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.

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.

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Schematic TDa7854 power amplifier circuit

PCB

 

Part list

Parts	Value	description	Amount
Capacitors
C1, C2	100p	Ceramic capacitor SMD 0805	2
C3, C4	470µ/63V	Electrolytic capacitor	2
C5	22µF/160V	Electrolytic capacitor	1
C6, C7, C8, C9, C12	470n/35V	Polyester Capacitor	5
C10, C11	330p	Ceramic capacitor SMD 0805	2
C13, C16	220n	Ceramic capacitor SMD 0805	2
C14	47p	Ceramic capacitor SMD 0805	1
C15, C21, C22  C31, C32	100n	Ceramic capacitor SMD 0805	9
C17, C18, C19, C20,	100n	Ceramic capacitor SMD 1206	9
C23, C24, C33, C34	15n	Ceramic capacitor SMD 0805	4
C25, C26, C27, C28	220p	Ceramic capacitor SMD 0805	4
C29, C30	680n/100V	Polyester Capacitor	2
Semiconductors
D1	5V1	Zener Diode 5v1 SMD	1
IC1	TDA8954TH	NXP integrated circuit	1
Others
DC	Terminal block 3 pins	Power supply	1
IN	2.54mm connector	audio input	1
OUR	Terminal block 2 pins	Right channel output	1
OUTRL	Terminal block 2 pins	Left channel output	1
L1, L2	10µH	Toroidal Coil  10A	2
Resistors
R1, R2, R3, R4	220 (221)	Resistor SMD 0805	4
R5, R6, R7, R8	5.6K (562)	Resistor SMD 0805	4
R9, R10, R13, R14	10R (100)	Resistor SMD 1206	4
R11	30K (303)	Resistor SMD 0805	1
R12	27K (273)	Resistor SMD 0805	1
R15, R16	22 (Red, Red, Black, Gold)	Resistor 5W	2
Welding, Wires, PCB, Box, Power Supply

 

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

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Datasheet do TDA8954

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