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1 vote

Problem with LED lamp PCB

Sometimes we don't have enough information to solve your problem. The next best thing, then, would be how to get more information. So, my thoughts, in order, are... Find a way to stop destroying the ...
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2 votes

What is the type of this smd part?

From the package and the layout, it looks like a transistor. Track width hints at high current, so it's most likely a MOSFET. G3 is the gate resistor, R5 the pulldown resistor. The drain goes to a 3-...
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1 vote

What is the type of this smd part?

That is a SOT-23-3 package, commonly used for transistors (BJT, MOSFET, etc.), voltage regulators, diodes, diode arrays, etc. The designator Q2 would suggest it is ...
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2 votes
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How to infer resistor size from the manual of this microcontroller board?

The CAD files that @TimWescott referenced contain the PCB layout (in the schematic zip, not necessarily where you would expect it). As typical for ST, they are in Altium. The footprints look like this:...
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2 votes

How to infer resistor size from the manual of this microcontroller board?

A solder bridge is either a blob of solder across two specially shaped pads, or a 0-ohm resistor, also called a jumper. That's it! The name of the thing itself tells you what to use to short it: ...
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0 votes

What LED PWM controller has marking AT508CS?

Perhaps this is a one-time programmable microcontroller pic12c508
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3 votes

Need help identifying SMD IC

Function and pinout matches TPS560430Y, but there may be others with this pinout. The inductor 2.2 µH is a bit small for this circuit, but OK if used with <= 12 V input.
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  • 1,954
0 votes
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Identifying SMD diode

Got it working finally with ST Zener Diodes ZMM5V1 5.1V 500mW Hints from Kartman and Tim Williams helped . thank you
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  • 101
0 votes

SMD capacitor damaged - use of X2 class

As correctly noted, surge voltages are limited, so this is an unlikely failure mode. It IS still over ratings, as others have noted. In particular, look at the peak voltage drop of the TVS diode. It ...
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0 votes

SMD capacitor damaged - use of X2 class

Depends on Surge and Burst requirements you have to use a cap which will absorve the high voltage, for conducted emission no much problem, you could use any type for testing, works well. But if you ...
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2 votes

Identifying SMD diode

Try tracing the circuit (follow traces and vias between components; remove components and check continuity if necessary). I would guess the circled diode is a zener, in MELF package. The left-hand ...
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4 votes
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What type of SMD diodes are these?

I'd say those are 4 RD7.5S, Zener diodes made by Renesas: https://www.renesas.com/us/en/general-parts/rd75s-diodes-constant-voltage My Google search term: "RD7.5S" You're quite lucky, that ...
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  • 16.4k
0 votes

What is an MLX12106J?

It is a sensor protection IC made by Melexis and the part is currently available. Try this link for the data sheet https://www.alldatasheet.com/view_datasheet.jsp?Searchword=MLX12106. The search term ...
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