View la4261 datasheet:

Ordering number: EN1321E Monolithic Linear IC LA4261 3.5 W 2-Channel AF Power Amplifier for Home Stereos and Music Centers Features Package Dimensions . 3018A-SIP10F Minimum number of external parts required (No input capacitor, bootstrap capacitor required). unit : mm . High output: 3.5 W typ. ?2. . Soft clip, causing little harmonic disturbance to radios [LA4261] (See page 8). . Small pop noise at the time of power switch ON/OFF (See page 8). . Built-in protector against abnormal modes (Thermal shutdown, overvoltage). SANYO : SIP10F Specifications Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Maximum supply voltage VCCmax 25 V Maximum output current IOP 1 channel 2.0 A With heat sink Allowable power dissipation Pd max 7.5 W (see Pd – T