4W8N

[KevinW]

Anyone know what this device is ?
It's marked 4W8N but I can't find it anywhere.

 

[Lightium]

maybe a voltage regulator? what circuit is it?

 

[KevinW]

It's the control section of a 20 volt brushless motor board.

 

[Lightium]

Unfortunately, a good source for reference and replacement parts is no-more, so it will be hard to know what you have and get a replacement. Unless one of the older members chimes-in with more experience to help you it will be hard to find what you have.

 

[KevinW]

This is a fairly new unit, maybe three years.

 

[rjenkinsgb]

Possibly Ricoh R1210N341C PWM regulator?? That's a "4W" in a five lead package.

R1210N341C Download

Download R1210N341C Datasheet. File Size: 28.93 Kbytes. Part #: R1210N341C. Description: POWER MANAGEMENT ICs MARK INFORMATIONS R1210N SERIES MARK SPECIFICATION. Manufacturer: RICOH electronics devices division.

www.alldatasheet.com

https://www.nisshinbo-microdevices.co.jp/en/pdf/datasheet/r1210nxx1-ea.pdf

That part number would be a 3.4V regulator, but it could possibly be used with a different feedback circuit as a PWM driver??

(Only the first part of some surface mount markings is the actual device ID, the rest is a batch, date or factory code).

 

[KevinW]

Ok, thank you.
I'll look at that.

update
I have 20 volt in and nothing out so I think it is a voltage regulator.

 

[Lightium]

A photo of the other side of the board and the pin designation of the header it's traced to might be helpful.