ePWM Module Signals and Connections
ePWM Block Diagram
ePWM Time-Base Sub-Module
ePWM Compare Sub-Module
ePWM Action Qualifier Sub-Module
ePWM Dead-Band Sub-Module
ePWM Chopper Sub-Module
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
ePWM Trip-Zone and Digital Compare Sub-Module
Purpose of the Digital Compare Sub-Module
-
Generates compare events that can:
- Trip the ePWM
- Generate a Trip interrupt
- Sync the ePWM
- Generate an ADC start of conversion
-
Digital compare module inputs are:
- Input X-Bar
- ePWM X-Bar
- Trip-zone input pins
- A compare event is generated when one or more of its selected inputs are either high or low
- Optional Blanking can be used to temporarily disable the compare action in alignment with PWM switching to eliminate noise effects
ePWM Event-Trigger Sub-Module
Hi-Resolution PWM (HRPWM)
Reference
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