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.
Follow us on social media
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
| 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 |
| Capacitors | |||
| 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 |
| Semiconductors | |||
| 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 |
| LED1 | TEMP | LED3MM | 1 |
| LED2 | ALARM | LED3MM | 1 |
| Q1 | MBT5551 (G1) or equivalent | SOT23 NPN -160V SMD transistor | 1 |
| Q2, Q3 | S9015 (M6) or equivalent | SOT23 -50V SMD NPN transistor | 2 |
| Connectors | |||
| 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 |
| Miscellaneous | |||
| 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
Hello! how to Btl this amplifier?
Hello binnzx, See this
https://xtronic.org/circuit/tda8954-power-class-d-amplifier-board-420w/
How can you unmute tda8954amplifier
Hi Sam
Pin mode (6), >= 3V.
BJ tony.moi 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
Hi there , TDA7854 power supply is +40v Ov -40v 4amper , best regards
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.
Hello Anson
This missing the power supply!