Preliminary
EUA4992
2W Stereo Audio Power Amplifier
DESCRIPTION
The EUA4992 is a dual bridge-connected audio power
amplifier designed for portable communication device
applications such as mobile phone applications. The
EUA4992 is capable of delivering 1.3W of continuous
average power to an 8Ω BTL and with less than 1%
distortion (THD+N) from a 5.0V power supply, and
540mW to an 8Ω BTL load from a 3.3V power supply.
The EUA4992 provides high quality audio while requiring
few external components and minimal power consumption.
It features a low-power shutdown mode, which is achieved
by driving the
SHUTDOWN
pin with logic low.
The EUA4992 contains circuitry to prevent from ”pop and
click” noise that would otherwise occur during turn-on and
turn-off transitions.
For maximum flexibility, the EUA4992 provides an
externally controlled gain (with resistors), as well as an
externally controlled turn-on and turn-off times (with the
bypass capacitor).
The EUA4992 is available in a 3mm×3mm TQFN package.
FEATURES
Output Power at 1% THD+N, V
DD
=5V
-- 2W/CH (typ) into a 4Ω Load
-- 1.3W/CH (typ) into a 8Ω Load
Output Power at 1% THD+N, V
DD
=3.3V
-- 0.84W/CH (typ) into a 4Ω Load
-- 0.54W/CH (typ) into a 8Ω Load
Shutdown Current 0.04µA (typ)
Supply Voltage Range 2.5V to 5.5V
Suppress “ click and pop”
Thermal Shutdown Protection Circuitry
Micro Power Shutdown Mode
TQFN-16 (3mm
×
3mm) Package
RoHS compliant and 100% lead(Pb)-free
APPLICATIONS
Cell phones, PDA, MP4,PMP
Portable and Desktop Computers
Desktops audio System
Multimedia Monitors
Typical Application Circuit
Figure1.
DS4992
Ver 0.1
Jan. 2008
1
EUTECH [ EUTECH MICROELECTRONICS INC ]
