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