PT2313E
Stereo Audio Processor for Car Audio
Tel: 886-66296288
‧
Fax: 886-29174598
‧
http://www.princeton.com.tw
‧
2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan
DESCRIPTION
The PT2313E is an audio processor designed for
versatile application, includes 3 stereo input selector
with adjustable gain, master volume control with low
frequency loudness compensation, individual output
attenuator and tone control. It is a good solution for the
car audio signal processing.
Due to the high reliability requirement from the car
audio business, the PT2313E improves both audio
performances and input surge current capability, these
causes the PT2313E is the best solution for the
cost-effective car audio systems.
APPLICATIONS
• Car Audio
• Home Audio System
• Powered Speaker System
FEATURES
• 3 stereo inputs with gain selection, range from 0dB
to +11.25dB in 3.75dB/step
• Master volume from 0 dB to -78.75dB in
1.25dB/step
• Speaker attenuator for balance and fader, range
from 0dB to -38.75dB in 1.25dB/step
• Each channel output can be muted individually.
• Low frequency loudness compensation
• Bass and Treble control, range from -14dB to
+14dB in 2dB/step
• Wide operation range (VDD=4V to 10V)
• Improved and replace PT2313L
APPLICATION CIRCUIT
1
2
3
4
5
6
7
8
9
10
11
12
13
14 15
16
17
18
19
20
21
22
23
24
25
26
27
28REF
VDD
AGND
TREB_L
TREB_R
RIN
ROUT
LOUD_R
RIN3
RIN2
RIN1
LOU D_L
LIN3
LIN2 LIN1
LIN
LOUT
BOUT_L
BIN_L
BIN_R
BOUT_R
RROU T
LROUT
RFOU T
LFOUT
DGND
SDA
SCL
2.2uF
2.2uF
22uF
VDD
2.7n
2.7n
100n
100n
100n
100n
100n
100n
5.6K
5.6K
Front Left
Front Right
Rear Left
Rear Right
10uF
10uF
10uF
10uF
Power
Amplifier
2.2uF
2.2uF
2.2uF
2.2uF
2.2uF
2.2uF
AUDIO 1
AUDIO 2
AUDIO 3
2.2K
2.2K
2.2K
2.2K
2.2K
2.2K
L
L
L
R
R
R
Input Surge
Protection
MCU
PT2313E
PT2313E
V1.1 2 January 2010
BLOCK DIAGRAM
LOUT
LIN1
LIN2
LIN3
REF
LOUDNESS
LIN
LOUD_L
REF
BOUT_L
BIN_L
TREB_L
TREBLE
BASS
LFOUT
LROUT
REF
REF REF
REF
LOUDNESS
REF
TREBLE
BASS
RROUT
RFOUT
TREB_R
BOUT_R
LOUD_R
RIN
RIN3
RIN2
RIN1
ROUT
REF
VDD
REF
AGND
REF
SCL
SDA
DGND
I2C
DECODER
BIAS
BIN_R
Speaker Attenuator
With Mute
Master
Volume
Input SW and
G
AIN
Input SW and
G
AIN
INT
R
e
f
Loud
S
W