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Old 01-19-2022, 08:12 PM   #1
dkneyle
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Default STR2A153 vs STR2A153D SMPS IC

The device I want to replace does not have the 'D' suffix, but the replacement I have in my parts drawer does have the 'D'.

I can't find any specific datasheet on the net for a 'D' variant. Do you reckon it's just slightly spec'd up and hence the designation: D?
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Old 01-20-2022, 01:57 AM   #2
sam_sam_sam
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Default Re: STR2A153 vs STR2A153D SMPS IC

Here is the data sheet

https://datasheetspdf.com/mobile/938...ken/STR2A153/1
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Old 01-20-2022, 04:22 PM   #3
dkneyle
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Default Re: STR2A153 vs STR2A153D SMPS IC

Yes, thanks, I had the datasheet. But it makes no mention of a 'D' variant, hence why I was asking around if anyone had any experience with this SMPS IC?

In the repair I'm doing it is used in a Pioneer Receiver VSX-529. The IC is rated at about 35W output. It directly drives the switching circuit - no external mosfet. I gather it is used in an auxiliary supply which must power the logic circuits etc of the receiver?
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Old 01-20-2022, 05:28 PM   #4
R_J
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Default Re: STR2A153 vs STR2A153D SMPS IC

On other versions the `D' stands for auto restart on OVP, TSD Operation

Last edited by R_J; 01-20-2022 at 05:32 PM..
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Old 01-20-2022, 05:44 PM   #5
dkneyle
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Default Re: STR2A153 vs STR2A153D SMPS IC

Quote:
Originally Posted by R_J View Post
On other versions the `D' stands for auto restart on OVP, TSD Operation
Hi RJ,

You might need to spell out those acronyms for me?

And in terms of a SMPS, what does auto restart actually mean? If mains power was lost, and then came on again, I would have thought any SMPS would start up again. So I'm obviously missing something?
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Old 01-20-2022, 05:52 PM   #6
R_J
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Default Re: STR2A153 vs STR2A153D SMPS IC

I am looking at the STRA3A200 datasheet

− Overvoltage Protection (OVP) : Latched shutdown or
auto-restart
− Thermal Shutdown (TSD) : Latched shutdown or
auto-restart with hysteresis
Attached Files
File Type: pdf str3a200_ds_en.pdf (708.8 KB, 7 views)
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Old 01-20-2022, 06:37 PM   #7
dkneyle
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Default Re: STR2A153 vs STR2A153D SMPS IC

Thanks RJ. I think that does explain it most likely. "Latched Shutdown" is abnormal condition keeping the SMPS switched off; auto-restart where it does exactly that after the condition is removed.
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