TPA3007D1 Mono Medium Power Filter-Free Class-D Audio Amplifier

The TPA3112D1 is a 25-W efficient Class-D audio power amplifier designed for driving a bridge-tied speaker. It incorporates advanced EMI suppression technology, allowing the use of cost-effective ferrite bead filters at the outputs while complying with EMC requirements. The SpeakerGuard protection system features an adjustable power limiter and a DC detection circuit. The adjustable power limiter enables the user to set a "virtual" voltage rail that is lower than the chip supply, thereby limiting the current flowing through the speaker. The DC detection circuit monitors the frequency and amplitude of the PWM signal, shutting off the output stage if input capacitors are damaged or if shorts are detected at the inputs. The TPA3112D1 can drive a mono speaker with an impedance as low as 4 ohms. With a high efficiency exceeding 90%, the TPA3112D1 eliminates the need for an external heat sink during music playback. The outputs are fully protected against shorts to ground, VCC, and between outputs. The short-circuit protection and thermal protection features include an auto-recovery mechanism. This device is manufactured by Texas Instruments.

The TPA3112D1 is a highly integrated Class-D audio amplifier that provides significant advantages in terms of efficiency and protection features, making it suitable for various audio applications. The device operates with a supply voltage range of 8 to 26 V, which allows for flexibility in system design. With a total harmonic distortion plus noise (THD+N) rating typically below 0.1% at rated power, it delivers high-quality audio output.

The advanced EMI suppression technology implemented in the TPA3112D1 is crucial for maintaining signal integrity and minimizing electromagnetic interference, which can affect audio performance. The use of ferrite bead filters at the outputs not only simplifies the design but also reduces the overall component count and cost.

The SpeakerGuard system enhances the reliability of the amplifier by incorporating an adjustable power limiter. This feature allows for the customization of the output power, protecting the speaker from potential damage due to excessive current. The DC detection circuit is an essential safety feature that continuously monitors the amplifier's output for any DC offset, which could indicate a fault condition. In the event of such a fault, the circuit automatically disables the output stage, thereby preventing damage to the connected speaker.

The TPA3112D1 is designed to drive speakers with a minimum impedance of 4 ohms, making it suitable for a wide range of applications, including portable audio systems, televisions, and home theater setups. Its efficiency, exceeding 90%, means that it generates less heat compared to traditional linear amplifiers, allowing for compact designs without the need for bulky heat sinks.

The protection mechanisms against shorts to ground, VCC, and between outputs ensure that the amplifier can withstand various fault conditions, enhancing system robustness. The auto-recovery feature for short-circuit and thermal protection allows the amplifier to resume normal operation once the fault condition is cleared, further increasing reliability.

Overall, the TPA3112D1 is a versatile and efficient audio amplifier solution, ideal for applications requiring high performance and protection in a compact form factor.The TPA3112D1 is a 25-W efficient, Class-D Audio power Amplifier for driving a bridge tied speaker. Advanced EMI Suppression Technology enables the use of inexpensive ferrite bead Filters at the outputs while meeting EMC requirements. SpeakerGuard speaker protection system includes an adjustable power limiter and a DC detection circuit.

The adj ustable 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 TPA3112D1 CAN drive a mono speaker as low as 4. The high efficiency of the TPA3112D1 > 90%, eliminates the need for an external heat sink when playing music. The outputs are fully protected against shorts to GND, VCC, and output-to-output. The short-circuit protection and thermal protection includes an auto-recovery feature. By Texas Instruments 🔗 External reference