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NV-U74
35
SOFT-START
OSCILLATOR
COUNTER
SOFT-START2
ILIM CNTL
ENABLE
VOLTAGE
DETECT
CURRENT
CONTROL
CONTROL
LOGIC
CHARGER
CC/CV
REGULATOR
+
1V
–
IN2 1
BAT 2
OUT 3
IN1 4
IDEAL
DIODE
+
VR
–
4.35V
+
105 C
TA
–
DIE TEMP
5
WA
LL
6
SHDN
7
SUSP
8
HPWR
17
GND
16
NTC
15
VNTC
14
CHRG
13
ACPR
+
–
1V
CLPROG
9
GND
10
PROG
11
TIMER
12
+
1V
2U
2U
2U
500mA/100mA
–
I/O SEL
BA
TTER
Y CHARGER
ICHRG
ILIM
SENSE
ENABLE
+
–
0.25V
UVLO
0.1V
CLK
+
–
2.8V BATTERY
UVLO
+
–
4.1V
RECHARGE
+
–
+
–
+
–
STOP
BAT UV
RESET
RECHRG
NTC ENABLE
2HOT
NTC
2COLD
NTC
ERR
CURRENT LIMIT
HOLD
IC3003 LTC4055EUF#TR
1
SW
2
GND
3
FB
DRIVER
PWM &
LOGIC
CURRENT
SENSE
5 VIN
OVER VOLTAGE
PROTECTION
+
−
+
−
VOLTAGE
REFERENCE
1MHz
OSCILLATOR
THERMAL
SHUTDOWN
& UNDER
VOLTAGE
LOCK OUT
4 SHDN
IC3004 CAT4238TD-GT3
Содержание NV-U74
Страница 57: ...MEMO NV U74 57 ...