SGM4890_15 Datasheet, PDF (1/12 Pages) SG Micro Corp – 1.1W Audio Power Amplifier

SGM4890
1.1W Audio Power Amplifier
GENERAL DESCRIPTION
The SGM4890 is a 1.1W, fully integrated, audio power
amplifier. It is designed to maximize audio performance
in portable applications such as mobile phone. The
portable application requires audio power amplifier has
minimum of external components and can operate from a
single 2.5V to 5.5V power supply. SGM4890 is capable of
delivering 1.1W of continuous output power with typically
1% distortion (THD+N) when it drives an 8Ω speaker
from a 5.0V power supply.
The SGM4890 features a low power consumption
shutdown mode, which is achieved by driving the
shutdown pin with a logic low. Additionally, the SGM4890
features an internal thermal shutdown protection
mechanism.
FEATURES
 Ideal for Notebook Computers, PDAs, and
Other Small Portable Audio Devices
 1.1W into 8Ω BTL Load from 5V Supply at
THD+N = 1% (TYP)
 Excellent PSRR: Direct Connection to Battery
 Fast Turn-On Time
 Unity Gain Stable
 2.5V to 5.5V Operation
 Shutdown Current: 0.01μA (TYP)
 Shutdown Pin is Compatible with 1.8V Logic
 -40℃ to +85℃ Operating Temperature Range
 Small Packaging
The SGM4890 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.
For maximum flexibility, the SGM4890 provides an
externally controlled gain (with resistors), as well as an
externally controlled turn-on time (with the bypass
capacitor). When using a 1μF bypass capacitor, it offers
110ms wake-up time when V₊ is equal to 5.0V.
APPLICATIONS
Portable Systems
MP3 Players
Mobile Phone
PDAs
GPS
The SGM4890 is available in Green MSOP-8 package. It
operates over an ambient temperature range of -40℃ to
+85℃.
SG Micro Corp
www.sg-micro.com
REV. B