The TDA7851L is a breakthrough MOSFET technology class AB frequency power amplifier. Flexible Watt-25 package radio designed for high-power cars. The fully complementary P-channel\/N-channel output structure allows for a return output voltage swing. The combination of high output current and minimum saturation loss sets a new power benchmark in the field of irnb car radio, multi-power BCD technology, with a high output power of 4*45W\/42 Max. Low output noise standby function, mute function, automatic detection in the minimum supply voltage detection.