UCC5350: How can a 3.3V PWM signal (from a DSP) be converted to a 12V PWM signal to drive a gate driver for MOSFETs?"

Ethan Ku

Part Number: UCC5350
Other Parts Discussed in Thread: UCC27511

Due to component placement constraints, the PWM traces may become excessively long.

We aim to shift the PWM signal level from 3.3V to 12V to minimize interference. Are there any design solutions available to meet this requirement

PS: PWM swithing Frequncy=50KHZ ,End product=DCDC module for charging stataion

thank in advance

4 months ago

+1 Sean Cashin 4 months ago

TI__Genius 15146 points

Hi Ethan,

The C8021= 1nF capacitor should be enough to filter the 3.3V rail. However, if you want extra noise margin, and you're not sure if the DSP can drive 1nF, you can add a low-side gate driver like the UCC27511 as a digital buffer and level-shifter to drive the long trace.

Best regards,

Sean

0 Ethan Ku 3 months ago in reply to Sean Cashin

Prodigy 80 points

hi Sean

thanks for your recommend

Power management

Power management forum

UCC5350: How can a 3.3V PWM signal (from a DSP) be converted to a 12V PWM signal to drive a gate driver for MOSFETs?"