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L9963E Fault-L pin.

Jeonghun
Associate

hi

I made a board with stm32l431 and L9963E.

The voltage, current and temperature values have been read successfully.

In addition, it was confirmed that it operates with settings such as UT, OT, OV, and UV.

However, the Fault-L pin does not change to high level.

Are there any conditions that must be set to use the Fault-L pin?

Jeonghun_0-1707351121705.png

In normal condition, HeartBeat_En is set to '0'.

Jeonghun_1-1707351672368.png

The conditions in the safety mechanism summary have been met.

Jeonghun_2-1707351774042.png

However, the Fault-L pin is still at low level.

Jeonghun_3-1707351883042.png

This is the circuit of the Fault-L pin.

Jeonghun_4-1707352368603.png

L9963E is the setup code.

What's wrong?

 

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