SPRUIZ1B July 2023 – August 2024 TMS320F28P650DH , TMS320F28P650DK , TMS320F28P650SH , TMS320F28P650SK , TMS320F28P659DH-Q1 , TMS320F28P659DK-Q1 , TMS320F28P659SH-Q1
Figure 22-44 shows the operational details of the PWM chopper submodule. The carrier clock is derived from EPWMCLK. The clock frequency and duty cycle are controlled using the CHPFREQ and CHPDUTY bits in the PCCTL register. The one-shot block is a feature that provides a high energy first pulse to make sure hard and fast power switch turn on, while the subsequent pulses sustain pulses, making sure the power switch remains on. The one-shot width is programmed using the OSHTWTH bits. The PWM chopper submodule can be fully disabled (bypassed) using the CHPEN bit.