PT2353_10 [PTC]
Satellite + Subwoofer 3-Speaker System Electronics Crossover IC; 卫星+低音炮3扬声器系统电子分频器IC
| 型号： | PT2353_10 |
| 厂家： | 
PRINCETON TECHNOLOGY CORP |
| 描述： | Satellite + Subwoofer 3-Speaker System Electronics Crossover IC |
| 文件： | 总17页 (文件大小：969K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Tel: 886-2-66296288
Fax:886-2-29174598
URL:http://www.princeton.com.tw
Satellite + Subwoofer 3-Speaker System Electronics Crossover IC
PT2353
DESCRIPTION
PT2353 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. PT2353 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: 0dB 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
PT2353 V1.2
- 1 -
March, 2006
Tel: 886-2-66296288
Fax:886-2-29174598
URL:http://www.princeton.com.tw
Satellite + Subwoofer 3-Speaker System Electronics Crossover IC
PT2353
BLOCK DIAGRAM
LIN
Main
Volume
HPF
LOUT
REF
3D
Effect
Circu it
HPF
ROUT
RIN
Main
Volume
REF
REF
+
+
VD D
REF
+
Subwoo fer
Volume
LPF
+
SOU T
VSS
REF
Control U nit
VDD
PT2353 V1.2
- 2 -
March, 2006
Tel: 886-2-66296288
Fax:886-2-29174598
URL:http://www.princeton.com.tw
Satellite + Subwoofer 3-Speaker System Electronics Crossover IC
PT2353
PIN CONFIGURATION
3D_LED
VDD
ROUT
RIN
1
28
27
26
25
24
23
22
21
20
19
18
17
16
15
/3D
2
VSS
3
LOUT
4
LIN
5
LT
RT
6
CL1
CR1
CR2
CR3
C2
7
CL2
PT2353
8
CL3
9
/SUP
/SDW 10
/MUP 11
/MDW 12
REF
C1N
C1P
SOUT
PO
13
OSC
14
/PK
PT2353 V1.2
- 3 -
March, 2006
Tel: 886-2-66296288
Fax:886-2-29174598
URL:http://www.princeton.com.tw
Satellite + Subwoofer 3-Speaker System Electronics Crossover IC
PT2353
PIN CONFIGURATION
Pin Name I/O
Description
Pin No.
1
3D Effect Enable Pin (Low: active)
/3D
VSS
LOUT
LIN
I
Ground Pin
Left Channel Output Pin
Left Channel Input Pin
―
O
I
2
3
4
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
LT
CL1
CL2
CL3
/SUP
/SDW
/MUP
/MDW
OSC
/PK
I
I
I
I
I
I
I
I
I
I
O
O
I
I
I
I
I
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
PO
SOUT
C1P
C1N
REF
C2
CR3
CR2
CR1
RT
I
I
I
I
O
―
RIN
ROUT
VDD
3D-LED O
PT2353 V1.2
- 4 -
March, 2006
Tel: 886-2-66296288
Fax:886-2-29174598
URL:http://www.princeton.com.tw
Satellite + Subwoofer 3-Speaker System Electronics Crossover IC
PT2353
FUNCTION DESCRIPTION
VOLUME CONTROL
Both main volume control and subwoofer volume control are supported by PT2353. Please refer to the
diagram below.
Signal Source
Main
Volume
Main Volume Output
HPF
(Only one channel is shown)
Control
LPF
Subwoofer
Volume
Control
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.
/MPU , /M DW, /SUP, /SD W
Inp ut Sta tus
Vo lume Contro l Statu s
α
t
T
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
PT2353 V1.2
- 5 -
March, 2006
Tel: 886-2-66296288
Fax:886-2-29174598
URL:http://www.princeton.com.tw
Satellite + Subwoofer 3-Speaker System Electronics Crossover IC
PT2353
VOLUME ATTENUATION
A PT2353 volume control circuit consists of ladder resistors and analog switches. The Tap for
Loudness Function (LT & RT) is connected to the Step 6 (-20dB). Therefore, the Loudness Function
Effect will be clearly audible when the volume setting is less than -20dB. Please refer to the attenuation
table given below.
Step
0
1
2
3
4
5
6
7
Attenuation
Step
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Attenuation
-32
0
-2
-4
-6
-34
-36
-38
-40
-42
-44
-46
-48
-50
-52
-54
-56
-58
-60
∞
-8
-10
-12
-14
-16
-18
-20
-22
-24
-26
-28
-30
8
9
10
11
12
13
14
15
PT2353 V1.2
- 6 -
March, 2006
Tel: 886-2-66296288
Fax:886-2-29174598
URL:http://www.princeton.com.tw
Satellite + Subwoofer 3-Speaker System Electronics Crossover IC
PT2353
The equivalent circuit is shown below.
OUT
IN
Step 0
Step 1
Step 2
29K
Step 9
LT
Step 10
Step 11
22K
Step 30
Step 31
AGND
VOLUME INITIALIZATION
After power is turned ON, the volume control value of the main channel is set to the initial setting of
-30dB step while the subwoofer channel will be set at 0dB.
The PT2353 loudness frequency response curve from Step 0 to Step 31 is given below.
Step 0
Step 31
PT2353 V1.2
- 7 -
March, 2006
Tel: 886-2-66296288
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URL:http://www.princeton.com.tw
Satellite + Subwoofer 3-Speaker System Electronics Crossover IC
PT2353
FILTER
The main channel of PT2353 includes the high pass filter which is used to filter out the main speaker’s
low frequency characteristics. The filtered signal is then combined with the subwoofer low pass filter
characteristics. This High Pass Filter is of Sallen Key Type with a pass band gain equivalent to 0dB.
Adjustment of the crossover frequency is made via the two external capacitors. Please refer to the
figure below.
C
C
LOUT/ROUT
CL1
CL2
CL3
Signal
In
－
+
REF
Subwoofer channel mixed from the Main Channel also uses the Sallen Key Type Low Pass Filter to
filter out the high frequency characteristics. Two external capacitors can be used to adjust the
crossover frequency. Please refer to the diagram below.
C1
REF
SOUT
C2
Signal
In
PT2353 V1.2
- 8 -
March, 2006
Tel: 886-2-66296288
Fax:886-2-29174598
URL:http://www.princeton.com.tw
Satellite + Subwoofer 3-Speaker System Electronics Crossover IC
PT2353
The subwoofer in this 3-speaker system has only one channel output; therefore, it is recommended
that the LPF must be less than 300Hz. If the frequency is greater than 300 Hz, then the audio output is
can be clearly discernible. That is, it is easy to know where the sound is coming from. The following
diagram provides the suggested crossover frequencies and respective external capacitors.
Notes:
⎯⎯⎯
- - -
— —
Crossover Frequency: 280Hz, C=0.015
Crossover Frequency: 200Hz, C=0.022
Crossover Frequency: 120Hz, C=0.033
µ
µ
µ
F, C1=0.047
F, C1=0.068
F, C1=0.1µF, C2=0.047µF
µ
µ
F, C2=0.018
F, C2=0.027
µ
µ
F
F
C is the High Pass Filter External Capacitor.
C1 and C2 are the Low Pass Filter External Capacitors
PT2353 V1.2
- 9 -
March, 2006
Tel: 886-2-66296288
Fax:886-2-29174598
URL:http://www.princeton.com.tw
Satellite + Subwoofer 3-Speaker System Electronics Crossover IC
PT2353
3D EFFECT FUNCTION
The 3D Pin controls the 3D effect function of PT2353. It toggles between turning the 3D effect function
ON or OFF. When the 3D effect function is enabled, the 3D LED is displayed. When the PO pin in low
state the 3D function and 3D LED is both inhibited.
POWER CONTROL
PK (Pin 14) is the PO Control Pin and is used to toggle between activating and deactivating the PO pin
(Pin 15). The power amplifier status (ON or OFF) may be controlled by connecting the external power
amplifier device to the PO Pin.
After the power supply is first applied to the VDD pin of PT2353, the output state for the PO and 3D pins
is LOW. During this state, all the control function keys are disabled, with the exception of the PK key.
When the PK key is pressed once, the PO is set to HIGH and all the control function keys are activated.
PT2353 V1.2
- 10 -
March, 2006
Tel: 886-2-66296288
Fax:886-2-29174598
URL:http://www.princeton.com.tw
Satellite + Subwoofer 3-Speaker System Electronics Crossover IC
PT2353
ABSOLUTE MAXIMUM RATING
Parameter
Operating voltage
Symbol
Vs
Rating
10.2
Unit
V
℃
Ambient temperature
Storage temperature
Topr
Tstg
-40 to +85
-65 to +150
℃
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, Tamb=25
℃
, VDD=9V, RL=100K
Ω
, f=1KHz)
Parameter
Power supply
Symbol
VDD
Condition
Min. Typ. Max. Unit
5
-
9.5
V
3D, PK OFF, VDD=9V
3D, PK OFF, VDD=4.5V
-
-
23
18
-
-
mA
mA
Operating current
Is
ATT=0dB, F=1KHz
VIN=1Vrms, 20Hz ~ 20KHz
All filters bypass, All outputs
-
0.01
-
Total harmonic distortion
THD
%
ATT=-20dB, F=1KHz
VIN=1Vrms, 20Hz ~ 20KHz
All filters bypass, All outputs
ATT=0dB, VIN=0V
A-weighting, All filters bypass
0dB=1Vrms, ATT=0dB
VIN=0V, A-weighting
All filters bypass
-
-
-
0.05
15
-
-
-
Output noise
NO
µV
dB
Signal-to-noise ratio
S/N
90
f=1KHz, ATT=0dB
VDD=9V
f=1KHz, ATT=0dB
All Outputs
-
-
Maximum input voltage
Voltage gain
VIMAX
Gn
2.7
0
-
Vrms
dB
-1
+1
0dB=1Vrms, f=1KHz
VIN=1Vrms, RL=100K
RG=600Ω, A-weighting
f=1KHz, VIN=1Vrms
LOUT, ROUT
Cross talk
CT
-
-
-86
-
dB
-75
-
dB
Maximum volume
attenuation
ATTMAX
Main volume =Max, SOUT
-
6.7
0
-
-
-75
-
-
6
5
-
9
3.2
-
dB
V
V
mA
mA
High level input voltage
Low level input voltage
LED sink current
VIH
VIL
IS
3D LED Pin
PO
Drive current
IO
-
Vout=100mV
f=1KHz
Output impedance
Input impedance
RO
RI
70
40
100
50
130
60
Ω
KΩ
PT2353 V1.2
- 11 -
March, 2006
Tel: 886-2-66296288
Fax:886-2-29174598
URL:http://www.princeton.com.tw
Satellite + Subwoofer 3-Speaker System Electronics Crossover IC
PT2353
APPLICATION CIRCUIT
VDD 9V
3D LED
VDD 9V
3D
1
28
27
26
25
/3D
3D_LED
VDD
ROUT
RIN
100uF
2
L OUT
VSS
R OUT
100K
100K
3
LOUT
10uF
10uF
VDD 9V
4
5
VDD 9V
LIN
LT
10uF
100K
**
**
1K
1K
24
23
L IN
R IN
RT
2K2
220
2K2
8n2
u33
8n2
u33
10uF
100K
**
**
BAV99
BAV99
6
CL1
CR1
220
C
C
C
C
22
REF
7
REF
CR2
CL2
CL3
8
21
20
19
18
17
16
15
CR3
PT2353
/SUP
9
/SUP
C2
REF
C1N
C1P
/SDW
/MUP
/MDW
10
11
REF
/SDW
/MUP
/MDW
C2
100uF
C1
12
13
10uF
33K
2u2
S OUT
SOUT
PO
OSC
/PK
100K
14
Power Key
*
Notes:
Please refer to the PT2353 Crossover Frequency Response Curve for the values of C, C1, and C2.
Please refer to Power Control (PO) Section of this document.
** For input port high voltage pulse protection.
PT2353 V1.2
- 12 -
March, 2006
Tel: 886-2-66296288
Fax:886-2-29174598
URL:http://www.princeton.com.tw
Satellite + Subwoofer 3-Speaker System Electronics Crossover IC
PT2353
ORDER INFORMATION
Valid Part Number
PT2353
Package Type
28 Pins, DIP, 600mil
28 Pins, SOP, 300mil
Top Code
PT2353
PT2353-S
PT2353-S
PT2353 V1.2
- 13 -
March, 2006
Tel: 886-2-66296288
Fax:886-2-29174598
URL:http://www.princeton.com.tw
Satellite + Subwoofer 3-Speaker System Electronics Crossover IC
PT2353
PACKAGE INFORMATION
28 PINS, DIP, 600MIL
PT2353 V1.2
- 14 -
March, 2006
Tel: 886-2-66296288
Fax:886-2-29174598
URL:http://www.princeton.com.tw
Satellite + Subwoofer 3-Speaker System Electronics Crossover IC
PT2353
Symbol
A
Min.
-
Max.
6.35
-
4.95
0.558
1.77
0.381
39.7
-
A1
A2
B
B1
C
D
D1
E
0.39
3.18
0.356
0.77
0.204
35.1
0.13
15.24
13.32
15.87
14.73
E1
e
2.54 BSC.
eA
eB
L
15.24 BSC.
-
17.78
5.08
2.93
Notes:
1.
2.
3.
Controlling Dimension: Millimeter
Dimensioning and tolerancing per ANSI Y14.5M-1982.
Dimensions “A”, “A1”< and “L” are measured with the package seated in JEDEC Seating Plane
Gauge GS-3.
4.
“D” and “E1” are dimensions for plastic packages, do not include mold flash or protrusions. Mold
flash or protrusions shall not exceed 0.10 inch (0.25mm).
5.
6.
“E” and “A” are measured with the leads constrained to be perpendicular to plane T.
“eB” and “oC” are measured at the lead tips with the leads unconstrained. “oC” must be zero or
greater.
7.
N is the maximum number of terminal positions. (N=28)
8.
9.
10.
Corner leads (I, N, N/2+1) may be configured as shown in Figure 2.
Pointed or rounded lead tips are preferred to ease insertion.
For automatic insertion, any raised irregularity on the top surface (step, mess, etc.) shall be
symmetrical about the lateral and longitudinal package centerlines.
Please refer to JEDEC MS-011 Variation AB.
11.
JEDEC is the trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION.
PT2353 V1.2
- 15 -
March, 2006
Tel: 886-2-66296288
Fax:886-2-29174598
URL:http://www.princeton.com.tw
Satellite + Subwoofer 3-Speaker System Electronics Crossover IC
PT2353
28 PINS, SOP, 300MIL
Symbol
Min.
2.35
0.10
0.33
0.23
17.70
7.40
Nom.
Max.
2.65
0.30
0.51
0.32
18.10
7.60
A
A1
B
C
D
E
e
1.27 BSC.
H
h
L
10.00
0.25
0.40
10.65
0.75
1.27
α
0°
8°
PT2353 V1.2
- 16 -
March, 2006
Tel: 886-2-66296288
Fax:886-2-29174598
URL:http://www.princeton.com.tw
Satellite + Subwoofer 3-Speaker System Electronics Crossover IC
PT2353
Notes:
1. Dimensioning and tolerancing per ANSI Y14.5-1982.
2. Dimension “D” does not include mold flash , protrusions or gate burrs. Mold Flash, protrusion or
gate burrs shall not exceed 0.15mm (0.006 in) per side.
3. Dimension “E” does not include interlead flash or protrusions. Interlead flash or protrusions shall
not exceed 0.25 mm (0.010 in) per side.
4. The chamfer on the body is optional. It is not present, a visual index feature must be located within
the crosshatched area.
5. “L” is the length of the terminal for soldering to a substrate.
6. “N” is the number of terminal positions. (N=28)
7. The lead width “B” as measured 0.36 mm (0.014 in) or greater above the seating plane, shall not
exceed a maximum value of 0.61 mm (0.24 in).
8. Controlling dimension: Millimeter
9. Refer to JEDEC MS-013 Variation AE
JEDEC is the trademark of JEDEC SOLID STATE TECHNOLOGY ASSOCIATION.
PT2353 V1.2
- 17 -
March, 2006
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