UCD3138PSFBEVM-027: burst mode

jae yeoul yoo

Prodigy 130 points

Part Number: UCD3138PSFBEVM-027

Hello

I tested UCD3138PSFBEVM-027

At no load condition, there is no burst mode operation.

Sync FET is on PWM switching

How can I operate burst mode at light load.

over 3 years ago

+1 Sean Xu over 3 years ago

TI__Genius 14580 points

Hello,

Can you access source code? If so, you can turn off DPWM0B and DPWM1B. by using the below codes:

Dpwm0Regs.DPWMCTRL1.bit.GPIO_B_EN =1;

Dpwm1Regs.DPWMCTRL1.bit.GPIO_B_EN =1;

Thanks,

Sean

+1 jae yeoul yoo over 3 years ago in reply to Sean Xu

Prodigy 130 points

thank you, Sean

Burst mode release around 5 A.

Can I adjust a release point.

0 Sean Xu over 3 years ago in reply to jae yeoul yoo

TI__Genius 14580 points

Hi, Yae,

Yes, you can make it enter burst mode at 5A. Burst mode on/off is based on filter output, and you can adjust the threshold associated with current. Meanwhile, you need turn off DPWM0B/1B.

Regards,
Sean

Power management

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UCD3138PSFBEVM-027: burst mode