UCC28C41-Q1: Not getting desired output signal

Abhilash Sirpa

Part Number: UCC28C41-Q1

Hello,

Iam using UCC28C41-Q1 for an application which requires 40KHz with 50% duty cycle (the requirement is only for safety and logic ) i just need pulse output no need of feedback.

we have following circuit, but not getting any output signal in Tina and also PSPICE

over 4 years ago

0 Peter Meaney over 4 years ago

TI__Mastermind 31580 points

Hi Abhilash,

Sorry for the long delay in replying to your post, your schematic looks ok, can you share you simulation file and we can try and run it.

Regards

Peter

0 Abhilash Sirpa over 4 years ago in reply to Peter Meaney

Prodigy 80 points

UCC28C4X.zip

0 Teng Feng over 4 years ago in reply to Abhilash Sirpa

TI__Genius 13660 points

Hi Abhilash,

I have tested your circuit in TINA. It runs good.

Please see below simulation model and simulation results. and I also attached simulation model for your testing.

UCC28C41_STEADY.TSC

Regards,

Teng

0 Peter Meaney over 4 years ago in reply to Abhilash Sirpa

TI__Mastermind 31580 points

My PSPICE program, cadence, will not open the dsn file, can you post that separately ?

Thanks

Peter

0 Abhilash Sirpa over 4 years ago in reply to Teng Feng

Prodigy 80 points

Thank you

0 Peter Meaney over 4 years ago in reply to Peter Meaney

TI__Mastermind 31580 points

Hi Abhilash,

I got Cadence to open the PSPICE dsn file and the COMP pin is tied yo ground, this will disable switching. Nromally for open loop you leave the COMP pin open circuit, to satisfy the PSOICE netlist, I suggest you tie COMP to ground through a 100k resistor.

Regards

Peter

0 Abhilash Sirpa over 4 years ago in reply to Peter Meaney

Prodigy 80 points

Hi Peter,

Thank you for your reply.

Regards,

Abhilash

0 Abhilash Sirpa over 4 years ago in reply to Peter Meaney

Prodigy 80 points

Hello Peter,

Can you please share simulation file , I am still not getting desired output.

Regards,

Abhilash

0 Peter Meaney over 4 years ago in reply to Abhilash Sirpa

TI__Mastermind 31580 points

Hi Abhlish,

I have attached a zip file with all the files.

Regards

Peter7183.UCC28C4X.zip

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UCC28C41-Q1: Not getting desired output signal