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ACE4704 参数 Datasheet PDF下载

ACE4704图片预览
型号: ACE4704
PDF下载: 下载PDF文件 查看货源
内容描述: 完全5A , 4cell独立锂离子电池充电器 [Fully 5A, 4cell Standalone Li-ion Battery Charger]
分类和应用: 电池
文件页数/大小: 15 页 / 889 K
品牌: ACE [ ACE TECHNOLOGY CO., LTD. ]
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ACE4704  
Fully 5A, 4cell Standalone Li-ion Battery Charger  
End-of-Charge Current Setting  
End-of-charge current can be set by connecting a resistor from EOC pin to GND, and is decided by the  
following equation:  
IEOC=1.278*(14,350+Rext) / RCS*106  
WhIEeOrCe:is the end-of-charge current in Ampere  
Rext is the external resistance from EOC pin to GND in Ω. Rext can not be great than 100KΩ,  
otherwise the charging may not be terminated correctly.  
RCS is the current sense resistance between CSP pin and BAT pin in Ω  
It is our interest to calculate the ratio between IEOC and ICH:  
When Rext=0Ω, the minimum IEOC/ICH=9.17%  
When Rext=100KΩ, the maximum IEOC/ICH=73%  
Automatic Battery Recharge  
After the charge cycle is completed and both the battery and the input power supply (wall adapter) are  
still Connected, a new charge cycle will begin if the battery voltage drops below 16V due to self-discharge  
or external loading. This will keep the battery capacity at more than 80% at all times without manually  
restarting the charge cycle.  
Battery Temperature Monitoring  
A negative temperature coefficient (NTC) thermistor located close to the battery pack can be used to  
monitor battery temperature and will not allow charging unless the battery temperature is within an  
acceptable range. Connect a 10kΩ thermistor from the TEMP pin to ground. Internally, for hot  
temperature, the low voltage threshold is set at 175mV which is equal to 50(RNTC≈3.5kΩ). For cold  
temperature, the high voltage threshold is set at 1.61V which is equal to 0(RNTC≈32kΩ) with 50uA of  
pull-up current.  
Once the temperature is outside the window, the charge cycle will be suspended, and the charge cycle  
resumes if the temperature is back to the acceptable range.  
VER 1.2  
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