参数资料
型号: LTC4055EUF#TRPBF
厂商: Linear Technology
文件页数: 12/24页
文件大小: 0K
描述: IC USB PWR MNGR BATT CHRGR 16QFN
标准包装: 2,500
功能: 充电管理
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: 16-WQFN 裸露焊盘
供应商设备封装: 16-QFN(4x4)
包装: 带卷 (TR)
LTC4055/LTC4055-1
OPERATION
Table 1. Operating Modes—PowerPath States Current Limited Input Power (IN1/IN2 to OUT)
WALL PRESENT SHUTDOWN
SUSPEND
V IN > 3.8V
V IN > (V OUT + 100mV)
V IN > (V BAT + 100mV)
CURRENT LIMIT ENABLED
Y
X
X
X
X
X
N
X
Y
X
X
X
X
N
X
X
Y
X
X
X
N
X
X
X
N
X
X
Y
X
X
X
X
N
X
Y
X
X
X
X
X
N
Y
N
N
N
N
N
N
Y
Input Powered Charger (IN1/IN2 to BAT)
WALL PRESENT SHUTDOWN
SUSPEND
V IN > 4.35V
V IN > (V OUT + 100mV)
V IN > (V BAT + 100mV)
INPUT CHARGER ENABLED
Y
X
X
X
X
X
N
X
Y
X
X
X
X
N
X
X
Y
X
X
X
N
X
X
X
N
X
X
Y
X
X
X
X
N
X
Y
X
X
X
X
X
N
Y
N
N
N
N
N
N
Y
Output Powered Charger (OUT to BAT)
WALL PRESENT SHUTDOWN
SUSPEND
V IN > 4.35V
V OUT > (V IN + 100mV)
V OUT > (V BAT + 100mV)
OUTPUT CHARGER ENABLED
N
X
X
X
X
Y
X
Y
X
X
X
N
X
X
X
X
X
X
X
X
N
X
X
Y
X
X
X
N
X
Y
X
X
X
X
N
Y
N
N
N
N
N
Y
Ideal Diode (BAT to OUT)
WALL PRESENT SHUTDOWN
SUSPEND
V BAT > 2.8V
V BAT > V OUT
V IN
DIODE ENABLED
X
X
X
X
Y
X
X
N
X
X
X
X
X
N
X
Y
X
X
N
Y
X
X
X
X
N
N
N
Y
Table 2. Operating Modes—Pin Currents vs Programmed Currents (Charging from IN1/IN2)
PROGRAMMING
I CL = I CHG
I CHG < I CL
I CL < I CHG
OUTPUT CURRENT
I OUT < I CL
I OUT = I CL = I CHG
I OUT > I CL
I OUT < (I CL – I CHG )
I OUT > (I CL – I CHG )
I OUT = I CL
I OUT > I CL
I OUT < I CL
I OUT > I CL *
BATTERY CURRENT
I BAT = I CHG – I OUT
I BAT = 0
I BAT = I CL – I OUT
I BAT = I CHG
I BAT = I CL – I OUT
I BAT = 0
I BAT = I CL – I OUT
I BAT = I CL – I OUT
I BAT = I CL – I OUT
INPUT CURRENT
I IN = I Q + I CL
I IN = I Q + I CL
I IN = I Q + I CL
I IN = I Q + I CHG + I OUT
I IN = I Q + I CL
I IN = I Q + I CL
I IN = I Q + I CL
I IN = I Q + I CL
I IN = I Q + I CL
*Charge current shuts off when V OUT drops below V BAT , i.e., when I OUT exceeds I CL .
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