Datasheet

Figure 51-14. Half-Bridge Converter Application: Feedback Regulation
C
OUT
PWMxH
C
1
V
IN
V
DC
V
OUT
D
1
L
C
2
PWMxL
D
2
PWM
CONTROLLER
PWMx outputs
x =
[1..2]
PWM Channel x Period
Output Waveform PWMxH
DTHI (PWM_CMRx) = 0
DTH (PWM_DTx) = 0
Output Waveform PWMxL
DTLI (PWM_CMRx) = 1
DTL (PWM_DTx) = 0
Even cycle Even cycle Even cycleOdd cycle Odd cycle
PPM (PWM_CMRx) = 1
CPOL (PWM_CMRx) = 1
DPOLI (PWM_CMRx) = 1
MODE (PWM_ETRGx) = 3
V
OUT
Error
Amplification
V
REF
V
REF
CDTY (PWM_CDTYx)
CDTY (PWM_CDTYx)
Isolation
PWM Conf guration
+
+
+
PWMEXTRGx
x
= [1..2]
51.6.2.6 Output Override
The two complementary outputs DTOHx and DTOLx of the dead-time generator can be forced to a value defined by
the software.
Figure 51-15. Override Output Selection
DTOHx
OOVHx
OOOHx
OSHx
0
1
DTOLx
OOVLx
OOOLx
OSLx
0
1
The fields OSHx and OSLx in the PWM Output Selection Register
(PWM_OS) allow the outputs of the dead-time
generator DTOHx and DTOLx to be overridden by the value defined in the fields OOVHx and OOVLx in the PWM
Output Override Value Register (PWM_OOV).
The set registers PWM Output Selection Set Register (PWM_OSS) and PWM Output Selection Set Update Register
(PWM_OSSUPD) enable the override of the outputs of a channel regardless of other channels. In the same way, the
SAM E70/S70/V70/V71 Family
Pulse W
idth Modulation Controller (PWM)
© 2019 Microchip T
echnology Inc.
Datasheet
DS60001527D-page 1564