LM5116: TINA simulation with LM5116 to create a inverting power

Marsh Cai

Part Number: LM5116

Hi Experts:

My customer want to create an inverting power supply with input=12V

The requirements:

1, input: 12V

2, output: -65V@1A Max.

By generating by Webench, LM5116 is recommended. However when i simulate the sch in the TINA, the output is supper strange.

The TINA simulation file is attached. Can you help to review it and help me to finish the simulation to get the proper output?

Thanks and best regards,

Marsh

0 Marsh Cai over 2 years ago

0 EricLee over 2 years ago

Hello Marsh

Looks like there is an instability issue. Please check if any change with 7.6kOhm Rcomp and 18nF Ccomp .

-Eric Lee

0 EricLee over 2 years ago in reply to EricLee

Hello Marsh

I saw your TSC file just before. Thanks.

+1 EricLee over 2 years ago in reply to EricLee

Hello Marsh

It looks like the grounds of the device model should be connected to the ground symbol always. Please see below.

It works after I changed R10 to 1kOhm , C6 to 100nF. Please run up to ~ 5msec

- Eric Lee

0 Marsh Cai over 1 year ago in reply to EricLee

Hi Eric,

Thanks a lot. I guess that's true "It looks like the grounds of the device model should be connected to the ground symbol always".

You solved my question.

Marsh

0 EricLee over 1 year ago in reply to Marsh Cai

Thanks for choosing TI. Please feel free to contact us if you have any question.
- Eric Lee (Applications Engineering)

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