Circuit Power amplifier stereo IC TDA7854TH 2x 210W
Circuit Power amplifier stereo IC TDA7854TH 2x 210W

Circuit Power amplifier stereo IC TDA7854TH 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 4Ω 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), Over Current Protection (OCP) and other protection circuits.


  • 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.

Schematic TDa7854 power amplifier circuit

Schematic TDa7854 power amplifier circuit
Schematic TDa7854 power amplifier circuit


Circuit Power amplifier stereo IC TDA7854TH 2x 210W
Circuit Power amplifier stereo IC TDA7854TH 2x 210W
PCB Bottom


Part list

C1, C2100pCeramic capacitor SMD 08052
C3, C4470µ/63VElectrolytic capacitor2
C522µF/160VElectrolytic capacitor1
C6, C7, C8, C9, C12470n/35VPolyester Capacitor5
C10, C11330pCeramic capacitor SMD 08052
C13, C16220nCeramic capacitor SMD 08052
C1447pCeramic capacitor SMD 08051
C15, C21, C22  C31, C32100nCeramic capacitor SMD 08059
C17, C18, C19, C20,100nCeramic capacitor SMD 12069
C23, C24, C33, C3415nCeramic capacitor SMD 08054
C25, C26, C27, C28220pCeramic capacitor SMD 08054
C29, C30680n/100VPolyester Capacitor2
D15V1Zener Diode 5v1 SMD1
IC1TDA8954THNXP integrated circuit1
DCTerminal block 3 pinsPower supply1
IN2.54mm connectoraudio input1
OURTerminal block 2 pinsRight channel output1
OUTRLTerminal block 2 pinsLeft channel output1
L1, L210µHToroidal Coil  10A2
R1, R2, R3, R4220 (221)Resistor SMD 08054
R5, R6, R7, R85.6K (562)Resistor SMD 08054
R9, R10, R13, R1410R (100)Resistor SMD 12064
R1130K (303)Resistor SMD 08051
R1227K (273)Resistor SMD 08051
R15, R1622 (Red, Red, Black, Gold)Resistor 5W2
Welding, Wires, PCB, Box, Power Supply


Download the files in PDF and Gerber to make the printed circuit board

Download Mirror

Datasheet do TDA8954


  1. This is great Toni. By the way, do you have an audio amplifier that you recommend for subwoofer for cars? Stereo with 12V supply (car Battery) and can do 500w double voice coil subs.


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