AmplifierCircuits

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

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....

TDA8926J circuit diagram for  2 x 50 W class-D audio amplifier