Texas Instruments C2000 Workshop Guide And Lab Manual

ePWM
C2000 Microcontroller Workshop - Control Peripherals 7 - 25
The PWM chopper sub-module uses a high-frequency carrier signal to modulate the PWM
waveform. This is used with pulsed transformer-based gate drives to control power-switching
elements.
Purpose of the PWM Chopper
 Allows a high frequency carrier
signal to modulate the PWM
waveform generated by the Action
Qualifier and Dead-Band modules
 Used with pulse transformer-based
gate drivers to control power
switching elements
As you can see in this figure, a high-frequency carrier signal is ANDed with the ePWM outputs.
Also, this circuit provides an option to include a larger, one-shot pulse width before the sustaining
pulses.
ePWM Chopper Waveform
EPWMxA
EPWMxB
CHPFREQ
EPWMxA
EPWMxB
OSHT
EPWMxA
Programmable
Pulse Width
(OSHTWTH)
Sustaining
Pulses
With One-Shot Pulse on EPWMxA and/or EPWMxB

Texas Instruments C2000 Specifications

General

Brand	Texas Instruments
Model	C2000
Category	Microcontrollers
Language	English