UCC29002: Check the block diagram

Louis Han15

Genius 4680 points

Part Number: UCC29002

Hello

The customer wants to use UCC29002 for two DC/DC converters.

DC/DC converter datasheet and system block diagram are attached.

Could I use it with the attached system block diagram?

PKJ4000Series-700W_FlexTS (002).pdf

Best Regards.

over 5 years ago

0 Teng Feng over 5 years ago

TI__Genius 13660 points

Hi Louis,

This is a constant voltage controlled converter, it can use UCC29002 to realize the current share.

But the maximum VDD of the UCC29002 is 15 V, which is smaller than the output voltage of this converter. For higher-voltage applications, use the application solution as attached circuit.

Regards,

Teng
3580.0676.UCC29002.pdf

0 Louis Han15 over 5 years ago in reply to Teng Feng

Genius 4680 points

Hi Teng

Thanks for your support

How much is the value of Divider Resistor when Output Voltage is 28V?

Best Regards

0 Teng Feng over 5 years ago in reply to Louis Han15

TI__Genius 13660 points

Hi Louis,

Current Sense can be High Side or Low Side, normally Low side is a better choice, since it is easier to measure the voltage drop across the shunt resistor if it is on the low side. I'd recommend low side sensing.

In the last attached circuit, it is a high side sensing, the divider resisters in the circuit are the resisters of difference error amplifier . A user guide of high side sensing for your reference.

https://www.ti.com/lit/ug/sluu166a/sluu166a.pdf?ts=1588143605248

https://www.ti.com/lit/an/slua270a/slua270a.pdf?ts=1588143408175

You can refer the figure 5 for low side sensing application.

Regards,

Teng

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UCC29002: Check the block diagram