AM1808AZCED3 datasheet(237/264 Pages) TI

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AM1808

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SPRS653A – FEBRUARY 2010 – REVISED APRIL 2010

6.29.1 Enhanced Pulse Width Modulator (eHRPWM) Timing

PWM refers to PWM outputs on eHRPWM1-6. Table 6-126 shows the PWM timing requirements and

Table 6-127, switching characteristics.

Table 6-126. Timing Requirements for eHRPWM

PARAMETER

TEST CONDITIONS

1.3V, 1.2V, 1.1V, 1.0V

UNIT

MIN

MAX

tw(SYNCIN)

Sync input pulse width

Asynchronous

2tc(SCO)

cycles

Synchronous

2tc(SCO)

cycles

Table 6-127. Switching Characteristics Over Recommended Operating Conditions for eHRPWM

PARAMETER

TEST

1.3V, 1.2V

1.1V

1.0V

UNIT

CONDITIONS

MIN

MAX

MIN

MAX

MIN

MAX

tw(PWM)

Pulse duration, PWMx output

26.6

high/low

tw(SYNCOUT)

Sync output pulse width

8tc(SCO)

cycles

td(PWM)TZA

Delay time, trip input active to

no pin load; no

PWM forced high

additional

Delay time, trip input active to

programmable

PWM forced low

delay

td(TZ-PWM)HZ

Delay time, trip input active to

no additional

PWM Hi-Z

programmable

delay

Peripheral Information and Electrical Specifications

237

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