Dead_Band Submodule - Texas Instruments Concerto F28M36 Series Technical Reference Manual

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7.2.5 Dead-Band Generator (DB) Submodule

illustrates the dead-band submodule within the ePWM module.

Digital Compare

Purpose of the Dead-Band Submodule

The "Action-qualifier (AQ) Module" section discussed how it is possible to generate the required dead-

band by having full control over edge placement using both the CMPA and CMPB resources of the ePWM

module. However, if the more classical edge delay-based dead-band with polarity control is required, then

the dead-band submodule described here should be used.

The key functions of the dead-band module are:

Generating appropriate signal pairs (EPWMxA and EPWMxB) with dead-band relationship from a

single EPWMxA input

Programming signal pairs for:

– Active high (AH)

– Active low (AL)

– Active high complementary (AHC)

– Active low complementary (ALC)

Adding programmable delay to rising edges (RED)

Adding programmable delay to falling edges (FED)

Can be totally bypassed from the signal path (note dotted lines in diagram)

Dead band Submodule Additonal Operating Modes

On type 1 ePWM RED could appear on one channel output and FED could appear on the other channel

The following list shows the distinct difference between type 1 and type 2 modules with respect to Dead

Band operating modes

SPRUHE8E – October 2012 – Revised November 2019

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Figure 7-30. Dead_Band Submodule

Counter Compare

Digital Compare

Digital Compare

C28 Enhanced Pulse Width Modulator (ePWM) Module

ePWM Submodules

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