Bidirectional isolated DCDC

Kazuya Nakai59

Guru 21915 points

Hi guys,

One of my customers is interest in bidirectional isolated DCDC.

We found the following reference design as a reference.

2kW, 48V to 400V, >93% Efficiency, Isolated Bidirectional DC-DC Converter Reference Design for UPS

http://www.ti.com/tool/TIDA-00951

Do you have any other reference circuit?

Your reply would be much appreciated.

Best regards,

Kazuya Nakai.

over 8 years ago

0 Yunsheng Qu over 8 years ago

TI__Genius 9790 points

Hi, Kazuya

I guess you want the schematic of TIDA-00951, here it is.

www.ti.com/.../tidrr65.pdf

Regards,
Yunsheng

0 Kazuya Nakai59 over 8 years ago in reply to Yunsheng Qu

Guru 21915 points

Hi Yunsheng,

Thank you very much for the information.
And I'm sorry that my question was not clear.

I wanted to know whether TI has any other reference circuit or application note except TIDA-00951.
Do you know other bidirectional isolated DCDC reference design?

Thank you and best regards,
Kazuya Nakai.

0 Hrishi Nene over 8 years ago in reply to Kazuya Nakai59

TI__Genius 10820 points

Hello Mr. Nakai,

You can also refer to this microcontroller based TI design

Regards,

Hrishi

0 Kazuya Nakai59 over 8 years ago in reply to Hrishi Nene

Guru 21915 points

Hello Hrishi,

Thank you very much for the information.

I will introduce the TI Designs to the customer.

Thank you again and best regards,
Kazuya Nakai.

0 Ramesh Palanisamy over 8 years ago in reply to Kazuya Nakai59

Intellectual 620 points

Hello Yunsheng/Ramkumar,

Following to the previous discussion,i would like to post my following query.

I am also working with the same converter configuration where i am facing some issues with active clamp circuit.
Under No load condition,i could acheive the DC output of 400V with VDCin : 48V.
But when I loaded output with very small power ~ 120W,Clamp device is experiencing voltage spikes with high frequency ringing as shown in the Figure.Actually,it should not happen.

The loaded output power is very low ~ 120W with VDCin: 20V and VDCout:150V. Pls refer the below circuit & waveforms for main devices & active clamp device attached.