Junsi iCharger 458Duo repair

[EgOPhil]

Hello everyone,

the IC labeled “D4W28” gets hot after a few seconds and the iCharger stays off. I have measured the components around the ICs “AL114” and “D4W28” and they are all OK.
However, I have the problem that I can't find the ICs and therefore have no datasheet. Do any of you have the datasheet to hand? Also, do you know where I can buy these ICs?


Thank you in advance,

Phil

[m1ch43lzm]

Hi, i only found info on the AL*** IC, it's either FP6291 or SD6271, likely clones of each other, its a step-up DC-DC boost converter in SOT23-6 package
As for the D4W28, couldn't find anything that looks like it by searching for D4 or D4W