Author Topic: Cross for OB2358AP?  (Read 1951 times)

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Offline dietz

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Cross for OB2358AP?
« on: June 07, 2016, 01:58:13 am »
Hi everyone, long time lurker finally posting!

Over the weekend my audio receiver let a bit of the magic smoke out, which turned out to be the offline PWM power switch on the SMPS board. I've identified it as OB2358AP, but I was wondering if anyone is familiar with a drop-in replacement from a reputable brand. I'd prefer not to put another wun-hung-low chip back in if possible, but it looks like that may be the only choice I have.

Cheers!
 

Online Tomorokoshi

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Re: Cross for OB2358AP?
« Reply #1 on: June 07, 2016, 04:14:25 am »
No crosses, but it seems to be active. No suppliers.

Seems to be available from the manufacturer here:
http://www.on-bright.com/cn/english/contact.htm
http://www.on-bright.com/cn/english/products/products_OB235X.htm

A PDF datasheet doesn't seem to be available.

What made it blow out?
 

Offline dietz

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Re: Cross for OB2358AP?
« Reply #2 on: June 07, 2016, 05:16:12 am »
Thanks. The manufacturer of the receiver offered to sell me a few, but I was kind of hoping to be able to put bit better part in to prevent this down the road.

As for what happened, not a clue. Powered it up, big pop, the smell of n-type in the air... After I get my hands on a few more of these I'll be able to see what kind of damage (hopefully nothing) the amplifier stage took, but everything looked OK...
 

Online Tomorokoshi

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Re: Cross for OB2358AP?
« Reply #3 on: June 07, 2016, 11:48:24 am »
Perhaps throw a MOV in before the bridge. Also check the DC capacitor in case it shorted.
 


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