TDA8954th amplifier board circuit diagram 2x 210W

Circuit Power amplifier stereo IC TDA7854TH 2x 210W

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.


  • 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

Tda8954Th Schematic

PCB printed circuit board tda8954th circuit diagram

Tda8954Th Amplifier Board Circuit Diagram Pcb Top
Tda8954Th Amplifier Board Circuit Diagram Pcb Bottom
Tda8954Th Amplifier Board Circuit Diagram Pcb Component View Top
Tda8954Th Amplifier Board Circuit Diagram Pcb Component View Bottom
Amplifier Board Circuit Diagram Bottom Silk
Amplifier Board Circuit Diagram Top Silk



BOM to assemble tda8954th amplifier circuit

Last update: 12/01/2022 11:26

Part Value Description Quantity
Resistors 1/4W
R1, R2 220 (221) SMD resistor 0805 5% 2
R3, R4, R18 0 (0) SMD resistor 0805 5% 3
R5, R6, R7, R8, R31, R32 5.6K (562 or 5601) SMD resistor 0805 1% 5
R9, R10, R13, R14 10R (10R0 or 100) SMD resistor 1206 1% 4
R11 30K (303 or 3002) SMD resistor 0805 1% 1
R12 10 (10R0 or 100) SMD resistor 0805 5% (optional) 1
R15, R16 22 ohms 3W resistor 2
R17, R25, R26, R28, R29 10k (103) SMD resistor 0805 5% 5
R27, R30 1k (102) SMD resistor 0805 5% 2
R34 12k (123) SMD resistor 0805 5% 1
C1, C2 100p/50V SMD Ceramic capacitor 0805 NP0 2
C3, C4 470µ/63V Electrolytic capacitor 2
C5 22µF/160V Electrolytic capacitor 1
C6, C7, C8, C9, C16 470n/63 or 100V (474) Polyester Capacitor 5
C10, C11 330p SMD Ceramic capacitor 0805 NP0 2
C12, C13 220n SMD Ceramic capacitor 0805 X7R 2
C14, C25, C26, C27, C28 220p/100V SMD Ceramic capacitor 0805 NP0 5
C15, C35 100n SMD Ceramic capacitor SMD 0805 2
C17, C18, C19, C20, C21, C22, C31, C32 100nF/100V SMD Ceramic capacitor 1206 X7R 8
C23, C24, C33, C34 15n/100V SMD Ceramic capacitor 0805 X5R 4
C29, C30 680n/63 ou 100V (684) Polyester Capacitor 2
C39 100uF/25V Electrolytic capacitor 1
DZ1 5V6 – Zener 5.6V 500mW SMD LL-34 Zener diode 1
DZ2 7V5 – Zener 7.5V 500mW SMD LL-34 Zener diode 1
D1, D2, D3, D5 US1MG or equivalent Fast Recovery Diode 1kV 1A SMA 4
IC1 TDA8954TH Class D Audio Amplifier Integrated Circuit – NXP Semiconductors 1
Q1 MBT5551 (G1) or equivalent SOT23 NPN -160V SMD transistor 1
Q2, Q3 S9015 (M6) or equivalent SOT23 -50V SMD NPN transistor 2
DC Terminal block 3 pin 5.08 mm DC power supply 1
INL Terminal block 2 pin 5.08 mm Left audio input 1
INR Terminal block 2 pin 5.08 mm Right audio input 1
OUTL Terminal block 2 pin 5.08 mm Left audio output 1
OUTR Terminal block 2 pin 5.08 mm Right audio output 1
L1, L2 22µH Toroidal Coil  10A 2
Welding, Wires, PCB, Box, Power Supply, heatsink, etc.

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



PDF datasheet TDA8954TH

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About the author blog author. Electronics technician for the technical school of Brasilia - Brazil. Interested in electronics, circuits and technology in general.

8 thoughts on “TDA8954th amplifier board circuit diagram 2x 210W”

  1. BJ je suis à la recherche d’un schéma fonctionnel d’Élevateur de tension D.C. 12v à 19v 5A. Au fait utiliser un laptop de 19vsur un système solaire de 12v sans un onduleur de 12/220v

  2. 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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