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A4052MP8R 参数 Datasheet PDF下载

A4052MP8R图片预览
型号: A4052MP8R
PDF下载: 下载PDF文件 查看货源
内容描述: [BATTERY MANAGEMENT]
分类和应用:
文件页数/大小: 11 页 / 291 K
品牌: AITSEMI [ AiT Semiconductor ]
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A4052  
BATTERY MANAGEMENT  
AiT Semiconductor Inc.  
www.ait-ic.com  
1A IS COMPATIBLE WITH THE USB INTERFACE,  
LINEAR BATTERY MANAGEMENT CHIP  
The large current output design  
Since the A4052 using the internal constant power technology, therefore , when the input VIN and BAT  
pressure is too large , will lead to smaller the BAT voltage range of the maximum current , so that the charging  
time becomes longer , in order to make the maximum current charging interval larger by an external resistor  
or Schottky methods to achieve.  
The assumption the A4052 of PSOP8 inside the package the maximum allowable power 1.2W, maximum  
charge current is set to 1.2A. If uses a resistive, we assume that the use of the resistance of 0.5Ω (1W), High  
current charging, the voltage drop across the resistor is 0.5*1.2=0.6V. The A4052 real operating voltage is  
4.4V. Thus, in this state, (VIN-VBAT) *1.2<1.2W, therefore VBAT>3.6VThe battery voltage is above 3.6V 1.2A  
charging support. Below 3.6V, the A4052 will automatically reduce the charge current to maintain the chip  
internal power balance.  
If Schottky similar calculation can be made , according to the Schottky voltage drop at different current .  
In addition, in the high-current applications need to pay attention A4052 PCB layout design must consider  
increasing EXPOSED PAD area , and will be connected to the EXPOSED PAD to GND in order to improve  
the thermal performance , and ensure the stable operation of the chip .  
REV1.0  
- OCT 2013 RELEASED -  
- 9 -