ePWM
7 - 24 TMS320F2837xD Microcontroller Workshop - Control Peripherals
ePWM Dead-Band Sub-Module
ePWM Dead-Band Sub-Module
16-Bit
Time-Base
Counter
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Logic
Action
Qualifier
Dead
Band
PWM
Chopper
Trip
Zone
Period
Register
Clock
Prescaler
EPWMxA
EPWMxB
TZy
EPWMxSYNCI EPWMxSYNCO
TBCLK
Digital
Compare
Compare
Registers
Event Trigger
Compare
Registers
INPUT X-Bar
ePWM X-Bar
TZ1-TZ3
EPWMCLK
The dead-band sub-module provides a means to delay the switching of a gate signal, thereby
allowing time for gates to turn off and preventing a short circuit. This sub-module supports
independently programmable rising-edge and falling-edge delays with various options for
generating the appropriate signal outputs on EPWMxA and EPWMxB.
Motivation for Dead-Band
to power
switching
device
supply rail
gate signals are
complementary PWM
♦ Transistor gates turn on faster than they shut off
♦ Short circuit if both gates are on at same time!
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