TPA3110D2 TSSOP-28 original

original

TPA3110D2 TSSOP-28

Part        TPA3110D2

Category              Audio - Audio amplifiers - Speaker amps

Title       15-W stereo, 30-W mono, 8- to 26-V supply, analog input Class-D audio amplifier w/ SpeakerGuard?lt;/p>

Description        

The TPA3110D2 is a 15-W (per channel) efficient, Class-D audio power amplifier for driving bridged-tied stereo speakers. Advanced EMI Suppression Technology enables the use of inexpensive ferrite bead filters at the outputs while meeting EMC requirements. SpeakerGuard™ speaker protection circuitry includes an adjustable power limiter and a DC detection circuit. The adjustable power limiter allows the user to set a "virtual" voltage rail lower than the chip supply to limit the amount of current through the speaker. The DC detect circuit measures the frequency and amplitude of the PWM signal and shuts off the output stage if the input capacitors are damaged or shorts exist on the inputs.

The TPA3110D2 can drive stereo speakers as low as 4 ?. The high efficiency of the TPA3110D2, 90%, eliminates the need for an external heat sink when playing music.

A Class D audio amplifier is basically a switching amplifier or PWM amplifier. There are a number of different classes of amplifiers. This class of amplifiers is a switching or PWM amplifier as mentioned above. This class of amplifiers is the main focus of this application note. In this type of amplifier, the switches are either fully on or fully off, significantly reducing the power losses in the output devices. Efficiencies of 90-95% are possible. The audio signal is used to modulate a PWM carrier signal which drives the output devices, with the last stage being a low pass filter to remove the high-frequency PWM carrier frequency.