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LM22675: Could you tell me about "how to use LM22675's Inverting-Buck " ?

Genius 4695 points

Replies: 4

Views: 359

Part Number: LM22675

Hi, team.

My customers are considering inverting power supply by the specification below.

<Customer specification>

Input:20V~25V

Output:-12V / 0.3A

Because customers' reasons, would like to use LM22675 that has been used in the past.

So question.

Question 1: Can I use LM22675 with customer specifications?

Question 2: If "YES", is there a reference circuit diagram for this device?

Could you help me?

Best regards,

Masumi Sekiguchi

  • Hello,
    Quick calculations shows that your customer should be able to use LM22675 for the application above.
    It should be noted that maximum expected voltage on device is 37V (this is 42 V rated device), so caution is advised if line transients >42V are expected.

    As far as component calculations are concerned there is application note available with detailed step by step description for creating inverting power supply.
    Here is link
    www.ti.com/.../slva317b.pdf

    Hope this helps
    Regards
    Brani
  • In reply to Brani Dubocanin:

    Thank you for your answer.

    I heard from the customer that the Input Voltage worst condition turned out to be 36.66 V.

    So, I will introduce LM5160A now.


    Q: Is it available?

    Please tell me.
    Pokkun(Masumi Sekiguchi)
  • In reply to Pokkun:

    Sorry, can you check again with the following question?

    I heard from the customer that the Input Voltage worst condition turned out be 36.66 V.

    So, I'm proposing LM5161 now.
    ※ Because the customer said want to have feet packages.

    Q: Is LM5161 available?

    Please tell me.
    Pokkun (Masumi Sekiguchi)

  • In reply to Pokkun:

    Hello Sekiguchi-san,
    Yes LM5161 is released and available.
    Regards
    Brani

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