TPA3123D2

www.ti.com TPA3123D2 SLOS541C – JULY 2007 – REVISED AUGUST 2010 25-W STEREO CLASS-D AUDIO POWER AMPLIFIER Check for Samples: TPA3123D2 FEATURES 1 2 25-W/ch into a 4-Ω Load from a 27-V Supply 20-W/ch into a 4-Ω Load from a 24-V Supply Operates from 10 V to 30 V Efficient Class-D Operation Eliminates Need for Heat Sinks Four Selectable, Fixed-Gain Settings Internal Oscillator (No External Components Required) Single-Ended Analog Inputs Thermal and Short-Circuit Protection With Auto Recovery Space-Saving Surface-Mount 24-Pin TSSOP Package TPA3120D2 Pin-to-Pin compatible with TPA3120D2 Advanced Power-Off Pop Reduction APPLICATIONS Televisions DESCRIPTION The TPA3123D2 is a 25-W (per channel) efficient, Class-D audio power amplifier for driving stereo speakers in a single-ended configuration or a mono speaker in a bridge-tied-load configuration. The TPA3123D2 can drive stereo speakers as low as 4 Ω. The efficiency of the TPA3123D2 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, 36 dB. The patented start-up and shut-down sequences minimize pop noise in the speakers without additional circuitry. Left Channel Right Channel SIMPLIFIED APPLICATION CIRCUIT 1 mF 1 mF 1 mF TPA3123D2 0.22 mF LIN BSR 22 mH 470 mF RIN ROUT PGNDR 0.68 mF PGNDL 0.68 mF BYPASS AGND LOUT BSL 22 mH 0.22 mF 470 mF 10 V to 30 V Shutdown Contr...