Two-Channel 20 W BTL Audio Power Amplifier

Overview:

The LA4628 is a 2-channel general-purpose BTL audio power amplifier provided in a miniature package. It was designed for the best possible audio quality and features an extended low band roll-off frequency provided by a newly-developed NF circuit that does not require an external capacitor. Furthermore, crosstalk, which can cause muddiness in the audio output, has been significantly reduced by both circuit and wiring pattern improvements. Thus this amplifier can provide powerful lows an clear highs. Note that this device is pin compatible with the 13.5 W × 2-channel LA4625, and allows end products differentiated by their power rating to share the same printed circuit board.

Features:

• Total output: 20 W + 20 W (at VCC = 13.5 V, RL = 4 Ω,THD = 10%)
• High-fidelity design (fL < 10 Hz, fH = 130 kHz)
• Extremely low impulse noise levels
• An arbitrary amplifier startup time can be set up with external components.
• Full complement of built-in protection circuits (includes circuits that protect against shorting to VCC, shorting to ground, load shorting, overvoltages and excessive temperatures)

Circuit Diagram:

Two-Channel 20 W BTL Audio Power Amplifier

30 Watt stereo digital amplifier power stage

FEATURES

• 2 × 30 W (BTL) Into 6 Ω at 1 kHz 95-dB Dynamic Range (in System With TAS5026) < 0.2% THD+N (in System – 30 W RMS Into 6-Ω Resistive Load)
• Device Power Efficiency Typical >90% Into
• 6-Ω Load
• Self-Protection Design (Including
• Undervoltage, Overtemperature, and Short
• Conditions) With Error Reports
• Internal Gate Drive Supply Voltage Regulator
• EMI Compliant When Used With
• Recommended System Design

DESCRIPTION

The TAS5122 is a high-performance, integrated stereo digital amplifier power stage designed to drive 6-Ω speakers at up to 30 W per channel. The device incorporates TI’s PurePath Digital technology and is used with a digital audio PWM processor (TAS50XX) and a simple, passive demodulation filter to deliver high-quality, high-efficiency, true-digital audio amplification. The efficiency of this digital amplifier is typically greater than 90%. Overcurrent protection, overtemperature protection, and undervoltage protection are built into the TAS5122, safeguarding the device and speakers against

fault conditions that could damage the system.

Circuit Diagram:

30 Watt stereo digital amplifier power stage

30W BTL × 2ch Audio Power Amplifier

General Description:

The thermal resistance θj−T of TA8220H package designed for low thermal resistance, has high efficiency of heat radiation. The temperature rise of chip can be reduced, and the influence from the degradation of the features due to the temperature rise at the high output can also be reduced. This stereo audio power IC, designed for car audio use, has two  built−in channels to reduce the characteristic difference between L and R channels. It also contains output short detection circuit, output clip detection and various kind of protection. 

Features:

• Low thermal resistance: θj−T = 1.5°C / W (infinite heat sink) 
• High power: POUT (1) = 30W (typ.) / channel 
• (VCC = 14.4V, f = 1kHz, THD = 10%, RL = 2Ω) 
• : POUT (2) = 26W (typ.) / channel 
• (VCC = 13.2V, f = 1kHz, THD = 10%, RL = 2Ω) 
• : POUT (3) = 19W (typ.) / channel 
• (VCC = 13.2V, f = 1kHz, THD = 10%, RL = 4Ω) 
• Low distortion ratio: THD = 0.04% (typ.) 
• (VCC = 13.2V, f = 1kHz, POUT = 1W, RL = 4Ω, GV = 50dB) 
• Low noise: VNO = 0.30mVrms (typ.) 
• (VCC = 13.2V, RL = 4Ω, GV = 50dB, Rg = 0Ω, BW = 20Hz~20kHz) 
• Built−in stand−by function (with (4)pin set at low, power is turned off.): ISB = 1µA (typ.) 
• Built−in output short detection circuit ((9)pin: Open collector) 
• Built−in output clip detection circuit ((1)pin: Open collector) 
• Built−in various protection circuits 
• Protection circuits: Thermal shut down, Over voltage, Out→VCC short, Out→GND short and Out−Out short. 
• Operating supply voltage: VCC = 9~18V 

Circuit Diagram:

30W BTL × 2ch Audio Power Amplifier

2-Channel 30W BTL Audio Amplifier

Circuit diagram for 2-Channel 30W BTL Audio Amplifier

layout 2-Channel 30W BTL Audio Amplifier

2-channel 13.5 W BTL Audio Power Amplifier

2-channel 13.5 W BTL Audio Power Amplifier

Arduino 3W Stereo Amp

This article just promote for free whis project. Original article sourse www.adafruit.com/products/1788

Arduino 3W Stereo Amp

High Efficiency Power Amplifier 2 x 30W into 8Ω or 1 x 60W into 4 Ω

GENERAL DESCRIPTION

The DDX-2050 power device is a monolithic dual channel H-Bridge that can provide up to 30 watts 

per channel of audio power at very high efficiency. The DDX-2050 power device  contains a logic interface, integrated bridge  drivers, high efficiency MOSFET output  transistors and protection circuitry. The device  may be used as a dual bridge or reconfigured as  a single bridge with double the output current  capability.  The benefits of the DDX amplification system are  an all-digital design that eliminates the need for a  digital to analog converter (DAC) and the high  efficiency operation derived from the use of  Apogee's patented damped ternary pulse width  modulation (PWM). This approach provides an  efficiency advantage over conventional Class-D  designs and up to three times the efficiency of  typical Class A/B amplifiers with music input  signals.

Mono High Efficiency Power Amplifier 60 Watt

Stereo High Efficiency Power Amplifier 2 x 30 Watt