LM5155: APPS Note [SNVA866] : Wrong calculation result on Equation.

Motoyasu Hattori

Part Number: LM5155

Hi,
According to application note "How to design an isolated flyback using LM5155 [SNVA866]", you can see the following three Equations. However the calculation result seems wrong. Could you please check them?

Equation 29 : 8.68kHz -> 3.10kHz

Equation 30 : 1.15kohm -> 1.11kohm

Equation 31 : 120nF -> 542nF

Thanks and best regards,
M.HATTORI.

over 4 years ago

0 Brigitte over 4 years ago

TI__Guru 65390 points

Hello Motoyasu,

The expert for this device will be back next week, but as far as I know, the formulas are correct, just the results are wrong. We will get back with a clear answer next week.

0 Motoyasu Hattori over 4 years ago in reply to Brigitte

TI__Genius 11015 points

Brigitte-san,

Any update? Please let us know.

Thanks and best regards,
M.HATTORI.

Power management

Power management forum

LM5155: APPS Note [SNVA866] : Wrong calculation result on Equation.