GENERAL DEscriptION
The SGM4809 is a dual audio power amplifier with active low shutdown mode. It is designed to maximize audio performance in portable applications. The audio power amplifier is designed for the portable application that needs low-component count and can operate from a single 2.5V to 5.5V power supply. Under the condition of using a 5.0V power supply to drive a 16Ω speaker, it can deliver a continuous average power of 158mW per channel, and the distortion (THD+N) is typically 0.1%.
The SGM4809 provides an active-low, micro-power consumption shutdown mode which is controlled externally and an internal thermal shutdown protection.
SGM4809 is applied to low power portable systems. Bootstrap capacitors or snubber networks are not needed.
The SGM4809 provides an externally controlled gain (with resistors), as well as an externally controlled turn-on time (with the bypass capacitor) for maximum flexibility.
The SGM4809 is available in a Green MSOP-8 package. It operates over an ambient temperature range of -40℃ to +85℃.
FEATURES
Supply Voltage Range: 2.5V to 5.5V
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)
Shutdown Pin is Compatible with 1.8V Logic
Pop/Click Reduction Circuitry
-40℃ to +85℃ Operating Temperature Range
Available in a Green MSOP-8 Package
APPLICATIONS
Mobile Phone
Portable Systems
Headphone Amplifier
Notebook Computers
Microphone Preamplifier
PDAs
GPS