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Description: The NTE7011 is an integrated circuit in a 12−Lead SIP type package designed for use as a BTL power  amplifier with built−in headphone amp for portable stereo applications. Typical applications include  portable component stereos, car stereo, radio cassette recorders, and TV sound multiplex output. Features:  Low Quiescent Current, Low Distortion, Low Noise, High Output Power  Wide Supply Voltage range: VCC = 6 to 26V  Built−In Muting Circuit  Built−In Protection Circuits: Temperature, Surge, Overcurrent  Built−In Headphone Amplifier Circuit

Power Amplifier TDA1514 , this power use the IC TDA1514 , minimum require voltage 12 Volt  and maximum voltage 30 volts DC. Power output maximum 100 Watt mono with 8 ohms impedance. this circuit is High output power amplifier with IC. See schematic below :

This is very simple electronic circuit project of dual step-down power-supply (smps) controller circuit using the MAX17031. Dual step-down power-supply (SMPS) controller can be designed a very simple high efficiency power supply circuit with synchronous rectification, intended for main 5V/3.3V power generation in battery-powered systems. Dual Step-Down Power-Supply (SMPS) Controller Circuit Diagram: Low-side MOSFET sensing provides a simple low-cost, highly efficient current sense for valley current-limit protection. Combined with the output overvoltage and undervoltage protection features, this current limit ensures robust output supplies. The device includes independent shutdown controls with well-defined logic thresholds to simplify power-up and power-down sequencing. To prevent current surges at startup, the internal voltage target is slowly ramped up from zero to the final target over a 1ms period. The Max17031 can be used in applications like : Notebook Computers , Ultra-Mobile P...

Simple Subwoofer Amplifier Circuit Diagram with 30W Output power. This circuit with 30w output Power circuit. This Amplifier circuit is very suitable for use in subwoofer amplifier system based on IC SI1030G. Amplifier has 30W output with 8 ohm impedance. Supply voltage required minimum of 12 volts and a maximum of up to 22 volts DC. Simple Subwoofer Amplifier Circuit Diagram with 30W Output power   Parts List R1 = 100K R2 = 1R C1 = 2.2uF C2 = 100uF C3 = 47uF C4 = 100nF C5 = 10uF C6 = 47uF C7 = 100uF IC = SI1020GL , SI1030G

Power supply circuit to generate output below were variations between 1.3V DC to 12.2V DC with 1A current. In addition, the power supply circuit is also equipped with over-current protection or shield against belebih flow. Power supply circuit is very simple, but the quality is quite good, made her basiskan regulator IC LM723 is a pretty legendary. Description: R2 to set the output voltage. The maximum current is determined by R3, over-current protection circuit inside the LM723 to detect the voltage on R3, if it reaches 0.65 V, the voltage output will be off her. So the current through R3 can not exceed 0.65 / R3 although output short-circuit in his. C3 and C4 are ceramic capacitors, as much as possible directly soldered to the PCB, this is because the LM723 is prone to oscillation that is not cool. LM723 works with 9.5V input voltage to 40 V DC and the LM723 can generate its own current of 150mA when the output voltage is not more than 6-7V under input voltage. Specifications: Output...

Application Circuit:  2.1W Audio Power Amplifier Circuit Datasheet for AN7148: Download

Genereal Description: STK4017 fabricated on the IMST substrate of our own originality and designed for use in intermediate-power, single-channel, voltage amplifiers. Their packages are made much more compact than those of tje Type Nos. heretofore in use,  thereby meeting the requirements for making  the set smaller and slimmer.  Circuit diagram: 25W AF Power Amp Datasheet for STK4017: Download

Description Schematic : Minimum Voltage for this Circuit is 6 Volt , and Maximum voltage is 18 Volt . To recomended circuit working use voltage 12 Volt. Its not So much and less , its good. Output speaker is Mono with power 1,2 watt and Impedance 8 Ohm. IC equal with AN7130. See schematic circuit audio power amplifier AN7110 or AN7111 : Click to view Enlarge

This Bipolar power supply for battery instruments . This is a simple circuit diagram, this circuit to generate regulated ± 5-V supplies from a pair of dry batteries, the circuit of Fig. 1 is commonly used. In order to give protection from inadvertent reverse connection of a battery, a diode in series with each battery would produce an unacceptable voltage drop.  The more effective approach is to fit diodes Dl and D2 as shown in Fig. 2, in parallel with each battery. When the supply is switched off, there is the risk of a reverse bias being applied across the regulators, if there is significant inductance or capacitance in the load circuit. Diodes across the regulators prevent damage. When the power supply is switched on, the two switches do not act in unison.   Bipolar Power Supply Circuit Diagram There is a probability that one or the other regulators will be latched hard off by the other. To prevent this, D3 and D4 are Zener diodes so that ± 5-V rails are pulled up by...

The output voltage from the input voltage is an interesting property is appreciably lower switching power supply: It's produced by the current is smaller than the output current. However, input power (UI), of course, is higher than the output power. On the switch when low input voltage is too low, the regulator try to draw full current will need to be looked at another aspect. Supply can not cope with it, if it fails or the fuse blows. It (On / Off by input) switch to disable the regulator reduced, so is advisable. Related capacitor is charged until. If the regulator starts to draw current, charging current overload voltage source which is not already on a level declined. Soft Start For Switching Power Supply Circuit Diagram: The circuit in the diagram provides an output voltage of 5 V and is supplied by a 24 V source. The regulator need not be disabled until the capacitor is fully charged: when the potential across the capacitor has reached a level of half or more of the input vol...

This circuit is of an 2x 2,500W RMS stereo amplifier, super-light and without switching-mode power supply. The circuit just shows a channel, and the power supply that it assists to the two channels. The audio circuit should be duplicated, but the power supply assists to the two channels without problems. A special care should be destined to the insulating transformer of the audio line, that should be of audio-high-quality, of the type used in microphone pre amps input line. The whole group (2 channels) of 5,000W RMS it should not weigh more than 32 lbs, already inside of an appropriate metallic box. Warning This circuit is exclusively for amateur use. It contains not-isolated parts of the electric AC net and it can be very dangerous. The connections for the speakers are not isolated of the domestic AC net and it requests extra care. This procedure seeks to substitute a conventional power supply with great weight and cost reduction, without necessarily to use a switching-mode power supp...

Power supply with driver TEA1507 is mostly used by TV branded PHILIPS. Power Supply has an efficiency rate of up to 90% - thus requiring less cooling, as well as stand-by power required is less than 1 watt. Power Supply with TEA driver is equipped with a variety of surge protector that has a high reliability - not easily damaged if any part of a damaged power supply circuit and power transistor or FET heat is not easily damaged. Power supply circuits are dapatapat working on ac input voltage between 85 up to 275v. The way it works with the driver circuit power supply TEA 1507 is quite simple, so easy tracking of damage to the circuit. The picture above is the basic power supply circuit with TEA1507

RESISTOR TO REDUCE L200 POWER DISSIPATION ELECTRONIC DIAGRAM Instead of in series with the input, the resistor R can be connected between pins 1 and 2 of the IC if the load is constant. You can see this in the right figure. This will make some part of the load current flows through the resistor and the other part through the device.

This circuit use TA7222AP to amplifiers audio signal .The price only $0.99 and can provide 5.8 watt with Muting Control.Power supply can use for 8-12Vdc it is a good idea to use for car audio power amp , coin-op machine game, security system etc. link Fig 1. TA7222AP pin out Pin Name Description 1 Vcc Supply Voltage 2 RR Ripple Reject 3 MC Muting control 4 OP AF Signal Input 5 FB FB Filter 6 GA Gain adjust 7 GND Ground 8 GND Ground 9 OP AF Output 10 BS BootStrap Fig 2. schematic for 5.8 watt audio power amplifier

This 200W power amplifier circuit using IC STK 4050. STK 4050 is a power amplifier module is very powerful, because the IC is already a module then only needed a little extra components to build a reliable 200W Power Amplifier. Here is a picture series of Power Amplifier ICs 200W use STK 4050 complete with its power supply:

A small box is fitted to the rear of the amplifier providing a 9V output for the effect pedal. The amplifier section gets 9V through a pedal switch. This power output and guitar signal input lines are combined into a single unit with multi-way cable connecting points as shown in the following figure. Circuit diagram : Guitar Effect Pedal Power Circuit Diagram The circuit can be divided into two sections: power supply and signal handling. The power supply section is built around transformer X1, regulators 7805 and 7905, bridge rectifier comprising diodes D1 through D4, and a few discrete components. The signal-handling circuit is built around two OP27 op-amps (IC3 and IC4). The power supply of about 9V for the effect pedals is derived from step-down transformer X1. MOV1 is a metal-oxide varistor that absorbs any large spike in mains power.  IC 7905 (IC1) is a -5V low-power regulator. By using a 3.9V zener diode (ZD1) at its ground terminal, you get -8.9V output. The same technique ...

                                           This is the circuit diagram of 5V DC regulated power supply which featured with short circuit protection system. There are 2 kind of output that are regulated 5V DC with short circuit protection and without circuit protection. The main circuit is protected from any damage due to short-circuit in the additional power supply circuit by cutting off the derived supply voltage. The derived supply voltage restores automatically when shorting is removed. An indicator LED is utilized to show whether short-circuit exists or not. Power Supply Block: This circuit works just like the ordinary DC power supply adapter, in the main power supply circuit, 230V AC from main home electric source is stepped down by transformer X1 (230V AC primary to 0-9V, 3...

This is definitely an effective 4-output stage stabilized DC power supply unit for testing electronic circuits. It delivers very well regulated and stabilised output, that is important for most electronic circuits to provide good results. The circuit gives you an audio-visual indication if there is a short circuit in the PCB under test, so the power supply to the circuit ‘under test’ could be cut-off instantly to protect the important components from damage. The circuit gives you four different regulated DC outputs (12V, 9V, 6V and 5V) and an unregulated 18V DC output, that are selectable by way of rotary switch S2. The selected output is showed on the analogue voltmeter connected to the outputs rails. The circuit works by using a typical 18V-0-18V, 500mA step-down transformer to deliver 18V AC. A rectifier diode comprising diodes D1 and D2 supplies 18V DC, that is smoothed by capacitor C1 and given towards the combination of regulator ICs (IC1 through IC4). The regulator ICs deliver ...

Power amplifier Class-B is the most popular operating modes, and possibly more than 99% of the current series of power amplifier designed and manufactered are of this class. Defining the Class-B is the amount of bias voltage that causes conduction of both output devices to overlap with the current and thus produce the minimum amount possible crossover distrosi. This Class-B power amplifier performance : Power Output________________________50W RL Impedance_______________________8R Distortion__________________________Below 0.0006% at 1 kHz and 50W/8R Slew rate___________________________Approximately 35V/us Noise______________________________-91dBu at the output EIN_______________________________-117dBu (referred to input) Frequency response__________________+0, -0.5dB over 20Hz-20kHz Part List : Resistor R1,R8____________________________10K R2,R3,R13________________________100R R4_______________________________150R R5,R10___________________________1K R6,R7____________________________68R ...

Here is simple but low-cost power inverter circuit project. This power inerter any transformer can be use 6.3 or 12.6 V type. Low-cost Power Inverter Circuit Diagram: Apply the 12-Vde input so the positive goes to the transformer`s center tap and the negative goes to the two transistor emitters. Any bridge type rectifier and filter can be used at the output, if you need de.