参数资料
型号: LTC4052EMS8E-4.2
厂商: Linear Technology
文件页数: 5/12页
文件大小: 0K
描述: IC CHARGER PULSE LI-ION 8-MSOP
标准包装: 50
功能: 充电管理
电池化学: 锂离子(Li-Ion)
电源电压: 4.5 V ~ 10 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 8-TSSOP,8-MSOP(0.118",3.00mm 宽)裸露焊盘
供应商设备封装: 8-MSOP-EP
包装: 管件
LTC4052-4.2
PI FU CTIO S
A series RC network from the GATE to the V IN pin is
required to control the slew rate at the V IN pin when the
switch is turned on or off. The slew rate control prevents
excessive current from the capacitor usually located in the
wall adapter from flowing into the battery when the pass
transistor turns on.
BLOCK DIAGRA
ACPR
2
BAT (Pin 8): Battery Sense Input Pin. An internal resistor
divider presets the final float voltage to 4.2V. If the BAT pin
drops below 4.05V after the charge cycle has ended, the
timer resets and a new charge cycle begins. This pin is
clamped to 4.7V if the battery is disconnected while
charging.
– +
V IN
3
45mV
+ –
+
100ms
SLEEP
I MAX
+
105mV
V IN
BAT
FILTER
10m ?
1
SENSE
GND
4
CHARGE
PUMP
TRIPLER
24mA
7
GATE
TIMER
5
OSCILLATOR
8
BAT
CLK
TRICKLE
FAST
V MIN
+
CHRG
6
40 μ A
STOP
C/10
LOGIC
+
TIMERS
V RECHRG
V FLOAT
+
+
THERMAL
SHUTDOWN
REFERENCE
1.23V
TEMP
V MAX
+
1.23V
4052 BD
405242f
5
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