PROTEC PA4401DQ-T7

95025
PA4401
Click-Pop Suppression Device
ANALOG PRODUCTS DIVISION
FEATURES
GENERAL DESCRIPTION
9V or 12V operation
3V RMS Capability
Power-Up and Power-Down “POP” suppression
ESD protected outputs
8-Lead SOIC package
Series operation
Only 1 external component required
Ron (On resistance):
0.8 ohms
Ron Flatness:
0.4 ohms
Total Harmonic Distortion:
<1%
Current drain:
<5mA
Load:
600 ohms
The PA4401 provides click-pop suppression for devices that
lack a click-less/pop-less startup or shutdown. The PA4401 is
placed between the codec and the output coupling capacitor.
The click-pop noise is generated at the coupling capacitors
while the system is starting up as well as shutting down.
The PA4401 controls the ramping of the DC voltage into the
coupling capacitors thus reducing the click-pop noise
generated during the startup and shutdown.
The start time can be controlled or changed using an external
capacitor.
ESD protection circuits are provided at the inputs and outputs
of the device.
The PA4401 consumes less than 5mA of current and
provides a THD of less than 1% for a load of 600 ohms.
APPLICATIONS
Portable DVD players
Set-top boxes
Car Audio
High End Audio
Televisions
Stereo Systems
Digital Video Recorders
LCD TVs
Home Theater systems
The PA4401 is available in an 8L-SOIC and DFN-6
Packages.
FUNCTIONAL DIAGRAM
Pin Layout and Description
VCC 1
In 1
Vcc
SOIC-8
2
VCC
7 Out 1
6 Out 2
3
SEL 4
5 GND
8 CEXT
1
DFN-6
7 Out 1
In 2 3
6 Out 2
SEL 4
5 GND
Output
Startup
&
Shutdown
Control
8 CEXT
In 1 2
In 2
Input
Pre
Amp
Pre
Amp
Input
Output
PA4401
Figure 1: Functional block diagram of PA4401
Ordering Information
Pin
Symbol
Designation
1
VCC
2
In1
Audio Input 1
3
In2
Audio Input 2
4
SEL
Select 12 or 9Volt Operation
5
GND
Ground
6
Out2
Audio Output 2
7
Out1
Audio Output 1
8
CEXT
External Capacitor
Voltage
Temperature
Range
Package
Part Number
SOIC-8
PA4401DQ-T7
DFN-6
PA4401DN-T7
-40 to 85 °C
SEL Logic
System Voltage
SEL Status
9V
Ground
12V
VCC
561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (480) 632-1715
www.protekanalog.com
95025. Rev0.0 12/10; PATENT PENDING; CONFIDENTIAL; COVERED BY NON DISCLOSURE AGREEMENT
NOT FOR USE IN LIFE SUPPORT SYSTEMS
PA4401
Click-Pop Suppression Device
ANALOG PRODUCTS DIVISION
ABSOLUTE MAXIMUM RATINGS
(All Voltages are referenced to GND)
VCC ........................................................................................+15V
Continuous Current (IN_, OUT_).....................................±150mA
Continuous Current (All Other Pins) .................................±20mA
Continuous Power Dissipation (TA = +70°C)
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature ......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS.
Unless otherwise specified, VDD=12V, SEL = VDD,TA = Ambient Temperature = 25 °C.
Symbol
Parameter
Condition
VDD
Power Supply
Normal Operation
IDD
Supply Current
Normal Operation
TA
Ambient Temperature
Normal Operation
RON
FET ON Resistance
Limit
Min
Typical
Max
Unit
9.0
12.0
V
5
mA
-40
+85
ºC
VGATE = 10V, IDFET = 100mA
1.8
2.0
VGATE = 15V, IDFET = 100mA
1.5
1.8
VGATE = 20V, IDFET = 100mA
1.3
1.5
15
-100
-108
Ω
RFLAT(ON)
ON Resistance Flatness
THD
Total Harmonic Distortion
XTALK
Crosstalk (on)
Over Input Voltage Range
RL = 600 Ω, VSIG = 2VRMS
f = 1kHz
f = 20kHz
QIRR
Off Isolation
f = 20kHz RL= 600 Ω
VSIG
Analog Signal Range
Normal Operation
VESD
ESD Protection
HBM
4
kV
ROUT
Output Discharge Resistor
100
kΩ
fCO
Bandwidth
>100
kHz
VUVLO
Power Off Threshold
90%
VCC
VCC Falling
.020
mΩ
1
dB
dB
2.0
561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (480) 632-1715
www.protekanalog.com
95025. Rev0.0 12/10; PATENT PENDING; CONFIDENTIAL; COVERED BY NON DISCLOSURE AGREEMENT
NOT FOR USE IN LIFE SUPPORT SYSTEMS
%
VRMS
PA4401
Click-Pop Suppression Device
ANALOG PRODUCTS DIVISION
DETAILED DESCRIPTION
Figure2. Shows the normal setup of a Pre Amplifier system. Since the system is built on a single ended power supply the
outputs of the pre-amplifier need to be routed through a bypass capacitor to get rid of the DC bias.
+
Power
Amp
Pre
Amp
+
Power
Amp
CODEC
Pre
Amp
Figure 2: Normal setup for a pre amplifier output
When the power supply to the system is turned ON there is a spike in the output of the system because of the charging of
various components in the system. This spike is called a “Click or Pop Noise”. When this click/pop noise passes through the
Power Amplifiers, the noise is amplified and listeners hear an audible ‘pop’ which causes discomfort. The reverse operation
happens when the system is powering down. These operations are shown below in figure3. The top waveform shows the power
supply Powering Up and Powering Down. The middle waveform shows the voltage appearing at the positive terminal of the
bypass capacitor. The bottom waveform shows the voltage at the output of the bypass capacitor. This is the Pop-Noise that is
amplified by the power amplifier.
t
VCC
t
50mS
50mS
Power Supply Waveform
0
VCC/2
Bypass capacitor input plate
>500mV
start-up “pop”
System output
0
>500mV
shutdown “pop”
time
mSec
Figure 3: Power Up and Power Down sequences and waveforms
561 E. Elliot Road #175, Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (602) 414-5141
www.protekanalog.com
95025. Rev.0. 05/2008
NOT FOR USE IN LIFE SUPPORT SYSTEMS
PA4401
Click-Pop Suppression Device
ANALOG PRODUCTS DIVISION
CONNECTION DIAGRAM
The PA4401 will be placed after the pre-amplifier and before the output bypass capacitors.
VCC
IN
Pre
Amp
IN
OUT
+
PA4401
CODEC
Pre
Amp
OUT
+
Figure 4: Typical Connection Configuration for PA4401
STARTUP
At Startup, the Power supply ramps from 0V to VCC between 20 -200ms. The PA4401 detects the ramp in the voltage at its inputs
and controls the ramp rate of the DC bias voltage going to the +ve terminal of the bypass capacitor. The ramping behavior of the
device can be controlled by an external capacitor. This startup operation is shown in figure 5.
SHUTDOWN
At Shutdown, The PA4401 detects a “power fail” condition and the control switches are turned off, opening the connection
between INx and OUTx providing a discharge path through an internal 100KΩ resistor for the bypass capacitor. The time
constant of the internal resistor and by-pass capacitor, allows for a slow discharge, which will prevent any audible “pop”
appearing at the system output. This shutdown operation is shown in figure 5.
VCC
t
t
50mS
50mS
Power Supply Waveform
0
VCC
PA4401 slows
down transition at
coupling capacitor
<50mV
Start-up “pop”
0
Bypass capacitor input plate
System output
<50mV
shutdown “pop”
time
mSec
Figure 5: Power-Up and Power-Down sequences and waveforms with PA4401
561 E. Elliot Road #175, Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (602) 414-5141
www.protekanalog.com
95025. Rev.0. 05/2008
NOT FOR USE IN LIFE SUPPORT SYSTEMS
PA4401
Click-Pop Suppression Device
ANALOG PRODUCTS DIVISION
Test Circuit for Turn-On time vs. CEXT and Turn-Off Time vs. CEXT
VDD
INx
VINx
VOUTx
Control
Element
50%
90%
VOUTx
50%
CEXT
10%
tON
R1
1MΩ
C1
tOFF
Turn-Off time vs. Cext
Turn-On time vs. Cext
60
800
700
50
600
Turn-Off Time (ms)
Turn-On Time (ms)
40
500
400
300
30
20
200
10
100
0
0
1
10
100
1000
10000
1
10
100
1000
Capacitor Value (nF)
Capacitor Value (nF)
CEXT (nF)
tON (mS)
tOFF (mS)
1
3.6
23
10
12
23
100
42
28
1000
300
32
2200
690
48
561 E. Elliot Road #175, Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (602) 414-5141
www.protekanalog.com
95025. Rev.0. 05/2008
NOT FOR USE IN LIFE SUPPORT SYSTEMS
10000
PA4401
Click-Pop Suppression Device
ANALOG PRODUCTS DIVISION
SO-8 PACKAGE OUTLINE & DIMENSIONS
PACKAGE OUTLINE
SO-8
-A-
8
5
+
-B - P
I
0.0I0” (0.25 MM) M B M
PACKAGE DIMENSIONS
4 PL
4
DIM
A
B
C
D
F
G
J
K
P
R
D
G
C
45
0 - I0
-T-
+
J
F
MILLIMETERS
MIN
MAX
4.80
3.80
1.35
0.35
0.40
1.27 BSC
0.18
0.10
5.80
0.25
INCHES
MIN
MAX
5.00
0.189
0.196
4.00
0.150
0.157
1.75
0.054
0.068
0.49
0.014
0.019
1.250
0.016
0.049
1.27 BSC 0.05 BSC 0.05 BSC
0.25
0.007
0.009
0.25
0.004
0.008
6.20
0.229
0.244
0.50
0.010
0.019
NOTES
0.0I0” (0.25 MM) M T B S A S
8 PL
MOUNTING PAD
0.050 + 0.005”
0.030 + 0.005”
1.
2.
3.
4.
5.
6.
- T - = Seating Plane and Datum Surface.
Dimensions “A” and “B” are Datum.
Dimensions “A” and “B” do not include mold protrusion.
Maximum mold protrusion is 0.015” (0.380 mm) per side.
Dimensioning and tolerances per ANSI Y14.5M, 1982.
Dimensions are exclusive of mold flash and metal burrs.
TAPE & REEL/BULK ORDERING NOMENCLATURE
0.I60 + 0.005”
0.045 + 0.005”
0.245” M!"
1.
2.
3.
4.
Surface mount product is taped and reeled in accordance with EIA-481.
Suffix-T7 = 7 Inch Reel - 1,000 pieces per 12mm tape.
Suffix-T13 = 13 Inch Reel - 2,500 pieces per 12mm tape.
No Suffix = Product Shipped in Tubes of 98 pcs per Tube.
Outline & Dimensions: Rev 1 - 11/01, 06009
561 E. Elliot Road #175, Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (602) 414-5141
www.protekanalog.com
95025. Rev.0. 05/2008
NOT FOR USE IN LIFE SUPPORT SYSTEMS
PA4401
Click-Pop Suppression Device
ANALOG PRODUCTS DIVISION
Package Outline and Dimensions DFN-8
Dim
L1
p
P1
P1
P2
P3
L1
L2
L3
p
G1
G2
L2
PA4401
XXXX
G2
P2
MILLIMETERS
MIN
TYP
MAX
2.95
3.00
3.05
2.95
3.00
3.05
0.70
0.75
0.80
0.23
0.25
0.27
0.35
0.40
0.45
0.02
0.02
0.02
0.60
0.65
0.70
2.25
2.30
2.35
1.50
1.55
1.60
Pin 1 Indicator
4
G1
TOP VIEW
1
0.30mm
0.65mm
BOTTOM VIEW
0.60mm
L3 P3
1.85mm
2.74mm
SIDE VIEW
2.60mm
Recommended Land Pattern
Tape and Reel Specifications
Reel Dia
A0
B0
K0
D
E
F
W
P0
P2
P
t-max
178 (7”)
3.00±0.10
3.00±0.10
0.85±0.10
1.50±0.10
1.75±0.10
3.50±0.05
12.00±0.30
4.00±0.10
2.00±0.05
4.00±0.10
0.25
P0
D
t
P2
10 Pitches Cumulative
Tolerance on Tape± 0.2
E
Pin 1
indicated
by Dot
Top cover tape
A0
F
W
B0
PA4401
XXXX
PA4401
XXXX
PA4401
XXXX
K0
P
Life Support Policy
PROTEK ANALOG'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF PROTEK DEVICES.
561 E. Elliot Road #175, Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (602) 414-5141
www.protekanalog.com
95025. Rev.0. 05/2008
NOT FOR USE IN LIFE SUPPORT SYSTEMS