TPA3120D2

www.ti.com TPA3120D2 SLOS507E – MARCH 2007 – REVISED SEPTEMBER 2007 25-W STEREO CLASS-D AUDIO POWER AMPLIFIER 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 APPLICATIONS Televisions DESCRIPTION The TPA3120D2 is a 25-W (per channel) efficient, Class-D audio power amplifier for driving stereo speakers in a single-ended configuration or a mono bridge-tied speaker. The TPA3120D2 can drive stereo speakers as low as 4 Ω. The efficiency of the TPA3120D2 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. SIMPLIFIED APPLICATION CIRCUIT Left Channel Right Channel 1 mF 1 mF 1 mF TPA3120D2 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 Control Mute Control AVCC SD MUTE PVCCL PVCCR VCLAMP 1 mF GAIN0 GAIN1 10 V to 30 V } 4-Step Gain Control 1 Please be awa...