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Electronic Subwoofer Amplifier Circuit from Aliexpress

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1 to 4 W audio power amplifier

General Description:

The TDA1015 is a monolithic integrated audio amplifier circuit in a 9-lead single in-line (SIL) plastic package. The device is especially designed for portable radio and recorder applications and delivers up to 4 W in a 4 Ω load impedance. The very low applicable supply voltage of 3,6 V permits 6 V applications. 1 to 4 W audio power amplifier

Special features:

• single in-line (SIL) construction for easy mounting
• separated preamplifier and power amplifier
• high output power
• thermal protection
• high input impedance
• low current drain
• limited noise behaviour at radio frequencies

Circuit Diagram:

1 to 4 W audio power amplifier circuit diagram

Datasheet for TDA1015: Download

4 W audio power amplifier with DC volume control

GENERAL DESCRIPTION:

The TDA1013B is an integrated audio amplifier circuit with DC volume control, encapsulated in a 9-lead single in-line (SIL) plastic package. The wide supply voltage range makes this circuit ideal for applications in mains and battery-fed apparatus such as television receivers and record players. The DC volume control stage has a logarithmic control characteristic with a range of more than 80 dB; control is by means of a DC voltage variable between 2 and 6.5 V. The audio amplifier has a well defined open loop gain and a fixed integrated closed loop. This device requires only a few external components and offers stability and performance. 4 W audio power amplifier with DC volume control

Features:

• Few external components
• Wide supply voltage range
• Wide control range
• Pin compatible with TDA1013A
• Fixed gain
• High signal-to-noise ratio
• Thermal protection

PINNING:

1. power ground
2. amplifier output
3. supply voltage
4. electronic filter
5. amplifier input
6. control unit output
7. control voltage
8. control unit input
9. signal ground (substrate)

Circuit Diagram

4 W audio power amplifier with DC volume control

Datasheet for TDA1013B: Download

Stereo headphone amplifier

General Description:

The LM4910 is an audio power amplifier primarily designed for headphone applications in portable device applications. It is capable of delivering 35mW of continuous average power to a 32Ω load with less than 1% distortion (THD+N) from a 3.3VDC power supply. The LM4910 utilizes a new circuit topology that eliminates output coupling capacitors and half-supply bypass capaci-tors (patent pending). The LM4910 contains advanced pop & click circuitry which eliminates noises caused by transients that would otherwise occur during turn-on and turn-off. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. Since the LM4910 does not require any output coupling capacitors, half-supply bypass capaci-tors, or bootstrap capacitors, it is ideally suited for low-power tors, or bootstrap capacitors, it is ideally suited for low-power sumption are primary requirements.  Amplifier circuit

Features

• Eliminates headphone amplifier output coupling capacitors (patent pending)
• Eliminates half-supply bypass capacitor (patent pending)
• Advanced pop & click circuitry eliminates noises during turn-on and turn-off
• Ultra-low current shutdown mode
• Unity-gain stable
• 2.2V - 5.5V operation
• Available in space-saving MSOP and SOIC packages

Applications

• Mobile Phones
• PDAs
• Portable eletronics devices
• Portable MP3 players

Circuit diagram:

Stereo headphone amplifier

Amplifier circuit

LM2005 20 Watt Automotive Power Amplifier

General Description for LM2005:

The LM2005 is a dual high power amplifier, designed to deliver optimum performance and reliability for automotive deliver optimum performance and reliability for automotive vice to deliver 10W/channel into 2X (LM2005T-S), or 20W bridged monaural (LM2005T-M) into 4X, with low distortion. 

Features for LM2005:

Wide supply range (8V –18V)
Externally programmable gain
With or without bootstrap
Low distortion
Low noise
High peak current capability
POe20W bridge
High voltage protection
AC and DC output short circuit protection to ground or across load
Thermal protection
Inductive load protection
Accidental open ground protection
Immunity to 40V power supply transients
3§C/W device dissipation
Pin for pin compatible with TDA2005

Circuit diagram for LM2005:

LM2005 20 Watt Automotive Power Amplifier

Datasheet for LM2005: Download

20W Audio Power Amplifier LM1875

General Descripton for 20W Audio Power Amplifier:

The LM1875 is a monolithic power amplifier offering very low distortion and high quality performance for consumer audio applications. The LM1875 delivers 20 watts into a 4Ω or 8Ω load on ±25V supplies. Using an 8Ω load and ±30V supplies, over 30 watts of power may be delivered. The amplifier is designed to operate with a minimum of external components. Device overload protection consists of both internal current limit and thermal shutdown.The LM1875 delivers 20 watts into a 4Ω or 8Ω load on ±25V supplies. Using an 8Ω load and ±30V supplies, over 30 watts of power may be delivered. The amplifier is designed to operate with a minimum of external components. Device overload protection consists of both internal current limit and thermal shutdown.

Features for 20W Audio Power Amplifier:

• Up to 30 watts output power
• AVO typically 90 dB
• Low distortion: 0.015%, 1 kHz, 20 W
• Wide power bandwidth: 70 kHz
• Protection for AC and DC short circuits to ground
• Thermal protection with parole circuit
• High current capability: 4A
• Wide supply range 16V-60V
• Internal output protection diodes
• 94 dB ripple rejection
• Plastic power package TO-220

Applications for 20W Audio Power Amplifier

• High performance audio systems
• Bridge amplifiers
• Stereo phonographs
• Servo amplifiers
• Instrument systems

Circuit diagram for for 20W Audio Power Amplifier:

20W Audio Power Amplifier LM1875