TPS61023: When there is no power en, there is an output

albert qiu

Part Number: TPS61023
Other Parts Discussed in Thread: TPS61032

Tool/software:

The schematic diagram is as follows:

sys_power is 2.8~4.2V,main_power=5V.when power_en=0V,Why does the main power have a 1V output?

0 albert qiu 6 months ago

Supplementary information：channel 1: power_en，channel 2：U7 SW,channel 3：sys power,channel 4: main_power.

Figure 3 is a magnification of Figure 2.

Best wishes.

0 Lei Zhong 6 months ago in reply to albert qiu

Hi Albert,

Normally the output should be zero when EN is 0.

Is the waveform measured on EVM or your board?

If available, please try a new fresh unit and measured whether the waveforms are the same.

Regards

Lei

0 albert qiu 6 months ago in reply to Lei Zhong

Hi Lei，

The reason has been found. The switch of other chips has affected the SW pin of TPS61032.

Thank you very much for your reply.

Regards

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