LM5116: LM5116 compensation calculate

Jimmy WANG

Genius 4065 points

Part Number: LM5116

Hi team,

I need some help to complete the compensation calculation.

Vin=12V

Vo= -55V

Io= -1.4A

L=22uH

C=220uF(ESR@100mR)

0 Timothy Hegarty over 4 years ago

Hi Jimmy,

WEBENCH or PSPICE simulation may be your best option for this IBB application. Also, take a look at app note SNVA856: www.ti.com/lit/snva856

Note the max duty cycle constraint given the 12V input and -55V output.

Regards,

Tim

0 Jimmy WANG over 4 years ago in reply to Timothy Hegarty

Genius 4065 points

Hi Team,

The Webench simulation result can not to wrok. so I need help to complete it. aslo i use Power Stage Designer Tool 4.0 tool as IBB topology.

Seems to some problem. can not work as I setting Vo= -55V. only -10V

0 Timothy Hegarty over 4 years ago in reply to Jimmy WANG

Hi Jimmy,

Take a look at this SEM2200 power supply design seminar "Switch-mode power converter compensation made easy":

Regards,

Tim

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