LM5050-1: LM5050-1

Farzaneh Faridi

Part Number: LM5050-1
Other Parts Discussed in Thread: TPS2121, TPS2120, LM5050-2, LM5060

Dear Sirs:

I need a chip as a prioritizer. There are a main power supply and batteries which are considered to supply the system. This chip should allow supplying by the main power supply unless its voltage goes under 18 volts, in this case I want this chip to be able to switch to batteries for supplying the system.

I have studied the chip “LM5050”. It’s quiet adequate for my purpose, but I couldn't understand how can I control the enabling of the chip. I understood that I need 2 chips separately, do I need any comparator in between? Can you suggest me some docs that could help me?

Thanks in advance

Farzaneh

over 5 years ago

0 Karikalan Selvaraj over 5 years ago

TI__Genius 16305 points

LM5050 is not be suitable for priority power mux, because it is power ORing device and the power source with higher supply voltage will always power the entire load.

TPS2121 or TPS2120 can be used for 4A application.

For detailed information, refer to the Power MUX application note "http://www.ti.com/lit/an/slvae51/slvae51.pdf"

Regards,

Kari.

0 Farzaneh Faridi over 5 years ago in reply to Karikalan Selvaraj

Intellectual 615 points

Hello Kari,

I checked what you offered me, they can not support my expectations. I need a kind of chip (maybe with an external MOSFET) with input voltage of around 60V and maximum current of 10A.

I searched a bit but still nothing found. I will appreciate it if you can tell me your idea.

Thanks

Farzaneh

0 Karikalan Selvaraj over 5 years ago in reply to Farzaneh Faridi

TI__Genius 16305 points

Hi Farzaneh,

Yes, for 10A we need to go with MOSFETs external.

Let me get back in detail next week, if that is okay.

If you need a speedy response let us know.

Regards,

Kari.

0 Farzaneh Faridi over 5 years ago in reply to Karikalan Selvaraj

Intellectual 615 points

Hi Kari,

I will wait for your kindly response next week.

Thanks a lot

Farzaneh

0 Karikalan Selvaraj over 5 years ago in reply to Farzaneh Faridi

TI__Genius 16305 points

For 10A priority power mux applications with upto 60V operation, we need to use LM5050-2 along with LM5060 for power mux application.

LM5050-2 provides reverse current blocking (or diode ORing functionality) and LM5060 is used to cutoff power path when the primary (priority) supply voltage is less than the second aux supply and still we need to power from primary; second path needs to be cutoff using LM5060.

Primary IN1 --> LM5050-2 --> LM506 to load.

secondary IN2 --> LM5050-2 ---> LM5060 to load.

When IN1 is present and above threshold (say 18V), LM5060 in the second path can be turned off using EN pin of LM5060.

Regards,
Kari.

0 Farzaneh Faridi over 5 years ago in reply to Karikalan Selvaraj

Intellectual 615 points

Hello Kari,

thanks for your response I´m working on your suggestion. Later I will tell you if it can be applied on my design or not.

Thanks a lot

Farzaneh

0 Karikalan Selvaraj over 5 years ago in reply to Farzaneh Faridi

TI__Genius 16305 points

Hello Farzaneh,

We understand your question is answered and would like to close the thread.

However when you have more questions on this thread we can reopen the thread or a new one referring to this one.

If you think your question is answered, click "this resolved my issue" button.

Regards,
Kari.

0 Farzaneh Faridi over 5 years ago in reply to Karikalan Selvaraj

Intellectual 615 points

Thanks

Power management

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LM5050-1: LM5050-1