![background image](http://html1.mh-extra.com/html/texas-instruments/tms320x2823x/tms320x2823x_reference-manual_1095205070.webp)
CTR=zero
CTR=CMPB
X
En
SyncOut
Phase reg
Ext SyncIn
(optional)
EPWM1A
EPWM1B
SyncOut
Phase reg
CTR=CMPB
CTR=zero
X
En
EPWM2B
EPWM2A
Master2
Master1
SyncIn
CTR=zero
CTR=CMPB
SyncOut
X
EPWM3B
Phase reg
Master3
En
EPWM3A
1
2
3
Φ
=X
Φ
=X
Φ
=X
CTR=zero
CTR=CMPB
SyncOut
X
EPWM4B
Phase reg
Master4
En
EPWM4A
3
Φ
=X
Buck #1
Vout1
Vin1
EPWM1A
Buck #2
Vin2
EPWM2A
Vout2
Buck #4
Buck #3
Vin3
EPWM4A
Vin4
EPWM3A
Vout3
Vout4
SyncIn
SyncIn
SyncIn
Applications to Power Topologies
www.ti.com
Figure 49. Control of Four Buck Stages. Here F
PWM1
≠
F
PWM2
≠
F
PWM3
≠
F
PWM4
NOTE:
Θ
= X indicates value in phase register is a "don't care"
70
TMS320x2833x, 2823x Enhanced Pulse Width Modulator (ePWM) Module
SPRUG04A – October 2008 – Revised July 2009
© 2008–2009, Texas Instruments Incorporated