IS31AP4832 Datasheet, PDF (1/19 Pages) Integrated Silicon Solution, Inc – DUAL 2.5W AUDIO POWER AMPLIFIER AND STEREO HEADPHONE DRIVER

IS31AP4832
DUAL 2.5W AUDIO POWER AMPLIFIER AND STEREO HEADPHONE DRIVER
WITH TONE CONTROL AND 3D ENHANCEMENT
January 2012
GENERAL DESCRIPTION
The IS31AP4832 is a monolithic integrated circuit that
provides tone (bass and treble) controls as well as a
stereo audio power amplifier capable of delivering
2.5W (Typ.) into 4Ω or 1.7W (Typ.) into 8Ω with less
than 10% THD with a 5V supply. The IS31AP4832
uses flexible I²C control interface for multiple
application requirements.
The IS31AP4832 also features 3D sound circuitry
which can be externally adjusted via a simple RC
network. The headphone amplifier features Output
Capacitor-less (OCL) architecture that eliminates the
output coupling capacitors required by traditional
headphone amplifiers.
The IS31AP4832 features a 13 step tone control for
the headphone and stereo outputs. The device mode
select and Tone are controlled through an I²C
compatible interface.
Thermal shutdown protection prevents the device from
being damaged during fault conditions. Superior click
and pop suppression eliminates audible transients on
power-up/down and during shutdown.
FEATURES
 3D enhancement
 Treble and Bass control
 I²C control interface
 Thermal shutdown protection
 Minimum external components
 Click-and-Pop suppression
 Micro-power shutdown
 Software & Hardware control shutdown function
 QFN-28(4mm × 4mm) package
Applications
 Cell phones, PDA, MP4,PMP
 Portable and desktop computers
 Desktops audio system
 Multimedia monitors
TYPICAL APPLICATION CIRCUIT
20K
2.2nF
2.2nF
30pF
7
8
14 12
Left
Left
Left Left
loop out tone in tone out loop in
-
+
Left
input
0.22uF 20K _{1 Left Input}
-
+
left channel
tone control
L
H ^VDD
ON
OFF
20 _{I2C Reset}
GND
-
I²C
BUS
0.68uF
9 ^SDA
10 SCL
16 _{Left 3D in}
+
I²C
interface
HP Logic
Right
input
5K
15 _{Right 3D in}
0.22uF 20K 21 _{Right input}
L
H ^VDD
Shutdown Working
GND
100K
6
SHUTDOWN
+
right channel
-
tone control
Right Right Right
loop out tone in tone out
30pF ²⁸
27
22
Right
loop in
23
20K
2.2nF
2.2nF
Biass
Click/pop
suppresion
Bypass
26
1µF
Figure 1 Typical Application Circuit
VDD
0.1uF
10uF
4,18
-
+
-
+
+
-
NOUTA 5
POUTA 3
SPEAKER
NOUTB 17
POUTB 19
SPEAKER
24
VOC
PHONE JACK
11,13,25
GND
Integrated Silicon Solution, Inc. – www.issi.com
1
Rev.A, 12/29/2011