LM5175-Q1: Closed loop stability analysis issue

Nagasrinivasa Kureti

Part Number: LM5175-Q1
Other Parts Discussed in Thread: LM5175, LM5175QUICKSTART-CALC

Dear Team,

In one of our design we are using the LM5175 for 15V output application. I want to find the stability of the designed converter through simulation or calculations. I have already tried to simulate using LTSpice but the results are not good. So, i want to try with some other method. So could you please help or suggest me any other method to solve the closed loop stability for the designed circuit.

Thanking you in advance,

Kureti

over 7 years ago

0 Zack Liu over 7 years ago

TI__Mastermind 34231 points

Hi Kureti,

You can use WEBENCH or TINA to get the simulation result. We have TINA models available that you can download.

Regards,
Zack

0 Nagasrinivasa Kureti over 7 years ago in reply to Zack Liu

Prodigy 115 points

Dear Zack,

Thanking you for your reply.

I have tried in the TINA, but not able to find the some of the components in the TINA and also not aware on how to do the Frequency Response Analysis. Could you please provide me the IC transfer function, so that I can solve the problem by calculating the closed loop transfer function. Could you please share the application document which helps to solve the closed loop stability of the system.

Thanking You.

Kureti

0 Zack Liu over 7 years ago in reply to Nagasrinivasa Kureti

TI__Mastermind 34231 points

Hi Kureti,

If you want to get the loop response bode plot, you can use this quickstart calculator: http://www.ti.com/tool/lm5175quickstart-calc

Regards,
Zack

Power management

Power management forum

LM5175-Q1: Closed loop stability analysis issue