SGM4809 Datasheet, PDF (1/10 Pages) SG Micro Corp – Headphone Amplifier

SGM4809
Dual 158mW Headphone Amplifier
with Active Low Shutdown Mode
GENERAL DESCRIPTION
The SGM4809 is a dual audio power amplifier capable of
delivering 158mW per channel of continuous average
power with typically 0.1% distortion (THD+N) when it
drives a 16Ω speaker from a 5.0V power supply. 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.
SGM4809 features an externally controlled, active-low,
micro-power consumption shutdown mode, as well as an
internal thermal shutdown protection mechanism.
FEATURES
 Active-Low Shutdown Mode
 158mW into 16Ω Load from 5V Power Supply at
THD+N = 0.1% (Typical, per Channel)
 87mW into 32Ω Load from 5V Power Supply at
THD+N = 0.1% (Typical, per Channel)
 Unity Gain Stable
 Shutdown Current: 0.6μA (TYP)
 2.5V to 5.5V Operation
 Shutdown Pin is Compatible with 1.8V Logic
 Pop/Click Reduction Circuitry
 -40℃ to +85℃ Operating Temperature Range
 Available in Green MSOP-8 Package
SGM4809 does not require bootstrap capacitors or
snubber networks. It is optimally suited for low power
portable systems.
For maximum flexibility, the SGM4809 provides an
externally controlled gain (with resistors), as well as an
externally controlled turn-on time (with the bypass
capacitor).
The SGM4809 is available in Green MSOP-8 package. It
operates over an ambient temperature range of -40℃ to
+85℃.
APPLICATIONS
Portable Systems
Headphone Amplifier
Microphone Preamplifier
Notebook Computers
Mobile Phone
PDAs
GPS
SG Micro Corp
www.sg-micro.com
REV. A. 2