IS31AP4991 Datasheet, PDF (1/12 Pages) Integrated Silicon Solution, Inc – 1.2W AUDIO POWER AMPLIFIER WITH ACTIVE-LOW STANDBY MODE

IS31AP4991
1.2W AUDIO POWER AMPLIFIER WITH ACTIVE-LOW STANDBY MODE
November 2011
GENERAL DESCRIPTION
The IS31AP4991 has been designed for demanding
audio applications such as mobile phones and permits
the reduction of the number of external components.
It is capable of delivering 1.2W of continuous RMS
output power into an 8Ω load @ 5V.
An externally-controlled standby mode reduces the
supply current to much less than 1μA. It also includes
internal thermal shutdown protection.
The unity-gain stable amplifier can be configured by
external gain setting resistors.
FEATURES
 Operating from V_CC = 2.7V ~ 5.5V
 1.2W output power @ V_CC = 5V, THD+N= 1%,
f = 1kHz, with 8Ω load
 Ultra-low consumption in standby mode (much
less than 1μA)
 65dB PSRR @217Hz in grounded mode
 Near-zero click-and-pop
 Ultra-low distortion (0.025%@0.5W, 1kHz)
 SOP-8 and MSOP-8 package
APPLICATIONS
 Mobile phones
 PDAs
 Portable electronic devices
 Notebook computer
TYPICAL APPLICATION CIRCUIT
Rfeed
20kΩ
Cfeed
Cin
Rin
0.22uF 20kΩ
Vin-
-
Vin+
+
Vcc
Vcc
Vout1
+ _Cs
1uF
Standby
Control
Cb +
1uF
Bypass
Standby
Bias
GND
-
AV = -1
+
Figure 1 Typical Application Circuit
Vout2
Integrated Silicon Solution, Inc. – www.issi.com
1
Rev.A, 11/22/2011