TIDA-010071: Not getting output power

Tarun Kumar2

Part Number: TIDA-010071

Hello,

I am working on TIDA-010071 for relay switching, But I`m not getting output power from the power supply section. I`m providing 230V AC i/p supply to the circuit.

I have used transformer 750344604(datasheet attached) to meet my required power ratings{(13V,1.2A)(5V,0.5A)(-12V,0.3A)}. Firstly, I have not made any change in the power section rather than changing the transformer, but i didn`t get output power, then I have made some changes, like I have change the value of Rs1- 59k to 120k, Rs2- 20k to 56k and Rlc- 1.10k to 4.7k for Vs and Cs pins of UCC28740DR.

The only fluctuating 6V to 17V voltages i`m getting on VDD pin of UCC28740DR.

Please help out to get the output power

Regards

Tarun Kumar

over 5 years ago

0 Tarun Kumar2 over 5 years ago

Prodigy 210 points

Dear Members,

Waiting for your response, your valuable suggestions will be helpful for me.

Best Regards

Tarun Kumar

0 Harish Ramakrishnan5 over 5 years ago in reply to Tarun Kumar2

TI__Mastermind 24375 points

Hi Tarun,

Thank you for the question. I will look into the circuit and be back with my inputs. In the meantime, can you confirm if you have correct polarity on the windings of the transformer?

Thank you

0 Tarun Kumar2 over 5 years ago in reply to Harish Ramakrishnan5

Prodigy 210 points

Hello Sir,

Yes, we have the correct polarity on the windings of the transformer.

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TIDA-010071: Not getting output power