IS31AP2145E Datasheet, PDF (1/13 Pages) Integrated Silicon Solution, Inc – 2.7W@5.0V MONO CLIP-LESS & FILTER-LESS

IS31AP2145E
2.7W@5.0V MONO CLIP-LESS & FILTER-LESS
CLASS-D AUDIO POWER AMPLIFIER
DESCRIPTION
The IS31AP2145E is a 2.7W@5.0V mono, clip-less,
filter-less, high efficiency Class-D audio power
amplifier with automatic gain control.
The IS31AP2145E 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
IS31AP2145E 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 IS31AP2145E ideal
choice for cellular handsets, PDAs and other portable
applications.
IS31AP2145E is available in a 1.5mm×1.5mm
UTQFN-9 package.
January 2014
FEATURES
 Filter-less Class-D architecture
 AGC enable/disable function
 2.7W 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
 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
TYPICAL APPLICATION CIRCUIT
VBattery
1F
A2
VCC
0.1 F
B2
VREF
1F
Differential In
R1
CTRL1
R2
CTRL2
CIN
33nF _A1
A3
OUT+
IN+
C1 IS31AP2145E
IN-
CIN
33nF
C3
OUT-
C2
CTRL
0.1 F
B1,B3
GND
R3
Figure 1 Typical Application Circuit (Differential Input)
Integrated Silicon Solution, Inc. – www.issi.com
1
Rev. A, 01/08/2014