LM5170-Q1: How do I design a circuit to drive a four-phase buck mode?

Tony Han

Part Number: LM5170-Q1
Other Parts Discussed in Thread: LM5170, , LM5171, TINA-TI

Tool/software:

Hello Sir,

I have already confirmed the 2-Phase Buck mode operation using the LM5170 device through the TINA Simulation data of the existing TI Forum.

Since then, a 4-Phase configuration has been required to obtain a higher output value, but it has not proceeded because it is difficult to write about the design of the simulation circuit.

Also, I checked the manual of LM5170-Q1 EVM, but I was unable to design the simulation circuit.

So I'm wondering how to design the TINA circuit. Of course, I know that I have to use two LM5170 devices.

Please Let me know that...

Thank you,

Best Regards,

over 1 year ago

0 Feng Ji over 1 year ago

TI__Mastermind 22215 points

Hi Tony,

LM5171 is the successor of LM5170, consider LM5171 if possible.

And you may find the jumper settings of LM5171 4 phase operation in LM5171EVM user's guide.

Best Regards,

Feng

0 Tony Han over 1 year ago in reply to Feng Ji

Prodigy 20 points

Hi Feng

Long time no see!!

You means, LM5171 is recent controller and It's better than LM5170 right?

I'll consider that after the TINA-TI Simulation..

I want to know the simulation circuit design about 4-phase buck converter by TINA-TI..

Can you give me an advice?

0 Feng Ji over 1 year ago in reply to Tony Han

TI__Mastermind 22215 points

Hi Tony,

Yes, please consider LM5171 first if it is a new design.

You may follow the schematic of LM5171 4 phase operation in LM5171EVM user's guide section 2.4.5 2-EVM Daisy-Chain for 3 or 4-Phase Operation.

Best Regards,

Feng

0 Tony Han over 1 year ago in reply to Feng Ji

Prodigy 20 points

I check the Section 2.4.5 in EVM manual,

But I don't know how to describe the distinction between master board and slave board.

Also, How can I design J17, J18 60-Pin in TINA simulation....?

Can I get a sample TINA file about 4-Phase buck converter?

I'm Sorry....

Thank you,

Best regards...

+1 Feng Ji over 1 year ago in reply to Tony Han

TI__Mastermind 22215 points

Hi Tony,

The jumpers show you how to connect the signals from the main EVM to the secondary EVM.

In general, use the voltage loop of the main board and send ISET to the secondary EVM. And use SYNC for 4 phase operation.

Best Regards,

Feng Ji

0 Tony Han over 1 year ago in reply to Feng Ji

Prodigy 20 points

Thank you Feng,

I'll try to design the 4-Phase Buck converter by Tina.

Best Regards,

Tony Han

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LM5170-Q1: How do I design a circuit to drive a four-phase buck mode?