Author Topic: Drop-in replacement for LM2576HVS-ADJ  (Read 1897 times)

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Offline PinheadBETopic starter

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Drop-in replacement for LM2576HVS-ADJ
« on: March 07, 2022, 03:18:36 pm »
Hi,

I have a defective LM2576HVS-ADJ to replace in a studio DMX spotlight.
Given that this part has become now unobtainium, I was wondering:

1°) If I replace it with a LM2596HVS-ADJ, do I have to replace the output inductance with another value ?
2°) Where could I reliably source a LM2576HVS-ADJ (preferably) or a LM2596HVS-ADJ (Not EBay, nor Ali, nor ....)

Thanks for your input

EDIT: The input voltage is a solid 48 V.  That's the reason I absolutely need a HV version of the chip
« Last Edit: March 07, 2022, 03:32:57 pm by PinheadBE »
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Offline madires

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Re: Drop-in replacement for LM2576HVS-ADJ
« Reply #1 on: March 07, 2022, 03:34:49 pm »
The LM2596 has a switching frquency of 150kHz vs. LM2576's 52kHz. So I'd assume you need to adjust the inductance (see the LM2596's datasheet for choosing the correct value).
 

Offline thm_w

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Re: Drop-in replacement for LM2576HVS-ADJ
« Reply #2 on: March 08, 2022, 12:22:50 am »
Looks like LCSC has a clone version: https://lcsc.com/product-detail/DC-DC-Converters_HGSEMI-LM2596HVS-ADJ-TR_C356713.html

Another option is to just get rid of the original circuit and wire in a different module.
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Offline Someone

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Re: Drop-in replacement for LM2576HVS-ADJ
« Reply #3 on: March 08, 2022, 02:18:37 am »
I have a defective LM2576HVS-ADJ to replace in a studio DMX spotlight.
Given that this part has become now unobtainium, I was wondering:
Multiple stockists are showing availability for that part, even if you only want single quantities:
https://octopart.com
Or use a non-adjustable version and change the feedback.
 


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