AmplifierCircuits: 2x50W

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9/30/2014

September 30, 2014

Controller class-D audio amplifier

General Description:

The TDA8929T is the controller of a two-chip set for a high efficiency class-D audio power amplifier system. The system is divided into two chips:

• TDA8929T; the analog controller chip in a SO24 package

• TDA8926J/ST/TH or TDA8927J/ST/TH; a digital power stage in a DBS17P, RDBS17P or HSOP24 power package.

With this chip set a compact 2 × 50 W or 2 × 100 W audio amplifier system can be built, operating with high efficiency and very low dissipation. No heatsink is required, or depending on supply voltage and load, a very small one. The system operates over a wide supply voltage range from ±15 up to ±30 V and consumes a very low quiescent current.

Circuit Diagram:

Controller class-D audio amplifier

Datasheet for TDA8929T: Download

9/10/2014

September 10, 2014

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: