This part is a kind of semiconductor called MIP2K4.

Function of this product has (MIP2Kx) High-Performance IPD.

Manufacturers : Panasonic

Image and pinout :

Some of the text within the PDF file :

Featuring built-in frequency jitter necessary for EMI, while also conserving power during standby! High-Performance IPD with Frequency Jitter for Small Charger/Adapter: MIP2Kx Series „ Overview MIP2Kx series is a high-performance IPD designed for 15W battery chargers and featuring built-in frequency jitter function at PWM control. It features built-in protection circuits necessary for compact power source charger circuitry. This allows a significant reduction in externally connected parts. It provides PWM control when a normal load is applied and intermittent control with low load. This results in greater efficiency for very low to maximum loads, while also conserving power during standby. Unit : mm Pin No. Pin Name 1 VDD 2 FB 3 4 5 6 7 8 CL VCC Drain ⎯ Source Source „ Feature • [ ... ]

MIP2K4 PDF Datasheet Download