Philips CEM2000/00 Service Manual page 25

Princeton Technology Corp
DESCRIPTION
The PT7313E is an audio processor designed for
versatile application, including 3 stereo input selectors
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 PT7313E improves both audio
performance and input surge current capability that
solution for the cost-effective
make PT7313E the best
car audio systems.
APPLICATIONS
• Car Audio
• Home Audio System
• Powered Speaker System
APPLICATION CIRCUIT
Input Surge
P rotection
L
2.2uF
2.2K
A UDIO 3
R
2.2uF
2.2K
L
2.2uF
2.2K
A UDIO 2
R
2.2uF
2.2K
L
2.2uF
2.2K
A UDIO 1
R
2.2uF
2.2K
V1.0
ANGUS ELECTRONICS CO., LTD
Tel: (852) 2345 0540 Fax: (852) 2345 9948 Web Site: www.angus.com.hk
.
PT7313E
PT2313E
22uF
1 REF
VDD 2 VDD
3 AGND
4
TREB_L
2.7n
5 TREB_R
2.7n
6 RIN
2.2uF
7 ROUT
8 LOUD_R
100n
9 RIN3
10 RIN2
11 RIN1
12 LOUD_L
100n
13 LIN3
14 LIN2
Stereo Audio Processor for Car Audio
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)
SCL 28
MCU
SDA 27
DGND 26
LFOUT 25
10uF
RFOUT 24
10uF
LROUT 23
10uF
RROUT 22
10uF
BOUT_R 21
100n
BIN_R 20
5.6K
100n
BOUT_L 19
100n
BIN_L 18
5.6K
100n
LOUT 17
2.2uF
LIN 16
LIN1 15
1
PT7313E
Front Left
Front Right
Rear Left
Rear Right
P ower
A mplifier
February 2010