IS31AP2145A Datasheet, PDF (1/14 Pages) Integrated Silicon Solution, Inc – 2.9W@5.0V MONO CLIP-LESS & FILTER-LESS CLASS-D

IS31AP2145A
2.9W@5.0V MONO CLIP-LESS & FILTER-LESS CLASS-D
AUDIO POWER AMPLIFIER
December 2011
GENERAL DESCRIPTION
FEATURES
The IS31AP2145A is a 2.9W@5.0V mono, clip-less,
filter-less, high efficiency Class-D audio power
amplifier with automatic gain control.
The IS31AP2145A integrates AGC (Automatic Gain
Control) function to automatically prevent distortion of
the audio signal by which we can enhance audio
quality and also protect the speaker from damage at
high power levels. The AGC function and its attack
time/release time are selectable via the CTRL pin. The
IS31AP2145A also provides thermal and over current
protection functions.
In addition to these features, 90% high efficiency,
improved RF-rectification immunity, a fast start-up time
and small package size make IS31AP2145A ideal
choice for cellular handsets, PDAs and other portable
applications.
IS31AP2145A is available in a 1.5mm×1.5mm
UTQFN-9 package.
 Filter-less Class-D architecture
 AGC enable/disable function
 2.9W into 4Ω at 5.0V (10% THD+N)
 Power supply range: 2.7V to 5.5V
 Selectable attack and release times
 Minimum external components
 High efficiency: 90%
 Click-and-pop suppression
 Low shutdown current: 0.1μA
 Short-circuit and thermal protection
 Space-saving UTQFN-9, 1.5mm × 1.5mm
APPLICATIONS
 Wireless or cellular handsets and PDAs
 Portable navigation devices
 Portable DVD player
 Notebook PC
 Educational toys
 USB speakers
 Portable gaming
TYPICAL APPLICATION CIRCUIT
VBattery
1F
A2
VDD
0.1 F
B2
VREF
1F
Differential In
CTRL1
CTRL2
R1
R2
R3
CIN
33nF _A1
A3
OUT+
IN+
C1 IS31AP2145A
IN-
CIN
33nF
C3
OUT-
C2
CTRL
0.1 F
B1,B3
GND
Figure 1 Typical Application Circuit (Differential Input)
Integrated Silicon Solution, Inc. – www.issi.com
1
Rev.A, 11/20/2011