UCD9248 SRE goes low after programming the FPGA

SIVASUNDARAGANESH V V

Hi,

I am powering my FPGA with the power module - UCD9248 & PTD08D210W.

All the voltage and current is fine after power up. But the problem happens after programming the FPGA.

The Output voltage of PTD08D210W goes low after programming the FPGA.

I noticed there is no over current and FLT is Low. SRE is high after board power up but it goes down after programming the FPGA.

Can someone help me to solve this problem?

Best Regards

Sivasundaraganesh V.V
65 9750 4742

over 9 years ago

0 Zhiyuan Hu over 9 years ago

TI__Genius 9845 points

If a first rail has stay-on dependency on a second rail, and the second rail voltage falls below its PowerGoodOff threshold due to FPGA load step, the first rail will shut down as a result. You may uncheck if this is the case.

Regards,

Zhiyuan

0 SIVASUNDARAGANESH V V over 9 years ago in reply to Zhiyuan Hu

Prodigy 120 points

Hi,
Currently i dont have any such dependency between the rails.

0 Zhiyuan Hu over 9 years ago in reply to SIVASUNDARAGANESH V V

TI__Genius 9845 points

If the shutdown is not triggered by dependency, it should be a fault shutdown. In the Fusion GUI Monitor-> Status Registers/Lines window, it should show the fault that triggered shutdown. The logged faults are also shown in GUI Status page. Based on the fault information, you can find out what happened.

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UCD9248 SRE goes low after programming the FPGA