TPA3122D2

www.ti.com TPA3122D2 SLOS527A – DECEMBER 2007 – REVISED DECEMBER 2007 15-W STEREO CLASS-D AUDIO POWER AMPLIFIER FEATURES 1 10-W/ch into an 4-Ω Load From a 17-V Supply 15-W/ch into an 8-Ω Load From a 28-V Supply Operates from 10 V to 30 V Efficient Class-D Operation Four Selectable, Fixed Gain Settings Internal Oscillator (No External Components Required) Single Ended Analog Inputs Thermal and Short-Circuit Protection with Auto Recovery Feature 20-pin DIP Package APPLICATIONS Televisions DESCRIPTION The TPA3122D2 is a 15-W (per channel) efficient, Class-D audio power amplifier for driving stereo single ended speakers or mono bridge tied load. The TPA3122D2 can drive stereo speakers as low as 4Ω. The efficiency of the TPA3122D2 eliminates the need for an external heat sink when playing music. The gain of the amplifier is controlled by two gain select pins. The gain selections are 20, 26, 32, and 36 dB. SIMPLIFIED APPLICATION CIRCUIT Left Channel Right Channel 1 mF 1 mF TPA3122D2 0.22 mF LIN BSR 22 mH 470 mF RIN ROUT PGNDR 0.68 mF 1 mF BYPASS AGND PGNDL LOUT BSL 0.68 mF 22 mH 0.22 mF 470 mF 10 V to 30 V AVCC PVCCL PVCCR 10 V to 30 V Shutdown Control Mute Control SD MUTE VCLAMP 1 mF GAIN0 GAIN1 } 4-Step Gain Control 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this da...