View lm1875 datasheet:

July 2002 LM1875 20W Audio Power Amplifier General Description Features n Up to 30 watts output power The LM1875 is a monolithic power amplifier offering very low distortion and high quality performance for consumer audio n AVO typically 90 dB applications. n Low distortion: 0.015%, 1 kHz, 20 W ± The LM1875 delivers 20 watts into a 4? or 8? load on 25V n Wide power bandwidth: 70 kHz ± supplies. Using an 8? load and 30V supplies, over 30 n Protection for AC and DC short circuits to ground watts of power may be delivered. The amplifier is designed n Thermal protection with parole circuit to operate with a minimum of external components. Device n High current capability: 4A overload protection consists of both internal current limit and n Wide supply range 16V-60V thermal