4090-5)
IN
HVOUT
OUTOUT
GATE
BATBAT
21
TIMER
C
TIMER
18
CHRG
STOP
HVPR
4090 BD
1V
CL
I
LIM
CNTL
ENABLE
–
+
EDA
19
D1
C2
L1
I
IN
1000
10
C
C
R
C
C
F
PG
HVIN
V
C
10
CC/CV REGULATOR
CHARGER
ENABLE
–
+
–
+
4.25V (RISING)
3.15V (FALLING)
–
+
21
21
21
R
S
Q
R
T1
10
C1
10
SYNC
10
R
T
10
HVEN
10
–
+
+
75mV (RISING)
25mV (FALLING)
350mV
(LTC4090)
GM
BOOST
Q1
SW
20mV
30mV
IDEAL
DIODE
Q
DRIVER
+
–
+
–
+
–
+
–
OSCILLATOR
200kHz - 2.4MHz
SOFT-START
INTERNAL
REFERENCE
I
L