Control Of Four Buck Stages; Pwm1 ); Pwm2 Pwm1 - Texas Instruments Concerto F28M35 Series Technical Reference Manual

Applications to Power Topologies
7.3.4 Controlling Multiple Buck Converters With Same Frequencies
If synchronization is a requirement, ePWM module 2 can be configured as a slave and can operate at
integer multiple (N) frequencies of module 1. The sync signal from master to slave ensures these modules
remain locked. Figure 7-59
the configuration.
Figure 7-59. Control of Four Buck Stages. (Note: F
Master
Phase reg
En
Φ=0°
CTR=zero
CTR=CMPB
X
SyncOut
Slave
Phase reg
En
Φ=X
CTR=zero
CTR=CMPB
X
SyncOut
712
C28 Enhanced Pulse Width Modulator (ePWM) Module
shows such a configuration;
Ext SyncIn
(optional)
SyncIn
EPWM1A
EPWM1B
SyncIn
EPWM2A
EPWM2B
Copyright © 2012–2019, Texas Instruments Incorporated
Figure 7-60 shows the waveforms generated by
PWM2
Vin1
EPWM1A
Vin2
EPWM1B
Vin3
EPWM2A
Vin4
EPWM2B
SPRUH22I – April 2012 – Revised November 2019
www.ti.com
= N x F )
PWM1
Vout1
Buck #1
Vout2
Buck #2
Vout3
Buck #3
Vout4
Buck #4
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