The STK4102II series (STK4102II) and STK4101V series (high-grade type) are pin-compatible in the output range of 6W to 50W. Once the PCB pattern is designed, you can easily satisfy the requirements for new sets simply be changing the IC. Small-sized package whose pin assignment is the same as that of the STK4101II series Built-in muting circuit to cut off various kinds of pop noise