LM5020: Transforme Design Specification: PMP10195: Three-Phase AC and DC Input to 24V at 125mA Quick-Startup Isolated Flyback Reference Design

Ashish Agarwal49

Part Number: LM5020
Other Parts Discussed in Thread: PMP10195

Hi,

I am working on the above mention reference design, but transformer design specs is not available in the technical documents. Can it be shared, so that design can be finalized. Secondly, this design has out voltage of 24V and 125 mA, can it be modified such that output is 12V and 250 mA.

Regards

Ashish

over 7 years ago

0 Garrett Roecker over 7 years ago

TI__Mastermind 21720 points

Hi Ashish,

I am checking with the original engineer to find the specifications for the transformer.

The design can be change to meet the 12V @ 250mA requirement. A few things will need to be changed
1. Change the feedback resistors to properly set to the output to 12V
2. Ensure the transformer can handle the current (Once I get you the specification)
3. Make sure the current sense resistor is not triggering current limit early
4. Ensure that the control loop is stable

Thanks,

Garrett

0 Ashish Agarwal49 over 7 years ago in reply to Garrett Roecker

Prodigy 60 points

Thanks Garrett. Please see if the transformer specification can be shared asap.

0 Garrett Roecker over 7 years ago in reply to Ashish Agarwal49

TI__Mastermind 21720 points

HI Ashish,

The fastest way to get the information for the transformer is going to be contacting the vendor directly. Please tell them that you are looking at the TI reference design PMP10195.

GCI Technologies: EFT15R15-S525

Thanks,

Garrett

0 Ashish Agarwal49 over 7 years ago in reply to Garrett Roecker

Prodigy 60 points

Dear Garnett,

This part number is not available on GCI website. If you are not getting it in your inventory, can somebody in your team help in redesign and share. Otherwise, this application note will be of little use to us.

Regards

Ashish

0 Garrett Roecker over 7 years ago in reply to Ashish Agarwal49

TI__Mastermind 21720 points

Anish,

Please contact GCI for more information about the transformer. It will probably be necessary to send them an email.

Thanks,

Garrett

0 Yesaiahu Redler over 7 years ago in reply to Garrett Roecker

Intellectual 490 points

hi Garrett.
Can you choose and qualify another transformer vendor? GCI website do not contain the transformer data sheet, and it is difficult to design a new product with out a solid transformer vendor.

0 Garrett Roecker over 7 years ago in reply to Yesaiahu Redler

TI__Mastermind 21720 points

Yesaiahu,

Please contact GCI support directly for the datasheet.

Thanks,

Garrett

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LM5020: Transforme Design Specification: PMP10195: Three-Phase AC and DC Input to 24V at 125mA Quick-Startup Isolated Flyback Reference Design