参数资料
| 型号： | LTC4088EDE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 8/24页 |
| 文件大小： | 0K |
| 描述： | IC BATT CHARGER/USB 14-DFN |
| 标准包装： | 2,500 |
| 功能： | 充电管理 |
| 电池化学： | 锂离子（Li-Ion）、锂聚合物（Li-Pol） |
| 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： | 14-WFDFN 裸露焊盘 |
| 供应商设备封装： | 14-DFN-EP（4x3） |
| 包装： | 带卷 (TR) |
LTC4088
PIN FUNCTIONS
CHRG (Pin 7): Open-Drain Charge Status Output. The
CHRG pin indicates the status of the battery charger. Four
possible states are represented by CHRG : charging, not
charging (or float charge current less than programmed
end of charge indication current), unresponsive battery and
battery temperature out of range. CHRG is modulated at
35kHz and switches between a low and a high duty cycle
for easy recognition by either humans or microprocessors.
CHRG requires a pull-up resistor and/or LED to provide
indication.
GATE (Pin 8): Ideal Diode Amplifier Output. This pin con-
trols the gate of an optional external P-channel MOSFET
transistor used to supplement the internal ideal diode. The
source of the P-channel MOSFET should be connected to
V OUT and the drain should be connected to BAT.
BAT (Pin 9): Single Cell Li-Ion Battery Pin. Depending on
available power and load, a Li-Ion battery on BAT will either
deliver system power to V OUT through the ideal diode or
be charged from the battery charger.
V OUT (Pin 10): Output voltage of the switching PowerPath
controller and input voltage of the battery charger. The
majority of the portable product should be powered from
V OUT . The LTC4088 will partition the available power be-
tween the external load on V OUT and the internal battery
charger. Priority is given to the external load and any extra
power is used to charge the battery. An ideal diode from
BAT to V OUT ensures that V OUT is powered even if the load
exceeds the allotted power from V BUS or if the V BUS power
source is removed. V OUT should be bypassed with a low
impedance multilayer ceramic capacitor.
V BUS (Pin 11): Input voltage for the switching PowerPath
controller. V BUS will usually be connected to the USB port
of a computer or a DC output wall adapter. V BUS should
be bypassed with a low impedance multilayer ceramic
capacitor.
SW (Pin 12): The SW pin delivers power from V BUS to
V OUT via the step-down switching regulator. An inductor
should be connected from SW to V OUT . See the Applica-
tions Information section for a discussion of inductance
value and current rating.
D0 (Pin 13): Mode Select Input Pin. D0, in combination
with the D1 pin and the D2 pin, controls the current limit
and battery charger functions of the LTC4088 (see Table 1).
This pin is pulled low by a weak current sink.
D1 (Pin 14): Mode Select Input Pin. D1, in combination
with the D0 pin and the D2 pin, controls the current limit
and battery charger functions of the LTC4088 (see Table 1).
This pin is pulled low by a weak current sink.
Exposed Pad (Pin 15): GND. Must be soldered to the
PCB to provide a low electrical and thermal impedance
connection to ground.
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相关代理商/技术参数 |
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| LTC4089 | 制造商:LINER 制造商全称:Linear Technology 功能描述:USB Power Manager with High Voltage Switching Charger |
| LTC4089-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:USB Power Manager with High Voltage Switching Charger |
| LTC4089-3 | 制造商:LINER 制造商全称:Linear Technology 功能描述:USB Power Manager with High Voltage Switching Charger |
| LTC4089-5 | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Efficiency Battery Charger/USB Power Manager |
| LTC4089EDJC | 制造商:LINER 制造商全称:Linear Technology 功能描述:USB Power Manager with High Voltage Switching Charger |
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