CTR=zero
CTR=CMPB
X
En
Φ=0°
SyncOut
Phase reg
Ext SyncIn
(optional)
EPWM1A
EPWM1B
SyncOut
Phase reg
CTR=CMPB
CTR=zero
X
Φ=X
En
EPWM2B
EPWM2A
Slave
Master
Buck #1
Vout1Vin1
EPWM1A
Buck #2
Vin2
EPWM1B
Vout2
Buck #4
Buck #3
Vin3
EPWM2B
Vin4
EPWM2A
Vout3
Vout4
SyncIn
SyncIn
www.ti.com
Applications to Power Topologies
279
SPRUI07–March 2020
Submit Documentation Feedback
Copyright © 2020, Texas Instruments Incorporated
Enhanced Pulse Width Modulator (ePWM) Module
3.3.4 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 3-49 shows such a configuration; Figure 3-50 shows the waveforms generated by
the configuration.
Figure 3-49. Control of Four Buck Stages. (Note: F
PWM2
= N x F
PWM1
)
To Next Page
Loading...
Need help?
General
