LX1721_04

AudioMAX™ INTEGRATED PRODUCTS LX1721 / 1722 Class-D Stereo Power Amplifier Controller P RODUCTION DESCRIPTION KEY FEATURES W WW . Microsemi . C OM The LX1721/1722 is a monolithic high performance Class-D stereo controller IC designed for high efficiency or space constrained audio requirements such as portable or battery operated products, automotive amplifiers, and multi-channel multimedia computer and video game applications. This high frequency, full audio bandwidth switching power amplifier controller offers dramatically improved performance over Linfinity’s previous generation amplifier products. Enhancements include higher output power, better SNR, lower noise floor, and reduced THD. Combined with output power MOSFET’s and an output filter, the LX1721/1722 is a complete Class-D audio solution. A complete audio amplifier module is available to quickly evaluate the LX1721 or LX1722 stereo controller. Simply connect the amplifier to the power source, audio signal, and speakers. Reference designs support a variety of requirements including multi channel systems, subwoofers, satellite / subwoofer combinations and various speaker loads (2Ω, 4Ω, 8Ω). The versatile amplifier solution can easily be adjusted for frequency response, optimized for efficiency and performance, or designed to minimize PCB area and component count. The LX1721/1722 is available in a space saving 44-pin QSOP package. (Continued Next Page) IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com PRODUCT HIGHLIGHT 7V - 25V Channel 1 Integrated Switching Class-D Stereo Controller IC Full 20Hz-20kHz Audio Bandwidth High Fidelity (LX1721) Or High Power (LX1722) Versions Available Single Supply Operation THD+N 60Wrms per Channel (LX1722, 4Ω, 1% THD+N) PSRR –70dB Typical Differential Input To Minimize Noise Effects Supports Multi-Channel Systems Complete LXE1721or LXE1722 Amplifier Evaluation Module Available 44-Pin QSOP Package APPLICATIONS Multimedia Speakers Surround Sound Game Systems Notebook Computers Desktop Computers Automotive Amplifiers And Head units Battery Operated Equipment (Megaphone, Public Address System) Portable Audio (Boom Box) Wireless Speakers High Power Subwoofer Automotive Audio Systems Home Theatre IN + IN FETs Left Output Power vs. Supply Voltage 1kHz, 4Ω, THD+N=1% LX1722 Stereo Channel 2 IN + IN CLOCK FETs Right 2 Ω , 4Ω , 8Ω LX1711 Channel 3 IN + IN - Mono FETs Subwoofer 2.1 Audio Amplifier Configuration LX1721 / 22 LX1721 / 22 PACKAGE ORDER INFO TJ (°C) -20 to 70 -20 to 70 VDD 7V – 15V 7V – 25V DB Plastic QSOP 44-Pin LX1721CDB LX1722CDB Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX1722CDBTR) Copyright © 2001 Rev. 1.2a,2004-06-10 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 1 AudioMAX™ INTEGRATED PRODUCTS LX1721 / 1722 Class-D Stereo Power Amplifier Controller P RODUCTION THERMAL DATA PACKAGE PIN OUT LFAOUT 1 44 LFBKLFBK+ LISN VDD CN PVDD PGND LN+ LP+ LPLNRNRPRP+ RN+ PGND CP PVDD NC RISN RFBK+ 22 23 RFBK- W WW . Microsemi . C OM DB 44-PIN QSSOP PACKAGE THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA 50°C/W CPWM RPWM LMUTE LEAOUT LEAIN VREF CLOCK GND V25 LIN+ LINLAMPOUT RIN+ RINRAMPOUT SLEEP STATUS RMUTE REAIN REAOUT RFAOUT Junction Temperature Calculation: TJ = TA + (PD x θJA). The θJA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow. DB PACKAGE (Top View) DESCRIPTION (CONTINUTED) The stereo output controller is available in either an LX1722 high power version (>65Wrms, 4Ω) with a supply voltage range of 7V-25V or an LX1721 high fidelity version (better SNR performance) with a supply voltage range of 7V-15V. The current rating of the external MOSFET’s, the available supply voltage, and speaker load primarily limits the maximum output power. The amplifier provides high fidelity performance and is designed to operate over the full 20Hz to 20kHz audio band. Signal distortion measurements yield. THD+N levels of 0.06%(1kHz, 1Wrms). Efficiency is greater than 80% typical, which eliminates the need for heatsinks in most applications. The AudioMAX™ solution requires a single supply voltage, simplifying input power requirements where a dual supply may not be available. To minimize potential environmental noise issues and ease the integration of the amplifier into a variety of applications, features such as a balanced/differential audio input and a high power supply rejection ratio help reduce the effects of noise from the audio signal or power supply. P D PACKAGE DATA Copyright © 2001 Rev. 1.2a,2004-06-10 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 2 AudioMAX™ INTEGRATED PRODUCTS LX1721 / 1722 Class-D Stereo Power Amplifier Controller P RODUCTION FUNCTIONAL PIN DESCRIPTION PIN NAME LFAOUT CPWM RPWM LMUTE LEAOUT LEAIN VREF CLOCK GND V25 LIN+ LINLAMPOUT RIN+ RINRAMPOUT DESCRIPTION Left Feedback Amplifier Output PWM Capacitor Connection PWM Resistor Connection Left Mute Input (Active High) Left Error Amplifier Output Left Inverting Input of Error Amplifier 5V Reference Input / Output Clock for Synch Operation Low Current Ground 2.5V Reference Left Positive Audio Input Left Negative Audio Input Left Input Amplifier Output Right Positive Audio Input Right Negative Audio Input Right Input Amplifier Output Sleep Input (active low) UVLO Indicator (Open Collector Output) Right Mute Input (Active High) Right Inverting Input of Error Amplifier Right Error Amplifier Output Right Feedback Amplifier Output PIN NAME LFBKLFBK+ LISN VDD CN PVDD PGND LN+ LP+ LPLNRNRPRP+ RN+ PGND CP PVDD NC RISN RFBK+ RFBKDESCRIPTION Left Feedback Amplifier Inverting Input Left Feedback Amplifier Non-Inverting Input Left Current Limit Sense Input Analog Supply Voltage Supply Decoupling for NFET Drivers Output Driver Supply Voltage Output Driver High Current Ground Left Drive for NFET on Positive Half of Bridge Left Drive for PFET on Positive Half of Bridge Left Drive for PFET on Negative Half of Bridge Left Drive for NFET on Negative Half of Bridge Right Drive for NFET on Negative Half of Bridge Right Drive for PFET on Negative Half of Bridge Right Drive for PFET on Positive Half of Bridge Right Drive for NFET on Positive Half of Bridge Output Driver High Current Ground Supply Decoupling for PFET Drivers Output Driver Supply Voltage No Connect Right Current Limit Sense Input Left Feedback Amplifier Non-Inverting Input Right Feedback Amplifier Inverting Input W WW . Microsemi . C OM SLEEP STATUS RMUTE REAIN REAOUT RFAOUT ABSOLUTE MAXIMUM RATINGS Supply Voltage (PVDD, VDD) ............................................................................................................................. -0.3V to 30V SLEEP , STATUS, R/LFBK+, R/LFBK- .................................................................................................-0.3V to VDD +0.3V R/LISN .........................................................................................................................................PVDD –2 to PVDD to +0.3V RPWM, CPWM, R/LMUTE ................................................................................................................... -0.3V to VREF +0.3V R/LIN+, R/LIN-, R/LAMPOUT.............................................................................................................. -0.3V to VREF +0.3V R/LEAIN, R/LEAOUT, R/LFAOUT ..................................................................................................... -0.3V to VREF + 0.3V CLOCK ........................................................................................................................................................-0.3V to CN +0.3V Operating Junction Temperature Plastic........................................................................................................................... 125°C Storage Temperature Range ...............................................................................................................................-65°C to 150°C Lead Temperature (Soldering, 10 seconds) ...................................................................................................................... 300°C Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into negative out of the specified terminal. PACKAGE DATA PACKAGE DATA Copyright © 2001 Rev. 1.2a,2004-06-10 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 3 AudioMAX™ INTEGRATED PRODUCTS LX1721 / 1722 Class-D Stereo Power Amplifier Controller P RODUCTION ELECTRICAL CHARACTERISTICS Unless otherwise specified, the following specifications apply over the operating ambient temperature -20°C < TA < 70°C (NOTE 2). Test conditions: RPWM = 34.8k, CPWM = 100pF, VDD = PVDD = 15V Parameter Evaluation Module (See LXE1721) Supply Voltage LX1721 LX1722 Power Supply Rejection Ratio Output Power (Per Channel) VDD PSRR PO VIN = 15V, VRIPPLE = 1VRMS, 20Hz to 20kHz VIN = 15V, RL=4Ω, THD+N=1%, 10Hz to 22kHz VIN = 25V, RL=4Ω, THD+N=1%, 10Hz to 22kHz VIN = 15V, fIN = 1kHz, PO = 10W VIN = 15V, fIN = 1kHz, PO = 20W THD+N SNR FOSC ICHG IDIS VPK VVAL (varies with VDD pin voltage) (varies with VDD pin voltage) (varies with VDD pin voltage) (varies with VDD pin voltage) VDD = 8V to 25V TA = 0 C to 70 C VIO AOL UGBW VOH VOL IIN IOUT = -100µA IOUT = +100µA VIN = 1V to 4V Set by Internal Resistors VOH VOL IOUT = -100µA IOUT = +100µA 180 3.465 3.85 1.3 1 3.5 3.535 3.5 100 O O W WW . Microsemi . C OM Symbol Test Conditions Min 7 7 LX1721 / 1722 Typ Max 15 25 -70 25 Units V dB W 60 82 85 .06 .2 81 450 -225 225 3.6 1.4 0.6 1.0 5 60 7 2 2 % % dBr kHz µA µA V V % % ‘mV dB ‘MHz V ‘mV µA V/V Efficiency Total Harmonic Distortion Plus Noise Signal-To-Noise Ratio Oscillator Section Oscillator Frequency Charge Current Discharge Current Oscillator Peak Voltage Oscillator Valley Voltage Voltage Stability Temperature Stability Error Amplifier Input Offset Voltage DC Open Loop Gain Unity Gain Bandwidth High Output Voltage Low Output Voltage Input Bias Current Input Amplifier Stage Gain Output Voltage, High Output Voltage, Low Input Impedance Feedback Amplifier Stage Gain Input Impedance LX1721 LX1722 LX1721 LX1722 fIN = 1kHz, PO = 1W fIN = 20Hz to 20kHz, PO = 1W RL = 4Ω, PO = 1W ELECTRICALS ELECTRICALS V V ‘kΩ 93 58 ‘mV/V ‘mV/V kΩ kΩ Set by Internal Resistors Set by Internal Resistors 89 56 91 57 250 400 Copyright © 2001 Rev. 1.2a,2004-06-10 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 4 AudioMAX™ INTEGRATED PRODUCTS LX1721 / 1722 Class-D Stereo Power Amplifier Controller P RODUCTION ELECTRICAL CHARACTERISTICS (CONTINUED) Parameter Current Limit Comparator Voltage Sense Threshold Blanking Pulse Delay Response Time IUM Pulses required to Current Limit Latch Consecutive Clear Pulses required to reset IUM counter Reference Voltage Section Initial Accuracy Voltage Stability Initial Accuracy Voltage Stability Line Regulation Load Regulation Under Voltage Lockout Section Start Threshold Voltage UV Lockout Hysteresis UVLO Delay To Output Enable Supply Current Sleep Current Operating Current Sleep to Output Enable Sleep Threshold Mute Section Mute Threshold Output Drivers For N-Channel MOSFETs NFET Drivers, Low Level Voltage VOL ISINK = 3mA ISINK = 100mA ISOURCE = 3mA, CN = 5.2V applied externally ISOURCE = 100mA, CN = 5.2V applied externally ISINK = 3mA 30 0.3 30 0.3 30 100 1.0 100 1.0 100 ‘mV V ‘mV V ‘mV 1.2 1.35 1.5 V 1.45 SLEEP Input = 0V, TA = 25 C SLEEP Input = 2V, VIN = 15V, No MOSFETs connected O W WW . Microsemi . C OM Symbol Test Conditions Min 190 LX1721 / 1722 Typ Max 210 500 250 230 Units mV ‘ns ‘ns Excluding blanking pulse 4 2 4 2 5.0 ± 50 2.5 ± 25 4 2 ‘cycles ‘cycles (VREF) (VREF) (V25) (V25) TA = 0 C to 70 C VDD = 9V to 15V IOUT = 0 to 10mA O O ± 100 ± 50 5 ‘mV mV ‘mV ‘mV ‘mV V mV clkcyc µA Temperature Stability 2 0.5 5 6 250 62,500 30 8 62,500 1.6 11 1.75 ‘mA clkcyc V NFET Drivers, High Level Voltage Output Drives For P-Channel MOSFETs VOH ISINK = 100mA 0.5 1.0 V ISOURCE = 3mA, CP = 5.2V 30 100 ‘mV (applied externally) PFET Drivers, High Level Voltage VOH ISOURCE = 100mA, CP = 5.2V 0.5 1.0 V (applied externally) Note 2: The LX1721 / 22CDB is guaranteed to meet performance specifications from 0° to 70°C. Specifications over the -20° to 0°C operation temperature range are assured by design, characterization, and statistical process control. PFET Drivers, Low Level Voltage VOL ELECTRICALS ELECTRICALS Copyright © 2001 Rev. 1.2a,2004-06-10 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 5 AudioMAX™ INTEGRATED PRODUCTS LX1721 / 1722 Class-D Stereo Power Amplifier Controller P RODUCTION BLOCK DIAGRAM W WW . Microsemi . C OM VDD 41 17 S LEEP 7 LISN 42 PVDD + CLK VREF UVLO & REFERENCE 10 V25 5V Reference 40 CN CLOCK RPW M CPW M 8 3 2 220m V SYNC OSC 27,39 PVDD CURRENT SENSE 5V Reference 28 CP LEAOUT 5 36 LP+ LEAIN 6 ERROR AMP FAULT TIMER LAMPOUT 13 OUTPUT DRIVERS & LOGIC Q Q 37 LN+ 34 LN35 LP- S CLK R LIN- 12 LIN+ 11 INPUT AMP MUTE 1 MUX LFAOUT MUTE 44 LFBK- 2.5V FEEDBACK AMP LMUTE 4 2.5V 43 LFBK+ FIGURE 1 – LX1721 / 22 SIMPLIFIED BLOCK DIAGRAM (LEFT CHANNEL CIRCUIT SHOWN) BLOCK DIAGRAM BLOCK DIAGRAM Copyright © 2001 Rev. 1.2a,2004-06-10 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 6 AudioMAX™ INTEGRATED PRODUCTS LX1721 / 1722 Class-D Stereo Power Amplifier Controller P RODUCTION APPLICATION INFORMATION W WW . Microsemi . C OM Frequency Synchronization Two or more LX1721 / LX1722 oscillators can be configured for synchronous operation. One unit, the master, is programmed for the desired frequency with the RPWM and CPWM as usual. Additional units will be slave units, and their oscillators will be disabled by leaving the RPWM pin disconnected. The CLOCK pin and the CPWM pin of the slave units should be tied to the CLOCK pin and the CPWM pin of the master unit respectively. In this configuration, the CLOCK pins of the slave units begin receiving instead of transmitting clock pulses. Also, the CPWM pins quit driving the PWM capacitor in the slave units. Note that for optimum performance, all slave units should be located within a few inches of the master unit. Oscillator Configuration (RPWM and CPWM selection) The oscillator is programmed by the external timing components RPWM and CPWM. For a nominal frequency of 333kHz, RPWM and CPWM should be set to 49.9kOhms and 100pF respectively. Note that in order to keep the slope of the PWM ramp voltage proportional to the supply voltage, both the ramp peak and valley voltages, and the charge and discharge currents are proportional to the supply voltage. This keeps the frequency relatively constant while keeping the slope of the PWM ramp proportional to the voltage on the VDD pin. For operating frequencies other than 333kHz, the frequency can be approximated by the following equation: Frequency = 1 (0.577)( RPWM )(CPWM ) + 320ns APPLICATION APPLICATION Copyright © 2001 Rev. 1.2a,2004-06-10 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 7 AudioMAX™ INTEGRATED PRODUCTS LX1721 / 1722 Class-D Stereo Power Amplifier Controller P RODUCTION CHARACTERISTIC CURVES 100 50 20 10 5 2 1 0.5 THD+N (%) 0.24563 0.2 0.1 0.06751 0.05 0.02 0.01 0.005 0.002 0.001 100m 200m 500m .9161 1 2 5 Output Power (W) 10 19.12 20 50 100 dx=-18.20 W dy=-0.17812 % W WW . Microsemi . C OM FIGURE 2 – THD+N VS. OUTPUT POWER VIN = 15V fIN = 1kHz RL = 4Ω 100 50 20 10 5 2 1 0.5 0.53924 THD+N (%) 0.2 0.1 0.0629 0.05 0.02 0.01 0.005 0.002 dx=58.73 W dy=0.47633 % FIGURE 3 – THD+N VS. OUTPUT POWER VIN = 25V fIN = 1kHz RL = 4Ω 0.001 100m 200m 500m 1 1.225 2 Output Power (W) 5 10 20 5 50 9.95 100 100 50 20 10 5 2 1 0.5 THD+N (%) 0.26783 0.2 0.1 0.05 0.04397 0.02 0.01 0.005 0.002 dx=-36.99 W dy=-0.22386 % FIGURE 4 – THD+N VS. OUTPUT POWER VIN = 15V fIN = 1kHz RL = 2Ω GRAPHS GRAPHS 0.001 100m 200m 500m 1 1.252 2 5 Output Power (W) 10 20 38.24 50 100 Copyright © 2001 Rev. 1.2a,2004-06-10 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 8 AudioMAX™ INTEGRATED PRODUCTS LX1721 / 1722 Class-D Stereo Power Amplifier Controller P RODUCTION CHARACTERISTIC CURVES (CONTINUED) 100 50 20 10 5 2 1 THD+N(%) 0.5 0.53924 0.2 0.1 0.05 0.05123 0.02 0.01 0.005 0.002 0.001 100m 200m 500m 1.136 1 2 5 Output Power (W) 10 20 50 109.9 100 200 300 dx=108.8 W dy=0.48800 % W WW . Microsemi . C OM FIGURE 5 – THD+N VS. OUTPUT POWER VIN = 25V fIN = 1kHz RL = 2Ω 100 50 20 10 5 2 1 0.5 THD+N (%) 0.2 0.19402 0.1 0.05 0.02322 0.02 0.01 0.005 0.002 0.001 20 dx=-4.8988 kHz dy=-0.17080 % FIGURE 6 – THD+N VS. FREQUENCY VIN = 15V RL = 4Ω PO = 1WRMS 50 126.2 100 200 500 1k Frequency (Hz) 2k 5.025k 5k 10k 20k 100 50 20 10 5 2 1 0.5 THD+N (%) dx=-4.8988 kHz dy=-0.11937 % FIGURE 7 – THD+N VS. FREQUENCY 0.2 0.1798 0.1 0.06044 0.05 0.02 0.01 0.005 0.002 0.001 20 50 126.2 100 200 500 1k Frequency (Hz) 2k 5.025k 5k 10k 20k VIN = 25V RL = 4Ω PO = 1WRMS GRAPHS GRAPHS Copyright © 2001 Rev. 1.2a,2004-06-10 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 9 AudioMAX™ INTEGRATED PRODUCTS LX1721 / 1722 Class-D Stereo Power Amplifier Controller P RODUCTION CHARACTERISTIC CURVES (CONTINUED) +10 +8 +6 +4 +2 +0 -0.965 -1.119 -2 -4 -6 -8 -10 10 dx=-17.869 kHz dy=-0.155 dB W WW . Microsemi . C OM FIGURE 8 – FREQUENCY RESPONSE Voltage Amplification (dBr) VIN = 15V RL = 4Ω PO = 1WRMS 18.2 20 50 100 200 500 1k 2k Frequency (Hz) 5k 10k 17.8875k 20k 50k 80k +10 +8 +6 +4 +2 +0 -1.436 -1.606 2 -4 -6 -8 -10 10 dx=-17.869 kHz dy=+0.170 dB FIGURE 9 – FREQUENCY RESPONSE Voltage Amplification (dBr) VIN = 25V RL = 4Ω PO = 1WRMS 18.2 20 50 100 200 500 1k 2k 5k 10k 17.8875k 20k 50k 80k Frequency (Hz) +10 +0 -10 -20 -30 -40 -50 dBV dx=-2.9880 kHz dy=+3.205 dB FIGURE 10 – NOISE FLOOR FFT -60 -70 -80 -90 -94.916 -100 -98.12 -110 -120 -130 -140 -150 20 50 100 200 500 .973932k 1k 2k 3.96192k 5k 10k 20k VIN = 15V RL = 4Ω 10Hz – 22kHz Bandwidth A-weighted GRAPHS GRAPHS Frequency (Hz) Copyright © 2001 Rev. 1.2a,2004-06-10 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 10 AudioMAX™ INTEGRATED PRODUCTS LX1721 / 1722 Class-D Stereo Power Amplifier Controller P RODUCTION CHARACTERISTIC CURVES (CONTINUED) W WW . Microsemi . C OM +10 +0 -10 -20 -30 -40 -50 -60 dBV -70 -80 -90 --94.11 96.079 -100 -110 -120 -130 -140 dx=-2.9880 kHz dy=-1.969 dB FIGURE 11 – NOISE FLOOR FFT VIN = 25V RL = 4Ω 10Hz – 22kHz Bandwidth A-Weighted -150 20 50 100 200 500 .973932k 1k Frequency (Hz) 2k 3.96192k5k 10k 20k 90% 85% 80% Efficency (%) FIGURE 12 – EFFICIENCY VS. OUTPUT POWER 75% 70% 65% 60% 55% 50% 45% 0 5 10 15 Output Power (W) VIN = 15V fIN = 1kHz 20 25 30 8Ω 4Ω 2Ω Power Supply Rejection Ratio (PSRR) FIGURE 13 – POWER SUPPLY REJECTION RATIO (PSSR) 0 -10 -20 Amplitude (dB) -30 -40 -50 -60 -70 -80 -90 -100 10 100 1000 Frequency (Hz) 15V+1,Left 15V+1,Right 15V-1,Left 15V-1,Right 10000 100000 PO = 1WRMS RL = 4Ω GRAPHS GRAPHS Copyright © 2001 Rev. 1.2a,2004-06-10 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 11 AudioMAX™ INTEGRATED PRODUCTS LX1721 / 1722 Class-D Stereo Power Amplifier Controller P RODUCTION APPLICATION LISN Q1 R8 24.3K 1% 5.1/1W JP1 Vcc 2 1 PGND Teminal 2 Vcc + C1 1000µF 25V Vcc Vcc C2 0.1uF/25V Vcc R6 0.020/1W LISN R9 Q2 15uH C29 0.68uF/50V R20 15/1W L1 OUTL+ C25 220pF R16 LFBK+ W WW . Microsemi . C OM PGND 5.1/1W LFBKLFBK+ R10 U1 R1 10k C7 100pF 1 2 3 C9 GND 18pF R5 34.8k 1% 4 5 R2 56.2k 1% C10 150pF + C13 1uF/10V,TANT C14 0.1uF/25V C3 LIN+ LINC4 0.47uF C5 0.47uF RIN+ RINC6 SLEEP 0.47uF 0.47uF 8 9 10 11 12 13 14 15 16 17 18 _MUTE R4 56.2k 1% C12 150pF 19 20 21 22 C11 18pF R3 10k LX1721-01CDB R14 RFBK+ RFBK5.1/1W L4 Q7 6 7 LFAOUT CPWM RPWM _LMUTE LEAOUT LEAIN VREF CLOCK GND V25 LIN+ LINLAMPOUT RIN+ RINRAMPOUT SLEEP STATUS _RMUTE REAIN REAOUT RFAOUT LFBKLFBK+ LISN VDD CN PVDD PGND LN+ LP+ LPLNRNRPRP+ RN+ PGND CP PVDD NC RISN RFBK+ RFBK44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 C16 0.1uF/25V Vcc C15 10uF/25V + PGND 15uH R17 5.1/1W L2 Q3 PGND C30 0.68uF/50V C31 0.47uF/50V OUTL- C17 4.7uF/25V,TANT Vcc C18 +47uF/25V C19 0.1uF/25V PGND + LN+ LP+ LPLNRNRPRP+ RN+ PGND C20 4.7uF/25V,TANT C21 47uF/25V + R11 Q4 LFBK24.3K 1% C26 220pF 5.1/1W LIN+ LIN- R18 Q5 R12 24.3K 1% 5.1/1W L3 OUTRR13 15uH Q6 C32 0.68uF/50V R21 15/1W C27 220pF RFBK- RIN+ RIN- C22 0.1uF/25V Vcc + 5.1/1W PGND C33 0.68uF/50V C34 0.47uF/50V OUTR+ Vcc Vcc R15 R7 0.020/1W RISN Q8 5.1/1W RISN 24.3K 1% C28 220pF 15uH R19 RFBK+ APPLICATION APPLICATION GND PGND FIGURE 14 – TYPICAL CLASS-D STEREO SWITCHING AMPLIFIER CIRCUIT APPLICATION Copyright © 2001 Rev. 1.2a,2004-06-10 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 12 AudioMAX™ INTEGRATED PRODUCTS LX1721 / 1722 Class-D Stereo Power Amplifier Controller P RODUCTION MECHANICAL DIMENSIONS W WW . Microsemi . C OM DB 44-Pin Quarter Size Outline Package (QSOP) 44 23 R E P 1 22 B D F ZD E A G C M L Dim A B C D E F G L M P R ZD *LC MILLIMETERS MIN MAX 2 .44 2.64 0 .28 0.51 0 .23 0.32 1 7.73 17.93 7 .40 7.60 0 .80 BSC 0 .10 0.30 0 .40 1.27 0° 8° 1 0.11 10.51 0 .63 0.89 0 .51 REF 0 .10 INCHES MIN MAX 0.096 0.104 0.011 0.020 0.091 0.0125 0.698 0.706 0.291 0.299 0.0315 BSC 0.004 0.012 0.016 0.050 0° 8° 0.396 0.414 0.025 0.035 0.020 REF 0.004 MECHANICALS MECHANICALS * Lead Coplanarity Note: Dimensions do not include mold flash or protrusions; these shall not exceed 0.15mm (.006”) on any side. Lead dimension shall not include solder coverage. Copyright © 2001 Rev. 1.2a,2004-06-10 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 13 AudioMAX™ INTEGRATED PRODUCTS LX1721 / 1722 Class-D Stereo Power Amplifier Controller P RODUCTION NOTES W WW . Microsemi . C OM NOTES NOTES PRODUCTION DATA – Information contained in this document is proprietary to Microsemi and is current as of publication date. This document may not be modified in any way without the express written consent of Microsemi. Product processing does not necessarily include testing of all parameters. Microsemi reserves the right to change the configuration and performance of the product and to discontinue product at any time. Copyright © 2001 Rev. 1.2a,2004-06-10 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 14