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TPS65266: 空载时静态电流10几mA

Part Number: TPS65266
Other Parts Discussed in Thread: TLV62130, ,

项目背景:输入电源:5V,输出需求:1V/3A,1.2V/2A,1.8V/2A,原理图是按照数据手册的参考电路

问题描述:目前空载的时候,5V电源给芯片供电,电源输入端有15mA左右的电流,电压输出1V,1.2V,1.8V正常,做了以下尝试:

1. 拉低每一路的EN或者将电感去掉,输入端的电流均会下降5mA左右;

2. 拉低所有的EN,输入端的电流在uA级别;

3. FB的电压为0.6V;

4. 将万用表串接进电感的左侧,有0.13mA左右的电流;

5. 测量了电感左侧的驱动波形如下:

6. 用同一颗电感,在TLV62130进行测试,空载时候的电流低于1mA;

问题:

1. 10几mA的静态电流是否是正常现象;