NCP2809AEVB: Stereo Audio Amplifier Evaluation Board

The NCP2809A is a cost-effective, fixed-gain, stereo audio power amplifier capable of delivering 135 mW of continuous average power per channel into a 16 ohm load. The device is designed to provide high quality output power at low supply voltages with minimal external components. The device incorporates a proprietary virtual ground circuit that allows speakers to be connected directly to the amplifier without bulky DC blocking capacitors. Since the NCP2809 does not require bootstrap capacitors or buffer networks, it is ideal for low power portable systems. The internal gain of the NCP2809A is 0 dB. The demonstration board consists of two circuit configurations to demonstrate operation with and without output DC blocking capacitors. Features and ApplicationsFeatures135 mW output into 16 ohm loads from 5.0 V supplyExcellent PSRR (85 dB typical): Connect directly to a batteryPop and click protection circuitUltra-low current shutdown mode2.2 V - 5.5 V operationExcellent total harmonic distortion + noise (THD+N): Thermal overload protection circuitThe


NCP2809A is a cost-effective fixed gain stereo audio power amplifier capable of delivering 135 mW of continuous average power per channel into 16 ohm loads. This device has been specifically designed to provide high quality output power from low supply voltage, requiring very few external components. The device incorporates a proprietary virtual ground circuit which allows the speakers to be directly connected to the amplifier without the need for bulky DC blocking capacitors.Since NCP2809 does not require bootstrap capacitors or snubber networks, it is optimally suited for low-power portable systems. The NCP2809A has an internal gain of 0 dB.The demo board consists of two circuit configurations to demonstrate operation with and without the output DC blocking capacitors.
Features and Applications


Features
135 mW to a 16 ohm Load from a 5.0 V Power Supply
Excellent PSRR (85 dB Typical): Direct Connection to the Battery
Pop and Click Noise Protection Circuit
Ultra Low Current Shutdown Mode
2.2 V - 5.5 V Operation
Outstanding Total Harmonic Distortion + Noise (THD+N):
Thermal Overload Protection Circuitry