The NCP2890DMR2G is a 1W Audio Power Amplifier designed for portable communication device applications such as mobile phone applications. The NCP2890 is capable of delivering 1.0W of continuous average power to an 8R load from a 5.0V power supply and 320mW to a 4R load from a 2.6V power supply. The NCP2890 provides high quality audio while requiring few external components and minimal power consumption. It features a low-power consumption shutdown mode, which is achieved by driving the shutdown pin with logic low. The NCP2890 contains circuitry to prevent from pop and click noise that would otherwise occur during turn-on and turn-off transitions. For maximum flexibility, the NCP2890 provides an externally controlled gain (with resistors), as well as an externally controlled turn-on and turn-off times (with the bypass capacitor). Due to its excellent PSRR, it can be directly connected to the battery, saving the use of an LDO.
DESCRIPTION The LM4889 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1 watt of continuous average power to an 8Ω BTL load with less than 2% distortion (THD+N) from a 5VDC power supply. Boomer™ audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4889 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement. FEATURES • Available in Space-Saving VSSOP, SOIC, WSON, and DSBGA Packages • Ultra Low Current Shutdown Mode (3.3 to 2.6V - 0.01µA) • Can Drive Capacitive Loads up to 500 pF • Improved Pop & Click Circuitry Eliminates Noises During Turn-On and Turn-Off Transitions • 2.2 - 5.5V Operation • No Output Coupling Capacitors, Snubber Networks or Bootstrap Capacitors Required • Unity-Gain Stable • External Gain Configuration Capability APPLICATIONS • Mobile Phones • PDAs • Portable Electronic Devices