UCD3138: Schematic of bidirectional DCDC converter controlled using UCD3138

chenqiang jia

Part Number: UCD3138

Hi,

I was recently reading an article about a bidirectional DCDC converter controlled by UCD3138（SLUA765A），I saw a lack of description of the converter schematic in the article.

So I wonder if you can provide the PCB schematic of this converter？I want to figure out how the UCD3138 samples its voltage and current.

thanks.

over 5 years ago

0 Swaminathan Ramanathan75031 over 5 years ago

TI__Expert 6575 points

Hi,

The schematic and firmware is available on the TI design page at http://www.ti.com/tool/TIDA-00653

Please take a look and let me know if you have any questions.

Regards,

Swami

0 chenqiang jia over 5 years ago in reply to Swaminathan Ramanathan75031

Intellectual 270 points

Hi,

This is exactly what I want.

Thanks.

0 chenqiang jia over 5 years ago in reply to Swaminathan Ramanathan75031

Intellectual 270 points

Hi,

Can you explain to me how the sampling scale is determined?

The input voltage sampling ratio is 1.1 / 34.1?

The sampling ratio of the output voltage is 1 / 9.06?

How many times does the current sample amplify the voltage signal?

Because I'm designing a converter myself, I wonder if the setting of these ratios will greatly affect the sampling accuracy?

Thanks.

0 chenqiang jia over 5 years ago in reply to chenqiang jia

Intellectual 270 points

The answer is here：https://e2e.ti.com/support/tools/sim-hw-system-design/f/234/t/890947

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UCD3138: Schematic of bidirectional DCDC converter controlled using UCD3138