PTxx Connect Inhibit pin on three modules

Jose Romero

Other Parts Discussed in Thread: PTH08080W, PTH08000W

I have there modules that I want to inhibit at the same time. I have two PTH08080W and one PTH080260. Can I connect the Inhibit pins together and control with one FET?

Thank you,

Jose

over 10 years ago

0 Tom Guerin over 10 years ago

TI__Mastermind 38230 points

Joe:

The PTH08000W must have a dedicated inhibit pin control FET for each module.

The inhibit pins must not be connected together. The PTH modules have their own internal pull-up. Do not place an external pull-up to this pin.

Tom

0 Jose Romero over 10 years ago in reply to Tom Guerin

Prodigy 120 points

Tom,

Thanks for the quick response. I don't have an external pull-up on any of the modules. All modules are power by the same source and I have one FET controlling the Inhibit on one of the supplies. Since they are all powered by the same supply, I thought I could use the same FET output to all three of my modules. My board is very tight so the would really save me.

Jose

0 Tom Guerin over 10 years ago in reply to Jose Romero

TI__Mastermind 38230 points

Thanks for the response.

The PTH08080W and PTH08000 require a separate inhibit , open drain FET control for each module.

There are some proection features, OCP over temperature protection which can be overstessed when using common connection , inhibit FET, for more than 1 unit.

Regards

tom

0 Jose Romero over 10 years ago in reply to Tom Guerin

Prodigy 120 points

OK, thanks

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PTxx Connect Inhibit pin on three modules