参数资料
型号: LTC4066EPF#TRPBF
厂商: Linear Technology
文件页数: 10/28页
文件大小: 0K
描述: IC USB POWER MANAGER 24-UTQFN
标准包装: 2,500
功能: 电源管理
电池化学: 锂离子(Li-Ion)
电源电压: 4.35 V ~ 5.5 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 24-UFQFN 裸露焊盘
供应商设备封装: 24-UTQFN-EP(4x4)
包装: 带卷 (TR)
LTC4066/LTC4066-1
PIN FUNCTIONS
CLPROG (Pin 22): Current Limit Program and Input Cur-
rent Monitor. Connecting a resistor, R CLPROG , to ground
programs the input to output current limit. The current
limit is programmed as follows:
PROG (Pin 23): Charge Current Program. Connecting a
resistor, R PROG , to ground programs the battery charge
current. The battery charge current is programmed as
follows:
I CL ( A ) =
1000 V
R CLPROG
I CHG ( A ) =
50, 000 V
R PROG
I IN ( A ) =
V CLPROG
In USB applications the resistor R CLPROG should be set
to no less than 2.1k.
The voltage on the CLPROG pin is always proportional to
the current ?owing through the IN to OUT power path.
This current can be calculated as follows:
? 1000
R CLPROG
I STAT (Pin 24): Battery Current Status Pin. One-thousandth
of the current ?owing into or out of the BAT pins ?ows
out of this pin. The POL polarity pin indicates which
direction current is ?owing. If the current ?owing into
the BAT pins drops below 1mA, then the I STAT pin will
continue to source 1μA. The I STAT pin also programs the
charge current level at which the CHRG pin transitions to
its high impedance state. When the I STAT voltage drops
below 0.1V while charging in constant voltage mode the
CHRG pin will transition to a high impedance state. This
corresponds to a BAT current of:
I BAT ( A ) =
0 . 1 V
R ISTAT
? 1000
4066fc
10
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