Texas Instruments Delfino C28346 DIM168 ControlCARD TMDSCNCD28346-168 TMDSCNCD28346-168 데이터 시트
제품 코드
TMDSCNCD28346-168
PWM
(B)
TZ
(A)
SYSCLK
t
w(TZ)
t
d(TZ-PWM)HZ
SPRS516D – MARCH 2009 – REVISED AUGUST 2012
6.11 Enhanced Control Peripherals
6.11.1 Enhanced Pulse Width Modulator (ePWM) Timing
PWM refers to PWM outputs on ePWM1–6.
shows the PWM timing requirements and
, switching characteristics.
Table 6-19. ePWM Timing Requirements
(1)
TEST CONDITIONS
MIN
MAX
UNIT
t
w(SYCIN)
Sync input pulse width
Asynchronous
2t
c(SCO)
cycles
Synchronous
2t
c(SCO)
cycles
With input qualifier
1t
c(SCO)
+ t
w(IQSW)
cycles
(1)
For an explanation of the input qualifier parameters, see
Table 6-20. ePWM Switching Characteristics
PARAMETER
TEST CONDITIONS
MIN
MAX
UNIT
t
w(PWM)
Pulse duration, PWMx output high/low
20
ns
t
w(SYNCOUT)
Sync output pulse width
8t
c(SCO)
cycles
t
d(PWM)tza
Delay time, trip input active to PWM forced high
no pin load
25
ns
Delay time, trip input active to PWM forced low
t
d(TZ-PWM)HZ
Delay time, trip input active to PWM Hi-Z
20
ns
6.11.2 Trip-Zone Input Timing
A.
TZ - TZ1, TZ2, TZ3, TZ4, TZ5, TZ6
B.
PWM refers to all the PWM pins in the device. The state of the PWM pins after TZ is taken high depends on the PWM
recovery software.
recovery software.
Figure 6-14. PWM Hi-Z Characteristics
Table 6-21. Trip-Zone Input Timing Requirements
(1)
MIN
MAX
UNIT
t
w(TZ)
Pulse duration, TZx input low
Asynchronous
1t
c(SCO)
cycles
Synchronous
2t
c(SCO)
cycles
With input qualifier
1t
c(SCO)
+ t
w(IQSW)
cycles
(1)
For an explanation of the input qualifier parameters, see
128
Electrical Specifications
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