TDA4AEN-Q1: Does EPWM support 500KHZ output

Hello Expert,

Any update? this is urgent for our design, please help to feedback asap. Thanks.

Hi, Diwakar

Cici is my customer, and both of us want to know the answer.

I think both the answer of Q1 & Q2 is yes, so this is just a double check.

Could you help us?

Thank You.

Gibbs

Hi Tarun

Thanks for your confirmation~

BTW, could you share whether the 500KHz signal have accuracy range? if yes, how about the range? also whether the accuracy related to E521.42 working load? Thanks~

Hello CiCi,

Since the system clock is 125 MHz, we have good range from few Hz to MHz.

Regards

Tarun Mukesh

Hi Tarun,

OK, got the method to set correct 500KHz, but I want to know the tolerance, when middle value is 500KHz, the tolerance will be +-0.1% or other? also whether TDA4AEN working load will impact this tolerance? thanks!

Hello,

Cici Liu said:

the tolerance will be +-0.1% or other? also whether TDA4AEN working load will impact this tolerance? thanks!

This point i need to check with hardware expert.

Regards

Tarun MUkesh

Hello,

I am from the hardware team. The ePWM output frequency does not have its own tolerance specification. The long-term frequency accuracy (ppm) is determined by the accuracy of the external crystal used on the board. The ePWM time-base clock is ultimately derived from the external reference through the PLLs. Essentially, the ePWM output would inherit approximately the same +-ppm accuracy of the external crystal. While PLLs introduce jitter, it is negligible relative to a 500kHz period.

Regarding system loading: By design, SoC workload does not affect the frequency accuracy once the module is configured. 

Regards,

Jeff