Help identify this integrated circuit

[u/milun_]

The battery is fine and fully charged at 4.2 V (red wires: L+ and B-). The LED is at the top (B+ and the blue wire). At the bottom, there is a switch with four modes: the first press turns the LED on at full brightness, the second switches to half brightness, the third activates blinking mode, and the fourth turns the LED off.

To the right of the switch, there are blue and green LEDs that indicate charging status, a full battery, or when the lamp is in use.

It's not visible in the picture, but there is some blue stuff underneath the IC, possibly copper oxidation or some kind of glue. Anyway, the lamp doesn't respond when I press the switch, so I believe the IC was damaged by the rain.

It's a cheap battery powered lamp, but I have some tools and would like to try replacing the IC. The problem is that there are no markings on it, and since I'm not an electronics expert, I can't identify it.

Does anyone recognize this IC?

[u/SouthPark_Piano]

Most likely tc4056a

 

[u/milun_ → u/SouthPark_Piano]

I've just unsoldered IC and there was brocken connection from pin 7 to the switch, possible due to corrosion (blue stuff). I made a jumper, and it works now, so the IC is fine, no need to change it.

[u/Javitiiin → u/SouthPark_Piano]

No lo creo. Tiene los pines 2, 3, 5 y 7 libres sin usar y el IC TC4056A tiene la masa en el pin 3. Has comprobado el transistor npn J3Y? También tienes que mirar las 2 resistencias de 1k y 100 oh. Por cierto en la pista del conector del transistor (la de arriba) sale como apagada.