This is circuit design of 200W mono / stereo power amplifier using TDA1514A. This circuit support mono and stereo channel. Mono channel uses bridge configuration, so the mono choice will be give power output by twice than stereo choice.

A symetrical power supply (dual polarity) is required to powered this circuit. Power supply voltage (+) 28VDC and (-) 28VDC max.

The components list and assembling procedure of this 200W mono / stereo power amplifier  is provided in circuit manual document. You may download the circuit manual at the end of this post.

Circuit Features:

• Universal, robust and compact are the words to describe this amplifier.
• A stereo or a mono amplifier.
• Three selectable input sensitivities.
• Overload and short-circuit protection.
• Protection against incorrect power supply polarity.
• Thermally protected.
• Speaker transient suppression.

Amplifier Specifications:

• Rms output power: 2 x 50W / 4ohm ; 2 x 40W / 8ohm
• Rms mono-bridged power: 100W / 8ohm
• Total music output: 200W
• Harmonic distortion: 0.01% at 1kHz
• Signal-to-noise ratio: 102dB (A weighted)
• Stereo channel separation: 85dB
• Damping factor (at 100Hz): > 1000
• Input impedance: 22Kohm
• Input sensitivity: 300mV, 550mV or 1V switchable
• Thermal protection: max. 1h
• Short-circuit and overload protection: max. 10 sec.
• Power supply: + 28VDC and – 28VDC max.
• Consumption (2 x 4ohm or mono-bridge 8ohm): 4A max.
• Consumption (2 x 8ohm): 2.5A max.

Downloads:
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The post 200W Mono / Stereo Power Amplifier using TDA1514A appeared first on Amplifier Circuit Design.

Note on the capacitor C8 : there are patterns in which the capacitor is present, the other where it does not appear.

Parts list :
R1 : 620 ohm
C1 : 1 uF
C2 : 10 uF
C3 : 100 nF
C4 : 100 uF
C5, C5' : 100 nF
C6 : 1uF
C7 : 100 nF
C8 : 1 nF
U1 : TDA 2003

The post 40W / 2 ohm (24W / 4 ohms) Bridge Power Amplifier (Cheaper Version) appeared first on Amplifier Circuit Design.

Mounted in bridge amplifier these two circuits can deliver the Honourable power of 40 W with an 2 ohm headphone. Using a 4-ohm headphone will still release a power slightly greater than 20 W. The bandwidth extends from 40 Hz to 15 KHz, and power ratings are valid for a harmonic distortion less than 0.15%.

This bridge power amplifier circuit requires a voltage of 18 V maximum and should not be exceeded. While the system supports a higher voltage (up to 28 V) output, but the symmetry is no longer guaranteed, so it is not possible to get more power with 18 V, without distortion. Note that you can also choose to supply low voltage, 12 V, for example, if you just need a little power and does not require a power of 40 W.

The post 40W / 2 ohm (24W / 4 ohms) bridge power amplifier appeared first on Amplifier Circuit Design.

This 32 ohm Headphones Amplifier circuit built with an IC which consists of four op amps (TL074, TL084 and LM324). This amplifier circuit produces power 30 mW x 2 (1 stereo output for headphones 32 ohms) with a supply voltage + / -4.5 V (two 4.5 V batteries).

For each of the two channels, two op amp are connected in bridge amplifier, to provide headphones a voltage double that which would have been obtained with a single op amp. And in this type of wiring, which said dual voltage power quad also said, for the same load impedance. The same principle adopted by some manufacturers of car radios or amplifiers for high power while making use of reasonable voltages (more bridge circuit).

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