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ACE4054 参数 Datasheet PDF下载

ACE4054图片预览
型号: ACE4054
PDF下载: 下载PDF文件 查看货源
内容描述: 完全集成的恒定电流/恒定电压锂离子电池充电器 [Fully integrated constant current/constant voltage Li-ion battery charger]
分类和应用: 电池
文件页数/大小: 18 页 / 1000 K
品牌: ACE [ ACE TECHNOLOGY CO., LTD. ]
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ACE4054
Fully integrated constant current/constant voltage
Description
The ACE4054 is a single cell, fully integrated constant current (CC) / constant voltage (CV) Li-ion battery
charger. Its compact package with minimum external components requirement makes the ACE4054 ideal
for portable applications.
No external sense resistor or blocking diode is necessary for the ACE4054. Build-in thermal feedback
mechanism regulates the charge current to control the die temperature during high power operation or at
elevated ambient temperature.
The ACE4054 has a pre-charge function for trickle charging deeply discharged batteries. The fast
charge current can be programmed by an external resistor. CV regulation mode is automatically enabled
once the battery’s charging curve reaches the constant voltage portion. The output current then decays
and is finally terminated once the charge current drops to 1/10
th
of the programmed value. The ACE4054
keeps monitoring the battery voltage and enables a new charge cycle once the voltage drops by 150mV
below the CV value.
Power supply state is constantly monitored and the battery drain current is reduced to minimum value
automatically when the ACE4054 senses a lack of input power. In its shutdown mode, the ACE4054 can
reduce the supply current to less than 25μA. A status pin outputs a logic HIGH/LOW to indicate the
charging status and the presence of power supply.
Other features include charge current monitor, under-voltage lockout.
Li-ion battery charger
Features
Standalone Capability with no Requirement of External MOSFET, Sense Resistor or Blocking Diode
Complete Linear Charger in Compact Package for Single Cell Lithium-Ion Batteries
Programmable Pre-charge, Fast Charge and Termination Current
Constant-Current/Constant-Voltage Operation with Thermal Regulation to Maximize Charge Rate
Without Risk of Overheating
Charges Single Cell Li-Ion Batteries Directly from USB Port
Preset 4.2V Charge Voltage with
±1%
Accuracy
Automatic Recharge
Charge Status Output Pin
C/10 Charge Termination
25μA Supply Current in Shutdown
2.9V Trickle Charge Threshold
Soft-Start Limits Inrush Current
Available in 5-Lead SOT-23 (0.5A) and ESOP-8 Package (1A)
Application
Cellular Telephones,PDAs,MP3 Players
Charging Docks and Cradles
Bluetooth Applications
VER 1.4
1