LM5190-Q1: LM5190-Q1 Constant current output

Chen Alex1

Genius 3055 points

Part Number: LM5190-Q1
Other Parts Discussed in Thread: LM5190, LM5143, LM5149, LM5148

Tool/software:

hi Sir

I need to design an Constant current output circuit to driver Laser diode

1.Vin =24V，48v is best

2.Vout = 5V/30A，60A is best

did the LM5190 is best solution? or others advise?

thanks

3 months ago

0 EricLee 3 months ago

TI__Guru 52451 points

Hello Chen

LM5190 is the best solution for the high voltage CCCV application. However, optimizing thermal performance of your converter is important since the output current is high and the efficiency is low in your application. Please use the Quick Start and check your estimated efficiency. https://www.ti.com/tool/download/LM25190-LM5190-DESIGN-CALC

-EL

0 Chen Alex1 2 months ago

Genius 3055 points

hi EL

I need to design a power stage, vin :48v, vout :5v/60A

LM5190 can do it?

or LM5190 *2 to support the 300w output together?

thanks

0 EricLee 2 months ago in reply to Chen Alex1

TI__Guru 52451 points

Hello Chen

In this case, I think you have to use a dual-phase controller like as LM5143 and populate CCCV circuit externally.

-EL

0 Chen Alex1 2 months ago in reply to EricLee

Genius 3055 points

hi EL

LM5149 or LM5143 Can Parallel output ?

vin :48v, vout :5v/60A

0 EricLee 2 months ago in reply to Chen Alex1

TI__Guru 52451 points

Hello Chen

LM5148 is stackable up to two phases. LM5143 is two channel device which supports dual-phase.

If you have a question about LM5148 or LM5143. Please create a new post.

-EL

0 Chen Alex1 2 months ago in reply to EricLee

Genius 3055 points

hi sir

You mentioned the “populate CCCV circuit externally” <= have any document? thanks

0 EricLee 2 months ago in reply to Chen Alex1

TI__Guru 52451 points

Hello Chen

Please refer https://www.ti.com/lit/an/snvaa85/snvaa85.pdf

-EL

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LM5190-Q1: LM5190-Q1 Constant current output