Fully differential audio power amplifier
General Description The ETK4993 is a fully differential audio power amplifier designed for portable communication device...
Description
General Description The ETK4993 is a fully differential audio power amplifier designed for portable communication device applications. It is capable of delivering 1.7 watt of continuous average power to an 8Ω BTL load , 2.5 watt of continuous average power to an 4Ω BTL load with less than 1% distortion (THD+N) from a 5V battery voltage. It operates from 2.2 to 5.5V. Features like 90dB PSRR at 217Hz, improved RFrectification immunity, the spacesaving DFN8, MSOP8 package, the advanced pop & click circuitry, a minimal count of external components and lowpower shutdown mode make ETK4993 ideal for wireless handsets. The ETK4993 is unitygain stable, and the gain can be configured by external resistors.
Features Fully differential amplifier Improved PSRR at 217Hz (VDD>3.0V) 90dB (typ) Ultra low shutdown current 0.01μA (typ) Improved pop & click circuitry eliminates noises during turnon and turnoff transitions Thermal overload protection circuitry No output coupling capacitors, bootstrap capacitors required Unitygain stable External gain configuration capability Available in spacesaving package: DFN8(ETK4993Y),MSOP8(ETK4993M)
Applications Wireless handsets Portable electronic devices PDAs, Handheld computers
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