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.
shows such a configuration;
shows the waveforms generated by the
configuration.
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
Vout1
Vin1
EPWM1A
Buck #2
Vin2
EPWM1B
Vout2
Buck #4
Buck #3
Vin3
EPWM2B
Vin4
EPWM2A
Vout3
Vout4
SyncIn
SyncIn
Figure 3-56. Control of Four Buck Stages. (Note: F
PWM2
= N x F
PWM1
)
Enhanced Pulse Width Modulator (ePWM) Module
SPRUH18I – JANUARY 2011 – REVISED JUNE 2022
TMS320x2806x Microcontrollers
307
Copyright © 2022 Texas Instruments Incorporated
Содержание TMS320 2806 Series
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