Diall IP54 AE0295 LED Rechartgeable lamp

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I've been given a Diall IP54 AE0295 LED Rechargeable lamp the only thing not working is there is no 'charge voltage' from the buck regulator on the LED control board.

The charger delivers 24VC DC and the LED indicators and LED lamp works. The circuit board is marked AE0195-BAT. The buck regulator uses a 8 pin SMD chip and there's is nothing coming out of it.

The only thing I can make of the marking is either XL40 or X140, by chance does anyone have any clue what chip it is..... must put out around 7.4V or so because this is the Lithium battery voltage.

Thanks, Dave

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Re: Diall IP54 AE0295 LED Rechartgeable lamp

Eureka....
The buck regulator chip is a XLSemi 'XL4201' is the type number, here's the data sheet-:


Answered my own question.... might be useful to someone out there.

Dave