Car Amplifiers » Car Amp circuits

Car Stereo Booster with LM2896

amplifier — Sun, 30 Aug 2009 16:34:14 +0000

This car stereo booster uses an LM2896 IC which has two integrated amplifiers. It can be powered with voltages up to 15 volts. The power output is 2.5 watts per channel with an 8 Ω load and supply voltage of 12 volts. Using the bridge tehnique in the circuit gives a power output of 9 watts. The car audio booster can be powered up from 3 up to 15 volts.

The load impedance that can be connected at its output can be either 4 Ω or 8 Ω. The supply voltage and the load impedance influence the output power level. This amplifier circuit is designed as a booster for auto radio/cassette players. The current consumption by maximum power output and a 4 Ω load is 1 ampere.

Car stereo booster circuit diagram

Car audio booster PCB layout

Car booster in bridge connection

To wire the booster as a bridged amplifier, follow the instructions:

Short the input number 2 of the amplifier. This is the input that is connected to the capacitor C14.
Add the additional capacitor Cx and the resistor Rx to the circuit as shown by the dashed lines in the schematic diagram. These parts were considered during the design phase of the printed circuit and appropriate holes, and soldering points are already available on the circuit board.
Instead of using 2 speakers, use a single speaker. Connect the speaker to both output lines of the amplifier as shown by the dashed lines in the booster schematic diagram. You can use either 4 Ω or 8 Ω speaker.
Now, since only a single speaker is connected to the amplifier circuit, you must construct a second amplifier circuit identical to this one if you want a stereo system. The second circuit will work for the second channel.

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TDA 2005 amplifier

amplifier — Sun, 22 Mar 2009 14:27:42 +0000

TDA2005 is a 20W is a bridge amplifier for car radio. The TDA 2005 is classB dual audio power amplifier in MULTIWATT) package specifically designed for car radio application : power booster amplifiers are easily designed using this device that provides a high current capability (up to 3.5 A) and that can drive very low impedance loads (down to 1.6W).

TDA2005M/S pin connections

TDA 2005 maximum ratings

Operating Supply Voltage 18 V

DC Supply Voltage 28 V

Peak Supply Voltage (for 50 ms) 40 V

Output Peak Current (non repetitive t = 0.1 ms) 4.5 A

Output Peak Current (repetitive f . 10 Hz) 3.5 A

Power Dissipation at Tcase = 60 °C 30 W

Storage and Junction Temperature – 40 to 150 °C

TDA2005M is designed for bridge applications and TDA2005S for stereo application.
With TDA 2005S you can build a 2 x 10Watt stereo amplifier circuit on 2 x 2Ω speakers with 10% distorsions.

TDA2005 bridge amplifier schematic

This 20W bridge amplifier is build with TDA2005M.

TDA 2005 stereo amp schematic

A 2 x 10W stereo amplifier circuit schematic build with TDA2005S.

This 2 amplifiers circuits built with TDA2005 circuits have not been tested.

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4 x 50 Watts TDA7560 car amp

amplifier — Thu, 29 Jan 2009 12:20:36 +0000

TDA7560 is a 4 x 45W QUAD BRIDGE CAR RADIO AMPLIFIER PLUS HSD.
The TDA7560’s inputs are ground-compatible and can stand very high input signals (± 8Vpk) without any performances degradation. If the standard value for the input capacitors (0.1mF) is adopted, the low frequency cut-off will amount to 16 Hz.

The TDA7560 is a breakthrough BCD (Bipolar / CMOS / DMOS) technology class AB Audio Power Amplifierin Flexiwatt 25 package designed for high power car radio. The fully complementary P-Channel/N-Channel output structure allows a rail to rail output voltage swing which, combined with high output current and minimised saturation losses sets new power references in the car-radio field, with unparalleled distortion performances.

SUPERIOR OUTPUT POWER CAPABILITY:
4 x 50W/4W MAX.
4 x 45W/4W EIAJ
4 x 30W/4W @ 14.4V, 1KHz, 10%
4 x 80W/2W MAX.
4 x 77W/2W EIAJ
4 x 55W/2W @ 14.4V, 1KHz, 10%
EXCELLENT 2W DRIVING CAPABILITY
HI-FI CLASS DISTORTION
LOW OUTPUT NOISE

4 x 50 Watts TDA7560 car amp circuit

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