Sunday, September 30, 2012
20W Car Audio Amplifier with LM1875
This is just addition 20W audio amplifier circuit , but this time based on the LM1875 audio amplifier IC from National Semiconductors. With a 25V bifold ability accumulation LM1875 can bear 20W of audio ability into a 4 ohm speaker. The LM1875 requires actual beneath external components and has actual low distortion.The IC is aswell arranged with a lot acceptable appearance like fast bulk rate, advanced accumulation voltage range, top achievement current, top achievement voltage swing, thermal aegis etc. The IC is accessible in TO-220 artificial ability amalgamation and is able-bodied acceptable for a array of applications like audio systems, servo amplifiers, home theatre systems etc.
Notes.
- Assemble the circuit on a good quality PCB.
- Use +/-25V DC dual supply for powering the circuit.
- K1 can be 4 ohm, 20W speaker.
- A proper heat sink is necessary for the IC.
- F1 and F2 are 2A
Tuesday, August 9, 2011
Car audio amplifier using TDA2003 IC
Resistors R2 and R3 forms a feedback network that sets the amplifiers gain. C7 input DC de-coupling capacitor and C5 couples the speaker to the amplifiers output. C4 } for improving the ripple rejection C1 and C2 are employed for power filtering. C3 and R1 are used for setting the frequency cut-off. Network comprising of C6 and R4 for frequency stabilization and oscillation.
Notes.
- Assemble the circuit on a good quality PCB.
- Heat sinks are necessary for both ICs.
- The circuit can be operated from 12V DC.
- S1 is the ON/OFF switch.
Monday, June 14, 2010
Car Stereo Audio Amplifier with TDA1553CQ Circuit Diagram
This is a stereo audio amplifier for your car. The ambit is powered by a distinct IC TDA1553 with some alien components, this IC will handle your stereo car audio system.
The TDA1553CQ is a caked chip class-B achievement amplifier in a 13-lead artificial DIL-bent-SIL ability package. It contains 2×22 W amplifiers in BTL configuration. The accessory is primarily developed for car radio applications.
Special features of the device are:
3-state mode switch
· standby: low supply current (<100>
Loudspeaker protection
When a short-circuit to ground occurs, which forces a DC voltage across the loudspeaker of >= V, a built-in protection circuit becomes active and limits the DC voltage across the loudspeaker to <= V. Pin 12 detects the status of the protection circuit (e.g. for diagnostic purposes).
Short-circuit protection
If any output is short-circuited to ground during the standby mode, it becomes impossible to switch the circuit to the mute or operating condition. In this event the supply current will be limited to a few milliamps.
Saturday, May 22, 2010
MP3 Car Amplifier Schematic Circuits 150W
Internally trimmed offset voltage: 10 mV
Low input bias current: 50pA
Low input noise voltage: 25 nV
Low input noise current: 0.01 pA
Wide gain bandwidth: 4 MHz
High slew rate: 13 V/us
Low supply current: 3.6 m
High input impedance: 1012.
Low total harmonic distortion : <>