Need transformer design details for reference design PMP10974

Mizanur,

Thanks for your interest in this solution. Please see attached spec from Renco.RLTI-1139 DATASHEET.pdf

Best regards,

 

John Stevens

Texas Instruments Inc.

Systems and Applications Engineering Manager

SVA-HVPS-LPCC

12500 TI Blvd Dallas,TX 75243

Email: john.stevens@ti.com

Office: 214-567-5775 ||   Cell: 214-926-8213

Technical Resources E2E Forums

Thanks John for the document.

Unfortunately it does not have the required number of turns and wire gauge for the windings. Can you provide the information also ?

Best regards
Rahman

Rahman,

The turns ratio can be seen in the schematic at the top of the transformer. To confirm how that is specified and to determine wire gauge, I suggest contacting Renco directly. Their contact info is in the last attachment at the top.

Thanks John for your reply.

Previously I contacted Renco in this regard but didn't get any response.

Mizanur,

Happy new year!

I'm sorry to hear about the delay from Renco. It may be due to the holiday in US/Europe. Besides the engineering@rencousa.com you could also try this contact: Ian Rensing (IRensing@RencoUSA.com.

Ian has been great with some of our Dallas-based Power design teams and if he is not the guy I'm sure he will find out who is.

Please let me know if you don't hear back from them this week. I'm also curious why they don't have the transformer listed on the Renco website-that's something we need to get fixed for you.

Cheers!

John

Happy New Year John !

Thank you very much for your reply. I will reach Ian Rensing directly today and inform you what their response is.

BR,
Rahman

This was Ian's response-

"The construction details are proprietary as we provide our services to TI at no charge. If you need any assistance with safety agency approval please ask them to contact us directly."

Can you arrange to pick the info. ?

John,

Renco don't list this transformer on their site. How can I purchase ?

Thanks
Rahman

Rahman,
I would contact Renco, Ian or their general email from the transformer data sheet, explaining that you would like to purchase samples. Let me know if you run into any trouble.
Regards
John

Thanks John

Dear John Stevens

Thanks for your email reply.

I couldn't decede which design to choose yet and will start all over again.

The product that needs power supply is multi battery charger.

It will charge 15 batteries(capacity of 500 mAh) at the same time.

Charging IC's are BQ24040 and current limit will be set about 250 mA max.

Could you recommand any reference design?

UCC24630EVM-636 or PMP10974 or anything else?

Thank you.

Hyukjun

Hyukjun,
I support mainly just the AC/DC adapter portion but can connect you to the proper battery team as well if you have questions on the BQxxxx device.

For the AC/DC portion, are you requiring 85-265VAC (Universal Input)? What is the output voltage and max output current?

What is the application here? Do you have a Vout regulation requirement for steady state like 1% or 5%? Do you have certain transient current requirements where Vout has to stay within certain range from load step from x to y?

Do you have a standby power requirement?(little to no load power dissipation)

Regards,
John

Dear John
Thanks for help.
Answers are:
inpit voltage: 85-265VAC (Universal)
expected output voltage: 5V (4.45~6.45V)
max output current: 3.5A
application: supply power to charging IC
Vout: 4.45~6.45V (recommended operating condition of charging IC)
15 IC's operate at max

Charging IC wors fine.
Supply part failed and I am going to try again.

Thank you.
Best regards
Hyukjun

Hello John,

Could you send me the spec sheet of the following transformers-

RLTI-1083 of PMP8817
G144093LF of PMP10478
G154020LF of PMP11124
BCK2001-190 of PMP4478

Thanks
Rahman

Hyukjun,

sorry for the delay. I took a few days off work recently. Check out these reference designs that are closer to your requirements:

Or you can search your requirements to find other designs here:

Let me know if these are of interest and we can see if we have any boards still available.

Regards,

John

Mizanur,
Would you mind posting your question as a new thread?
Regards,
John

Sure John.

John Stevens

Thanks for your recommendation.

All design seems fine.  But difficult to buy the sample transformers in BOM , they are also not in online market.

So I'm going back to PMP10974 design.  After buying UCC24636DBV and RLTI-1139, I will try again.

I will send email if I get no result agian.

Thank you very much.

Hyukjun

 

Hyukjun,

sounds good. If you would like some contacts for those magnetics vendors to get you samples quickly, let me know. Feel free to start a discussion on e2e again after you build up boards and start testing.

Regards,

John

Hi John

Thanks for help. I left message at Renco homepage and asked Element14 for buying UCC24636 yesterday.
If I got no reply, I will ask for your help. Thanks again.

Best Regards

Hyukjun