EUA4890A
1 Watt Audio Power Amplifier
DESCRIPTION
The EUA4890A is an audio power amplifier designed for
portable communication device applications such as
mobile phone applications. The EUA4890A is capable of
delivering 1.0W of continuous average power to an 8Ω
BTL and with less than 1% distortion (THD+N) from a
5.0V power supply, and 350mW to a 8Ω BTL load from a
3V power supply.
The EUA4890A 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 EUA4890A contains circuitry to prevent from ”pop
and click” noise that would otherwise occur during turn-on
and turn-off transitions.
For maximum flexibility, the EUA4890A provides an
externally controlled gain (with resistors), as well as an
externally controlled turn-on and turn-off times (with the
bypass capacitor).
The EUA4890A is available in a 1.5mm×1.5mm WCSP
package.
FEATURES
2.5-5.5V operation
65dB PSRR at 217Hz, V
DD
=5V
0.1µA ultra low current shutdown mode
Improved pop & click circuitry
No output coupling capacitors, snubber networks or
bootstrap capacitors required
Thermal shutdown protection
Unity-gain stable
External gain configuration capability
BTL output can drive capacitive loads
RoHS compliant and 100% lead(Pb)-free
APPLICATIONS
Mobile Phones
PDAs
Portable electronic devices
Block Diagram
Figure1.
DS4890A Ver 1.2
Sep. 2007
1
EUTECH [ EUTECH MICROELECTRONICS INC ]
