Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Satellite + Subwoofer 3-Speaker System Electronics Crossover IC
PT2353H
DESCRIPTION
PT2353H is a 3-speaker system electronic crossover IC utilizing CMOS Technology specially
designed for the new generation of audio equipments. 3-channel electronic volume control, 2-channel
2nd order high pass filter, 2nd order low pass filter and one mono subwoofer audio output are
incorporated into a single high performance chips. PT2353H combines the electronic volume controller
and crossover circuitry without MCU handling. Pin assignments and application circuit are optimized
for easy PCB layout and cost saving advantages.
FEATURES
•
•
•
•
•
•
•
•
CMOS Technology
Low Power Consumption
2 Built-in Individual Volume Control: 0 dB to -60dB
2-Channel 2nd Order High Pass Filter + 1 Mixed Mono Subwoofer Low Pass Filter
Cross-Over Frequency adjustable by external passive components
Control Interface of Volume Control: UP/DOWN Key (MCU is not necessary)
Built-in 3D Effect and Loudness Function
Supply Voltage: 5V to 9V
APPLICATION
•
Audio Equipments
PT2353H V1.1
-1-
November, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Satellite + Subwoofer 3-Speaker System Electronics Crossover IC
PT2353H
BLOCK DIAGRAM
L IN
Ma i n
Vo l u me
HP F
LOUT
RE F
3D
E ffe c t
C i rcu it
HP F
RIN
Ma i n
Vo l u me
ROUT
VD D
RE F
+
RE F
RE F
+
+
LP F
Su b w o o fe r
Vo l u me
+
SO U T
VS S
C o n t ro l U n it
RE F
3D
PO
/SUP
/MUP
/MDW
/SDW
/3D
/PK
VDD
PT2353H V1.1
-2-
November, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Satellite + Subwoofer 3-Speaker System Electronics Crossover IC
PT2353H
PIN CONFIGURATION
/3D
VSS
LOUT
LIN
LT
CL1
CL2
CL3
/SUP
/SDW
/MUP
/MDW
OSC
/PK
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
3D_LED
VDD
ROUT
RIN
RT
CR1
CR2
CR3
C2
REF
C1N
C1P
SOUT
PO
P T2 3 5 3H
22
21
20
19
18
17
16
15
PT2353H V1.1
-3-
November, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Satellite + Subwoofer 3-Speaker System Electronics Crossover IC
PT2353H
PIN CONFIGURATION
Pin Name
/3D
VSS
LOUT
LIN
LT
CL1
CL2
CL3
/SUP
/SDW
/MUP
/MDW
OSC
/PK
PO
SOUT
C1P
C1N
REF
C2
CR3
CR2
CR1
RT
RIN
ROUT
VDD
3D-LED
I/O
I
-
O
I
I
I
I
I
I
I
I
I
I
I
O
O
I
I
I
I
I
I
I
I
I
O
-
O
Description
3D Effect Enable Pin (Low: Active)
Ground Pin
Left Channel Output Pin
Left Channel Input Pin
Left Channel Center Tap (Loudness) Pin
Left Channel High Pass Filter Capacitor Pin 1
Left Channel High Pass Filter Capacitor Pin 2
Left Channel High Pass Filter Capacitor Pin 3
Subwoofer Channel Volume Up Control Pin (Low: Active)
Subwoofer Channel Volume Down Control Pin (Low: Active)
Main Volume Up Control Pin (Low: Active)
Main Volume Down Control Pin (Low: Active)
Oscillation Pin (connects to external RC components)
PO Control Pin (Low: Active)
Power Amplifier Control Pin (controlled by PK pin 14)
Subwoofer Channel Output Pin
Low Pass Filter External Capacitor Pin
Low Pass Filter External Capacitor Pin
Reference Voltage = ½ VDD
Low Pass Filter External Capacitor Pin 2
Right Channel High Pass Filter Capacitor Pin 3
Right Channel High Pass Filter Capacitor Pin 2
Right Channel High Pass Filter Capacitor Pin 1
Right Channel Volume Center Tap (Loudness) Pin
Right Channel Input Pin
Right Channel Output Pin
Positive Power Supply
3D LED Indicator Pin
Pin No.
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
28
PT2353H V1.1
-4-
November, 2005
Tel: 886-2-66296288
Fax: 886-2-29174598
URL: http://www.princeton.com.tw
Satellite + Subwoofer 3-Speaker System Electronics Crossover IC
PT2353H
FUNCTION DESCRIPTION
VOLUME CONTROL
Both main volume control and subwoofer volume control are supported by PT2353H. Please refer to
the diagram below.
Signal Source
HPF
LPF
Subwoofer
Volume
Control
Main Volume Output
(Only one channel is shown)
Subwoofer Output
The main volume control is used to adjust all audio volume levels. The subwoofer volume control can
be adjusted to match the main volume control. The Main Volume Control is determined by the MUP
and MDW pins. If the MUP is connected to the Ground, the main volume level output may be increased.
If the MDW is connected to the Ground, the main volume level output can be decreased.
The Subwoofer Volume Control is determined by the SUP and SDW pins. If the SUP is connected to
Ground, the subwoofer volume level output can be increased. If the SDW is connected to the Ground,
the subwoofer volume level output can be decreased.
When each of the MUP, MDW, SUP, SDW pins are connected to the GND for an indefinite period of
time, please refer to the following diagram.
/M PU , /M D W, /S UP, /SD W
Inp ut Sta tus
Vo lum e C on tro l Statu s
t
T
α
Notes:
1. t=Default Key Time
2. T=Hold Time (10 x 1/fosc)
3.
α=Volume
UP/DOWN Switch Time (2 x 1/fosc)
4. fosc=Internal Oscillation Frequency
PT2353H V1.1
-5-
November, 2005
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