Hello,
Not sure if this is the right place to post this. Joined this forum in the hopes someone might know something about the ICs on this bulb and whether or not they're responsible for the LEDs not getting power. I know it's probably not worth fixing the bulb, but I'm mostly interested in doing this for fun/as a learning experience. I like to try and fix things whenever possible.
I have a LUMIMAN smart bulb that is not lighting up. It's still detected in the app and you can also re-pair, but the LEDs just won't light. When probing the LEDs in diode mode, they light up - I guess this means they are good? I've also checked the caps, diodes and resistors. Nothing looks off. I suspect there might be a problem with one or both of the ICs on the board. One of the ICs is a BP2525 and the other is a YT5202A. I can't find much information about the YT5202A. Since the bulb is still detected by the app, some power must be getting through in order to power the Bluetooth module (WB2L), but I'm not quite sure which IC would be responsible for sending power to the module.
I'm guessing one IC is for the module and another is for the LEDs, so the IC that isn't responsible for powering the module is likely the culprit, although not sure about this.
I've attached a photo of where the YT5202A IC is on the board:
Some limited googling does suggest that the YT5202A may be some LED-driven constant current IC, but not really sure since information is limited and there's no datasheet I can find. I can find one listing on Aliexpress, but again there's limited info on the listing and no reviews. So I'm not sure if the IC is correct or if it even works properly.
Is there perhaps an alternative of this IC or maybe someone knows what this IC actually does and whether or not it'll be responsible for the LEDs no longer being able to light up?
Appreciate any response. I could just order both the BP2525 and YT5202A ICs on Aliexpress and test, but I'd rather know for sure to save myself wasting money on ICs I don't need and time (waiting for them to arrive, means I can't work on it until they arrive).
Not sure if this is the right place to post this. Joined this forum in the hopes someone might know something about the ICs on this bulb and whether or not they're responsible for the LEDs not getting power. I know it's probably not worth fixing the bulb, but I'm mostly interested in doing this for fun/as a learning experience. I like to try and fix things whenever possible.
I have a LUMIMAN smart bulb that is not lighting up. It's still detected in the app and you can also re-pair, but the LEDs just won't light. When probing the LEDs in diode mode, they light up - I guess this means they are good? I've also checked the caps, diodes and resistors. Nothing looks off. I suspect there might be a problem with one or both of the ICs on the board. One of the ICs is a BP2525 and the other is a YT5202A. I can't find much information about the YT5202A. Since the bulb is still detected by the app, some power must be getting through in order to power the Bluetooth module (WB2L), but I'm not quite sure which IC would be responsible for sending power to the module.
I'm guessing one IC is for the module and another is for the LEDs, so the IC that isn't responsible for powering the module is likely the culprit, although not sure about this.
I've attached a photo of where the YT5202A IC is on the board:
Some limited googling does suggest that the YT5202A may be some LED-driven constant current IC, but not really sure since information is limited and there's no datasheet I can find. I can find one listing on Aliexpress, but again there's limited info on the listing and no reviews. So I'm not sure if the IC is correct or if it even works properly.
Is there perhaps an alternative of this IC or maybe someone knows what this IC actually does and whether or not it'll be responsible for the LEDs no longer being able to light up?
Appreciate any response. I could just order both the BP2525 and YT5202A ICs on Aliexpress and test, but I'd rather know for sure to save myself wasting money on ICs I don't need and time (waiting for them to arrive, means I can't work on it until they arrive).
