LM5122: Queries and Request Regarding LM5122 Usage

SHH

Part Number: LM5122

Hi Team,

Could you please confirm if, with the LM5122, when VIN=20V, VO=24V, IO=6.3A, and under light load conditions, the switch frequency would fall below 25kHz in Forced PWM Mode?

If LM5122 is usable under these conditions, could you also assist in providing a reference circuit? Thank you.

8883.lm5122.pdf

Best,

Scott

over 2 years ago

0 Stefan Schauer over 2 years ago

TI__Guru 53741 points

HI Scott,

thank you for using the E2E forum.

Please check this reference design - this is very close to your requirements:PMP9484 reference design | TI.com

Best regards,

Stefan

0 SHH over 2 years ago in reply to Stefan Schauer

TI__Mastermind 31446 points

Hi Stefan,

The response wasn't clear about the conditions LM5122，VIN=20V VO=24V IO=6.3A. When the load is light, if customer choose the Forced PWM Mode, will the switching frequency drop below 25 KHz?

BR,

Scott

0 Stefan Schauer over 2 years ago in reply to SHH

TI__Guru 53741 points

Hi Scott,

when the device is configured for FPWM, the frequency will not change (drop to below 25kHz), even in light load but then energy can be pushed back to the input side.

Best regards,

Stefan

Power management

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LM5122: Queries and Request Regarding LM5122 Usage