STEREO 25W (4Ω) CLASS-T™ DIGITAL AUDIO AMPLIFIER

General Description:
The TA2021B is a 25W (4Ω) continuous average per channel Class-T Digital Audio Power Amplifier IC using Tripath’s proprietary Digital Power Processing (DPPTM) technology. Class-T amplifiers offer both the audio fidelity of Class-AB and the power efficiency of Class-D amplifiers.

Applications 

• DVD Receivers 
• Mini/Micro Component Systems 
• Computer / PC Multimedia 
• Cable Set-Top Products 
• Televisions 
• Battery Powered Systems

Features:

• Class-T architecture 
• Single Supply Operation 
• “Audiophile” Quality Sound 
• 0.05% THD+N @ 13W 4Ω
• 0.1% THD+N @15.5W 4Ω
• 0.1% IHF-IM @ 1W 4Ω
• High Power 
• 25W @ 4Ω, 10% THD+N, VDD=14.6V 
• 23.5W @ 4Ω, 10% THD+N, VDD=14.2V 
• 14W @ 8Ω, 10% THD+N, VDD=14.2V 
• High Efficiency 
• 88% @ 13.5W 8Ω
• 81% @ 25W 4Ω
• Dynamic Range = 100 dB 
• Mute and Sleep inputs 
• Turn-on & turn-off pop suppression 
• Over-current protection 
• Over-temperature protection 
• Bridged outputs 
• 36-pin PSOP “Slug-Up” package 

Circuit Diagram:

STEREO 25W (4Ω) CLASS-T™ DIGITAL AUDIO AMPLIFIER

12W AF Power Amplifier for Car Radio, Car Stereo

Circuit Diagram:

Circuit Diagram for 12W AF Power Amplifier for Car Radio, Car Stereo

100W Audio Power Amplifier with Mute

General Description:

The LM4732 is a stereo audio amplifier capable of typically delivering 50W per channel of continuous average output power into a 4Ω or 8Ω load with less than 10% THD+N from 20Hz - 20kHz. The LM4732 has short circuit protection and a thermal shut down feature that is activated when the die temperature exceeds 150˚C. The LM4732 also has an under voltage lock out feature for click and pop free power on and off. Each amplifier of the LM4732 has an independent smooth transition fade-in/out mute. The LM4732 has a wide operating supply range from +/-10V - +/-40V allowing for lower cost unregulated power supplies to be used. The LM4732 amplifiers can easily be configured for bridge or parallel operation for 100W mono solutions.

Circuit Diagram:

100W Audio Power Amplifier with Mute

2 x 50 Watt High Efficiency Power Amplifier

General Description:

     The DDX-2060 power device is a monolithic dual  channel H-Bridge that can provide up to 50 watts  per channel of audio power at very high  efficiency. The DDX-2060 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. 

Circuit Diagram:

Layout 2 x 50 Watt High Efficiency Power Amplifier

Pcb top 2 x 50 Watt High Efficiency Power Amplifier

Pcb buttom 2 x 50 Watt High Efficiency Power Amplifier

Circuit Diagram 2 x 50 Watt High Efficiency Power Amplifier

10 + 10 + 10 Watts 3 ch AF Power Amplifier

STK400-530 10 + 10 + 10 Watts 3 ch AF Power Amplifier

20 Watt BTL Audio Amplifier

20 Watt BTL Audio Amplifier

60 W Quad Half-Bridge Digital Amplifier Power Stage

Features:
Configurable Outputs (10% THD+N)
– 2 x 30 W into 8 Ω, Full-Bridge
– 1 x 60 W into 4 Ω, Parallel Full-Bridge
– 4 x 15 W into 4 Ω, Half-Bridge
– 2 x 15 W into 4 Ω, Half-Bridge + 1 x 30 W 
into 8 Ω, Full-Bridge
 Space-Efficient, Thermally-Enhanced QFN 
Package
 PWM Popguard® Technology for Quiet Startup
 > 100 dB Dynamic Range - System Level
 < 0.12% THD+N @ 1 W - System Level
 Built-In Protection with Error Reporting
– Over-Current
– Thermal Warning
– Thermal Fault
– Under
Circuit Diagram:

60 W Quad Half-Bridge Digital Amplifier Power Stage