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TDA8922   g eneral description: The TDA8922 is a high efficiency class-D audio power amplifier with very low dissipation. The typical output power is 2 × 25 W. The device is available in the HSOP24 power package with a small internal heatsink and in the DBS23P through-hole power package. Depending on the supply voltage and load conditions, a very small or even no external heatsink is required. The amplifier operates over a wide supply voltage range from ±12.5 to ±30 V and consumes a very low quiescent current.  TDA8922 Audio Amplifier 2 x 25W TDA8922  features : High efficiency (∼90%) Operating supply voltage from ±12.5 to ±30 V Very low quiescent current Low distortion Usable as a stereo Single-Ended (SE) amplifier or as a mono amplifier in Bridge-Tied Load (BTL)  Fixed gain of 30 dB in Single-Ended (SE) and 36 dB in Bridge-Tied Load (BTL) High output power Good ripple rejection Internal switching frequency can be overruled by an external clock No swi...

This is the Simple 25W Low Power Inverter using TIP120  circuit diagram. This circuit is simple and low cost, easy built low power power inverter designed using IC 556 as multivibrator and transistor TIP120 to amplify the signal from multivibrator.This low power inverter consist of only 9 components and transform input voltage of 10 to 16 VDC into 60-Hz, 115-V squarewave power to supply AC electronic appliance with maximum power 25 W. 25W Low Power Inverter using TIP120 Circuit Diagram The first section of the 556 timer chip is wired as an astable oscillator with R2 and C1 setting the frequency. The output is available at pin 5. The second section is wired as a phase inverter. That output is available at pin 9. Resistors R3 and R4 keep output transstors Q1 and Q2 from loading down the oscillator. The two transistors drive the transformer push-pull fashion. When one transistor is biased-on, the other is cut-off. The transformer used in this circuit is a 120 V/18 VCT unit that is con...