UCC21710: APWM output specs ?

Jonathan Jank

Intellectual 1045 points

Part Number: UCC21710
Other Parts Discussed in Thread: UCC5870-Q1

It appears the datasheet doesn't specify the output levels of the APWM logic output.

Can you provide those?

We are looking for a Voh and Vol spec that shows output voltage at an output current

thanks,

over 3 years ago

0 Don Dapkus over 3 years ago

TI__Guru**** 189401 points

Hi, Jonathan,

Long time, no talk!

I checked our characterization data, and I didn't see this data.

My colleague may have more data, let me ask him and we will get back with you on Friday.

Best regards,

Don

0 Andy Robles over 3 years ago

TI__Genius 13760 points

Hi JJ,

The UCC217xx family actually uses the VCC power supply as the input to the buffer that outputs the APWM data. This means that the APWM output voltage = VCC.

Best regards,

Andy Robles

0 Jonathan Jank over 3 years ago in reply to Andy Robles

TI__Intellectual 1045 points

Hi Don,

Hope you are doing well. its been too long. Hope to see you in 2 weeks.

I would be OK with a good estimate. Maybe it is the same as UCC5871 SDO output? On UCC5871 it looks like this:

0 Andy Robles over 3 years ago in reply to Jonathan Jank

TI__Genius 13760 points

Hi Jonathan,

UCC217xx family and UCC5870-Q1 output data differently. To add some clarification the APWM output in UCC217xx is a CMOS based buffer and it should pullup all the way to VCC when its HIGH and pulldown all the way to ground when its LOW. For this reason we did not spec a Voh or Vol parameter for this driver.

Best regards,

Andy Robles

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UCC21710: APWM output specs ?