UCC25600EVM-644 No Output Voltage

POKAI HSU

Hey everyone, I would appreciate any input on my AC/DC PSU problem.

I'd bought UCC25600EVM-644 this evaluation board from TI recently.

However,I'd done some test:

AC input:100~120V without load,but there is no output voltage.

Does anyone here bought this kind of evaluation board,too.

over 8 years ago

0 Brian Johnson96 over 8 years ago

TI__Expert 3200 points

Hi Pokai,

I did not design this EVM but when I look at the User's Guide (SLOU293C), the 3rd note to Table 1 page 6 says you will need to load the +- 15 V outputs with 75 Ohm's during power up. Section 4.4 Standby claims if the power on the +- 15 V rail falls below 1.5 W, the main converters are turned off. Let me know if this solves your issue or not.

0 POKAI HSU over 8 years ago in reply to Brian Johnson96

Prodigy 65 points

Hi Brian,

I'll try it later,thank you for your response.

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UCC25600EVM-644 No Output Voltage