LX1720 Audio Amplifier 2x20W

LX1720 general description:

The LX1720 controller IC contains the necessary functions to implement a stereo Class-D audio amplifier. A Class-D amplifier is a "switching" amplifier that converts a low-level, analog, audio input signal into a highpower, pulse-width modulated (PWM) output. The switching frequency is much higher than the audio band which allows high frequency out-of-band components to be removed with a simple LC filter. The LX1720 generates a PWM output by controlling external MOSFET's connected in a full-bridge configuration. Because the MOSFET's are either full "on" or full "off", their power dissipation is minimal allowing maximum power to be delivered to the speaker.

LX1720 Circuit:

LX1720 Audio Amplifier 2x20W

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One Chip AM/FM Radio with Audio Power Amplifier

Description: The integrated circuit TDA1083 includes, with exception of the FM front end, a complete AM-/FM-radio-circuit with audio power amplifier. An internal Z-diode stabilizes the supply voltage at VS 13 V, which allows with the aid of a resistor and a rectifier, the circuit to be driven by a higher external supply voltage. Features: Large supply voltage range VS = 3 to 12 V High AM-Sensitivity Limiting threshold voltage Vi = 50 V Audio output power P0 = 0.7 W AFC-connection for VHF-tuner AM-FM switching without high frequency voltages Applications: AM-/FM- and audio-amplifier Circuit Diagram: Circuit diagram for One Chip AM/FM Radio with Audio Power Amplifier Datasheet for TDA1083: Download

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