UCD3138: UCD3138 current share Document

Masazumi Ishii

Part Number: UCD3138

Hello.

We are considering UCD3138.
I have a question.
Do you have the following application notes or Document?
１　Analog bus current share.
２　PWM bus current share.
３　Master / slave current share.

Thank you.

over 8 years ago

0 Brian Johnson96 over 8 years ago

TI__Expert 3200 points

Hi Masazumi, An AE will respond to your E2E question soon.

0 Ian Bower over 8 years ago in reply to Brian Johnson96

TI__Genius 17090 points

3465.UCD31xx Current Sharing Application note.pdfHere's a preliminary guide to how to use the built-in hardware to assist current share. It does support analog master and slave, and there is a PWM involved, so in some ways it answers all your questions, although I'm not sure what you mean by PWM current share.

0 Masazumi Ishii over 8 years ago in reply to Ian Bower

Genius 3945 points

Hello.

I have additional questions regarding UCC3138.

1 Please let me know the maximum parallel operation in each mode such as average current mode,
master slave mode etc.
Is it possible to operate 12 units in parallel?

２　In average current mode, one unit operating in parallel will fail.
In this case, it seems that it can operate normally if the share bus is connected.
Is this idea correct?

３　I want to realize parallel operation and redundant operation.
In this case, I think that master slave mode is the best.
Is it OK?

４　Do I need to consider the total capacitance（ total capacity on the circuit） on the external capacitor capacitor?
For example, 0.033 uF for one. 0.099 uF when 3 units in parallel, 0.396 uF in 12 units in parallel.
Is this way of thinking OK?

thank ypu.

Power management

Power management forum

UCD3138: UCD3138 current share Document