STK1050 Audio Amplifier 50W

The following is the audio amplifier circuit which built based single power IC STK1050 from Sanyo. The ciruit capable to deliver up to 50W power audio output. Don forget to mount the heatsink to the power IC STK-1050

STK1050 Audio Amplifier Circuit

STK1050 Features:

• Does not require externally connected emitter resistors.
• Values of emitter resistors have carefully been reviewed to provide superior characteristics.
• Better supply voltage utilization permits designing power supply voltage that are about 0.7V (for RL=4ohms) lower than those required for previous DPP models.
• Maximum allowable power consumption for each resistor is 5W or higher, permitting accomodation for all loads.
• Peak allowable current is 18A or more, providing an ample margin even for peak currents under when short circuited or similar emergencies.
• In particular, maximum output 4 ohms have been enormously improved.
• Use of emitter resistors facilitates meeting different safety standards and designing PCBs
• Mutual interferences in the high-frequency range caused by layout of externally connected emitter resistors no longer exist. This facilitates lower distortion factors.
• Pins are used for emitter resistor output terminals that were not conected in previous DPPs. All other terminals remain uncharged; there is no need for major circuit board changes.

This amplifier circuit from  http://www.electronica.ro/audio/STK1050.shtml

READMORE...

LM4906 Very Simple Mini Amplifier Circuit

The LM386 is an excellent choice for many designs requiring a small audio power amplifier in a single chip. However, the LM386 requires quite a few external parts including some electrolytic capacitors, which unfortunately add volume and cost to the circuit. The LM4906 is capable of delivering 1 watt of continuous average power to an 8-ohm load with less than 1% distortion (THD+N) from a +5 V power supply. The chip happily works with an external PSRR (Power Supply Rejection Ratio) bypass capacitor of just 1 µF.

LM4906 Simple Mini Amplifier Circuit

LM4906 Pinout

The LM4906 also has an internal selectable gain of either 6 dB or 12 dB. A bridge amplifier design has a few distinct advantages over the single-ended configuration, as it provides differential drive to the load, thus doubling output swing for a specified supply voltage. Four times the output power is possible as compared to a single-ended amplifier under the same conditions (particularly when considering the low supply voltage of 5 to 6 volts).

READMORE...

TDA8551 Small Audio Amplifier Circuit

The TDA8551 is a small audio amplifier with an integrated volume control. When operated from +5 V, it delivers a nominal output power of more than one watt into 8 ohms. It can also be used over a supply voltage range of +2.7 to +5.5 V, with correspondingly reduced output power. The output volume can be adjusted from –60 dB to +20 dB in 64 steps, using a set of up and down push-buttons. The shared UP/DOWN input for the up and down switches has three states. If it is ‘floating’, which means that both of the switches are open, the volume remains unchanged. A pulse to earth decreases the volume by 1.25 dB, while a positive pulse increases the volume by 1.25 dB.

TDA8551 Small Audio Amplifier Circuit

TDA8551Pinout

The loudspeaker is connected in a floating configuration between the two outputs of the bridge amplifier in the TDA8551. This provides the desired output power level, in spite of the low supply voltage. For headphone applications, which do not need as much output power, you can connect the headphone between earth and one of the outputs, via an electrolytic coupling capacitor. You can make a stereo headphone amplifier in this way, using two TDS8551 ICs. The TDA8551 is housed in a DIP8 package. The SMD version is the TDA8551T, in an SO8 package.

READMORE...

LM4663 Mini Amplifier Circuit

This circuit is a 2.5W stereo power amplifier using LM4663. The LM4663 is a fully integrated single supply, high efficiency Class D audio power amplifier solution. The LM4663 utilizes a continuous time delta-sigma modulation technique that lowers output noise and THD when compared to conventional pulse width modulators.

 LM4663 Mini Amplifier  Circuit

 LM4663 Pinout

The LM4663 also features a stereo headphone amplifier that delivers 80mW into a 32Ω headset with less than 0.5% THD. The LM4663 has two stereo inputs that can be selected to drive either the headphone amplifier or the Class D amplifier. All amplifiers are protected with thermal shutdown.

In standby mode, the LM4663 draws an extremely low 2µA supply current. With a 4Ω load, the IC's efficiency for a 250mW power level is 69%, reaching 83% at a power level of 2W. The IC features click and pop reduction circuitry that minimizes audible popping during device turn-on and turn-off. The LM4663 is available in a 24-lead TSSOP package, ideal for portable and desktop computer applications. 

For more detail please read more

READMORE...

STK4231II Power Amplifier Stereo 100W

Here the circuit of  high power audio amplifier stereo with output at 100W max each output channel. Great output power with only using single chip.

STK4231II Power Amplifier Stereo Circuit 100W

The STK4231II IC will deliver audio power output about 100W pada setiap channel, so we can call this circuit as a 2x100W stereo power amplifier. This circuit must be supplied by using a dual polarity power supply and you have to install the heatsink on each IC to avoid overheating.

Download the power IC STK4231II datasheet

READMORE...

Op-Amp TL081 Audio Amplifier 12W

This is a circuit of audio amplifier that can deliver 12W to an 8 Ohm speaker. Op amp (TL081) is used as the preamplifier here. Actually any opamp with matching power supply ratings can be used instead of TL081.Transistors Q1 (TIP125)   and Q2 (TIP120) comprises the power amplifier stage. Output is taken from the collector junction of two transistors.

Op-Amp TL081 Audio Amplifier Circuit

Op-Amp TL081 Pinout

Note:

• Heat sinks are recommended for the transistors.
• A +15V/-15V dual DC power supply can be used to power the circuit.

For more details about Op-Amp TL081 Audio Amplifier circuit  please read more http://www.circuitstoday.com/simple-10w-audio-amplifier

READMORE...

STK439 Stereo Amplifier Circuit

The power amplifier circuit of this be regarded as highly popular In producer stereo readymade group that have both of amplifier radio tape plaything and tuner include in same group. This IC group produce from a factory sanyo have elect but beside vacate 7 watt go to until 20 watt RMS be , STK435 = 7W+7W (27Volt supply) , STK437 = 10W+10W (33V) , STK439 = 15W+15W (39V) , STK441 = 20W+20W (44V) , STK443 = 25W+25W (49V). 

STK439  Stereo Amplifier Circuit

STK439 

 If you take an interest to build this project as a result may assemble the equipment follows the circuit. By use IC every the number uses the circuit and PCB the alike. Except level Voltage that differently thus. the capacitors at use in the circuit especially electrolytic. should use model durability voltage the just right. Because of this circuit be model readymade half from a factory. When build finished then don’t have to fining decorates the circuit anyhow call that. if build not wrong also the work has immediately.

READMORE...

1 Watt Amplifier Circuit by LM390

This circuit is mini-size audio amplifier based on the LM383 chip. It is easy to construct and has only A Few external components so it is suitable for small applications or for those of you who are still in the learning

1 Watt  Amplifier Circuit by LM390

LM390 Pinout

 The LM390 Power Audio Amplifier is optimized for 6V, 7.5V, 9V operation into low impedance loads. The gain is internal- ly set at 20 to keep the external part count low, but the addition of an external resistor and capacitor between pins 2 and 6 wil increase the gain to any value up to 200. The inputs are ground referenced while the output is automati- cally biased to one half the supply voltage. By National Semiconductor Corporation

READMORE...