LM5170EVM-BIDIR: Looking at using this part and starting with the evm

jonathan eagle46

Part Number: LM5170EVM-BIDIR
Other Parts Discussed in Thread: LM5170, LM5176, LM25117

My specs are as follows, and each direction switching is not critical in terms of timing.

I understand that I may to modify the evm to support the current and target voltages.

Will this evm support this?

portA	direction	portB
15-24v	>	25v	5A max
25v	<	5-54v	30A max

over 7 years ago

0 Youhao Xi over 7 years ago

TI__Guru* 78070 points

The 1st line should be okay, and A to B you can do boost. However, the 2nd line requires a buck-boost, because A is in the mid of B range. The LM5170 run buck in one direction and boost in the other direction, but it cannot do buck-boost in any direction.

0 jonathan eagle46 over 7 years ago in reply to Youhao Xi

Prodigy 20 points

Youhao, Thank you. I had thought it could do buck boost. It seems that I could put a buck boost in parallel with a buck , both of which could be disabled/enabled. Do you have any suggestions?
Jonathan

0 Youhao Xi over 7 years ago in reply to jonathan eagle46

TI__Guru* 78070 points

Your idea should work. Buck you may consider LM25117, and the buck-boost you may consider the LM5176.

Power management

Power management forum

LM5170EVM-BIDIR: Looking at using this part and starting with the evm