TDA8954th amplifier board circuit diagram 2x 210W, the TDA8954 is a stereo or mono high-efficiency Class D audio power amplifier in a single IC featuring low-power dissipation. It is designed to deliver up to 2 × 210W into a 4 Ω load in a stereo Single-Ended (SE) application. It combines the benefits of Class D efficiency (≈93 % into a 4 Ω load) with audiophile sound quality comparable to that associated with Class AB amplification. The amplifier operates over a wide supply voltage range from ±12.5V to ±42.5V and features low quiescent current consumption. The TDA8954 is supplied with two diagnostic pins for monitoring the status of Thermal Fold Back (TFB), Overcurrent Protection (OCP) and other protection circuits.

Features

• High output power in typical applications: ‹SE 2×210W, RL=4 Ω (VDD=41V; VSS=−41V) ‹SE
• Symmetrical operating supply voltage range from ±12.5V to ±42.5V„
• Stereo full differential inputs, can be used as stereo SE or mono BTL amplifier Low noise
• Smooth pop noise-free start-up and switch off„2-pin diagnostics for protection circuits
• Fixed frequency internal or external clock
• High efficiency ≈ 93%„ Zero dead time switching Low quiescent current Advanced protection strategy: voltage protection and output current limiting
• Thermal FoldBack (TFB) with disable functionality „Fixed gain of 30dB in SE and 36dB in BTL applications
• fully short-circuit proof across load BD modulation in BTL configuration Clock protection

he TDA8954 is a two-channel audio power amplifier that uses Class D technology. For each channel, the audio input signal is converted into a digital Pulse Width Modulation (PWM) signal using an analog input stage and a PWM modulator. To drive the output power transistors, the digital PWM signal is fed to a control and handshake block and to high- and low-side driver circuits. This level-shifts the low-power digital PWM signal from a logic level to a high-power PWM signal, switching between the main supply lines. A second-order low-pass filter converts the PWM signal to an analog audio signal that can be used to drive a loudspeaker.

The cricuit has been updated by adding TFB function to the mode pin. It also added LEDs to check for over temperature faults and alarm deal operation.

Schematic TDa7854 power amplifier circuit diagram

PCB printed circuit board tda8954th circuit diagram

BOM to assemble tda8954th amplifier circuit

Last update: 12/01/2022 11:26

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PDF datasheet TDA8954TH