LM5025A: LM5025A quick questions

Sulyn ZHANG

Part Number: LM5025A

Hi Team,

My customer want to double check some normal voltage on critical pins to verify it's normal working status during production and test, can you help double check,

Customer want to know the normal voltage on SS pin, RT pin and time pin. Thanks a lot!

Best regards,

over 8 years ago

0 Sulyn ZHANG over 8 years ago

TI__Expert 8700 points

Hi Team,

Can you help have a look and double check this, thanks a lot!

Best regards,

Sulyn Zhang

0 Peter Meaney over 8 years ago in reply to Sulyn ZHANG

TI__Mastermind 31580 points

Hi Sulyn,

Sorry for the delay in replying to your post. I have asked the applications engineer to respond to your post.

Regards

Peter

0 Sulyn ZHANG over 8 years ago in reply to Peter Meaney

TI__Expert 8700 points

Hi Peter,

Thanks, can you help check when I can got some feedback from team? Thanks.

Best regards,

Sulyn Zhang

0 Wangxin Huang over 8 years ago in reply to Sulyn ZHANG

TI__Intellectual 1550 points

Hi Sulyn,

Per the abs max rating shown in the datasheet on page 5, the max allowed voltage of the pins you are inquiring is 7V.

Regards,
Wangxin

0 Sulyn ZHANG over 8 years ago in reply to Wangxin Huang

TI__Expert 8700 points

Hi Wangxin,

Thanks for the support. But I think you misunderstanding my question. Customer want to know the normal voltage on these three pins(SS pin, RT pin and Time pin) when normal working to make sure LM5025A works normally in customer's case, but not abs max voltage which already showed in the datasheet. Can you help check this, thanks a lot!

Best regards,

Sulyn Zhang

0 Wangxin Huang over 8 years ago in reply to Sulyn ZHANG

TI__Intellectual 1550 points

Sulyn,

During steady state operation,

SS should be around 5V, not sure about RT pin and time pin. I searched through the datasheet, EVM user guide but couldn't find the steady state waveforms for these pins.

Can you please order a LM5025A EVM to look at the waveforms on these pins? The EVM can be ordered from ti.com, http://www.ti.com/tool/lm5025aeval#buy or purchased from a distributor, for example, https://www.digikey.com/products/en/development-boards-kits-programmers/evaluation-boards-dc-dc-ac-dc-off-line-smps/792?k=lm5025a

Regards,

Wangxin

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LM5025A: LM5025A quick questions