Showing posts with label x. Show all posts
Showing posts with label x. Show all posts
Wednesday, October 15, 2014
4 X 15 Watt Mini Power Amplifier
A lot of electronic circuits in the domain of audio amplifiers are already been published here. This circuit is a little different because it is a four channel amplifier. Each channel of this amplifier can deliver an output of 15Watts into a 4 ohm speaker. The amplifier can be operated from a single 12V DC supply and this makes it possible to use this amplifier in car audio applications too.
Circuit diagram :
4 X 15 Watt Mini Power Amplifier
The circuit is based on the 15W BTL X 2 channel audio power amplifier IC TA8215 from Toshiba. Even though chip is specifically designed for car audio applications it can be also used for home audio applications. Two TA8215 ICs are used here in order to obtain a 4 channel amplifier system. The circuit is designed almost exactly as per the application diagram in the ICs datasheet. Pins 7 and 19 are the Vcc pins of the ICs internal integrated power amplifier stages and these pins are connected to the positive supply. Pin 9 is the Vcc pin for ICs internal preamplifier and it is also connected to the positive supply. Pins 13 and 14 are the internal power amplifiers ground pins and they are tied together and connected to the ground.
The internal preamplifier’s ground pin (pin5) is connected to the common ground through a 10 Ohm resistor which makes the input ground separated from the common ground by a resistance of 10 ohms and this improves the noise rejection. The 100uF capacitor works as a power supply de-coupler. The resistor networks connected to the output lines of each amplifier improves the high frequency stability. The variable resistors (R3, R4, R12 and R13) works as the volume controller for the corresponding channels.
Notes :
- Assembling the circuit on a good quality PCB is a must for obtaining optimum sound quality.
- Use 12V DC for powering the circuit.
- The ICs must be fitted with adequately sized heat sinks.
- R3, R4, R12 and R13 serves as volume controllers.
- K1 to K4 can be 4 Ohm, 20W speakers.
- This amplifier circuit can be used in a variety of applications such as car audio systems, home theater systems, personal audio systems, public address systems etc.
Thursday, September 18, 2014
4 x 45 W power amplifier
General description
The TDA8593J is a complementary quad BTL audio power amplifier made in BCDMOS technology. It contains four independent amplifiers in Bridge Tied Load (BTL) configuration. Through the I2C-bus, the diagnostic information of each amplifier and speaker can be read separately. Both front and both rear channel amplifiers can be configured independently in line driver mode with a gain of 20 dB.
Features
- I2C-bus control
- Hardware programmable I2C-bus address
- Can drive a 2 Ω load with a battery voltage of up to 16 V and a 4 Ω load with a battery voltage of up to 18 V
- DC-load detection: open, short and present
- AC-load (tweeter) detection
- Programmable clip detection: 1 % or 3 %
- Programmable thermal protection pre-warning
- Independent short-circuit protection per channel
- Low gain line driver mode (20 dB)
- Loss-of-ground and open VP safe
- All outputs protected from short-circuit to ground, to VP, or across the load
- All pins protected from short-circuit to ground
- Soft thermal clipping to prevent audio holes
- Low battery detection.
Circuit Diagram
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| Circuit diagram for TDA8593 |
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| PCB layout of test and application circuit; components bottom |
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| PCB layout of test and application circuit; copper layer bottom |
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| PCB layout of test and application circuit; components top |
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| PCB layout of test and application circuit; copper layer top |
Saturday, September 6, 2014
Car Amplifier Circuit 2 x 30 W stereo
This circuit use the IC AN7166 . On circuit have an advantage is very loud sound , although only 30W this circuit is like a 100 W transistor power amplifier. Its so good circuit with IC AN7166 . This circuit require minimum voltage 12 V and Maximum voltage 24 volt , I recomended voltage for this circuit is 18 volt. And use the battery supply current 5 Ampere. Maximum power output of one speaker 30 W with impedance 4 Ohm.
See this circuit schematic below :
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| Click image to view large |
Capacitor thats connect legs IC 4 and 3 is 1 nF . And capacitor thats connect legs IC 9 and 3 is 1 nF. For the input capacitor at 1 uF ( L and R ) for output capacitor at 1000uF with voltage 50 V or higher.
Monday, August 25, 2014
4 x 30W QUAD BRIDGE CAR RADIO AMPLIFIER
Description
The TDA7383 is a new technology class AB Audio Power Amplifier in Flexiwatt 25 package designed for high end car radio applications.
Circuit Diagram
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| 4 x 30W QUAD BRIDGE CAR RADIO AMPLIFIER |
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