TPS54140: TPS54140 Average Model parameter

yuwei wu

Prodigy 140 points

Part Number: TPS54140

In TPS54140 Average Model, what does L mean in U1 macromodel ?

What is difference for L between U1 macromodel and LDCR?

What does IC mean in LDCR ?

What does Cinj and Linj mean for output Voltage? How does these two parameter to affect the AC analysis?

over 5 years ago

0 Andy Chen over 5 years ago

TI__Mastermind 34875 points

Hi Yuwei,

U1 macro model behavior depends on inductor L parameter, L between U1 macro model and L1 LDCR should have same inductance.

Where is Cinj and Linj?

B R
Andy

0 yuwei wu over 5 years ago in reply to Andy Chen

Prodigy 140 points

Hi Andy

Cinj and Linj and V3 show as below picture.

0 Ankit Gupta95 over 5 years ago in reply to yuwei wu

TI__Expert 4555 points

Hello Yuwei,

Please let me know if the issue is still open or if you have questions unanswered.

Best Regards,

Ankit Gupta

0 yuwei wu over 5 years ago in reply to Ankit Gupta95

Prodigy 140 points

Hi Andy

What does Cinj and Linj mean for output Voltage? How does these two parameter to affect the AC analysis?

Thank!

0 Daniel Li14 over 5 years ago in reply to yuwei wu

TI__Mastermind 27470 points

Cinj and Linj is used for block the injection AC noise affect the output DC value of average mode, because we sim the open loop bode plot. you can try to reduce the Linj and Cinj to 1H and 1F, it is no affect to the loop which frequency higher than 100hz , only gain and phase have little change at low frequency.

Thanks

Daniel Li

Power management

Power management forum

TPS54140: TPS54140 Average Model parameter