Epwm1 Configured As A Typical Master, Epwm2 Configured As A Slave - Texas Instruments Concerto F28M35 Series Technical Reference Manual

Applications to Power Topologies
Figure 7-56. EPWM1 Configured as a Typical Master, EPWM2 Configured as a Slave
Master
Phase reg
EN
Φ=0°
CTR=0
CTR=CMPB
X
1
7.3.3 Controlling Multiple Buck Converters With Independent Frequencies
One of the simplest power converter topologies is the buck. A single ePWM module configured as a
master can control two buck stages with the same PWM frequency. If independent frequency control is
required for each buck converter, then one ePWM module must be allocated for each converter stage.
Figure 7-57 shows four buck stages, each running at independent frequencies. In this case, all four ePWM
modules are configured as Masters and no synchronization is used.
generated by the setup shown in
are four stages.
708
C28 Enhanced Pulse Width Modulator (ePWM) Module
Ext SyncIn
(optional)
SyncIn
EPWM1A
EPWM1B
SyncOut
Figure 7-57; note that only three waveforms are shown, although there
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Slave
Phase reg
SyncIn
EN
Φ=0°
CTR=0
CTR=CMPB
X
2
SyncOut
Figure 7-58
SPRUH22I – April 2012 – Revised November 2019
www.ti.com
EPWM2A
EPWM2B
shows the waveforms
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