power amplifier. ETK4993 Datasheet
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.
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
External gain configuration capability
Available in spacesaving package: DFN8(ETK4993Y),MSOP8(ETK4993M)
Portable electronic devices
PDAs, Handheld computers