lxe1710/1711 audioma lxe1710/1711 audiomax evaluation kit
Contents
1. 90 60 85 80 i 4 75 40 70 5 o E o 30 8 65 E 8 60 520 55 4 10 50 45 0 0 5 10 15 20 25 30 6 11 Output Power W 40 Vin 15V fiv 1kHz R 40 THD N 1 16 Supply Voltage Vin FREQUENCY RESPONSE THD N VS OUTPUT POWER 20 Ap F 100 E 50 15 10 E 3 E i 10 50 100 200 500 1k 2k 5k 10k 50k 80k 0 001 50m 100m200m 500m Frequency Hz Vin 15V Vin 15V R 40 fin 1kHz Ro 1Wems R 40 Copyright 2000 Microsemi Rev 1 2a 2001 11 26 Linfinity Microelectronics Division 10 20 0 ES gt Output Power W Page 8 11861 Western Avenue Garden Grove CA 92841 714 898 8121 Fax 714 893 2570 LXE1710 1711 EVALUATION BOARD USER GUIDE PRINTED CIRCUIT BOARD LAYOUT CN1 RCA Jack J3 Optional Connections TB1 Power Supply Terminal Block Audio In Audio In Audio In V GND Silkscreen Layer J1 Sleep Jumper J2 Mute Jumper TB2 Audio Output Terminal Block OUT OUT Copyright 2000 Microsemi Page 9 Rev 1 2a 2001 11 26 eae Linfinity Microelectroni2. LC filter design section for recommended inductor and capacitor modifications 4 Audio Input Connection Connect your audio source to the RCA Jack CN1 Audio In For other type interfaces the audio input signal can also be connected to the amplifier board using the J3 In and In location Strip Line Plugs can be inserted into J3 for connectivity 5 Jumper Selection Controls The on off or enable to the module is controlled with the SLEEP signal Jumper J1 connects the SLEEP to on or off SLEEP is an active Low control Jumper J2 connects the MUTE control which enables disables the audio input to the amplifier MUTE is an active High signal See table below 6 Power Source If a power supply is being used make sure it is set to the correct voltage level and turn the power supply on 7 Audio Source Make sure the audio source signal is set to a minimum level Start or play audio source and adjust source volume to desired level 8 Listen to AudioMAX If the amplifier is not operating properly verify preceding steps or contact Linfinity for technical assistance 714 898 8121 To Speaker To Speaker To Power Supply V 7V 15V for LX1710 J J 7V 25V for LX1711 umper umper toward toward paren ON oating To Power Supply Amplifier Amplifier Amplifier Ground enabled disabled disabled SLEEP is SLEEP is SLEEP is OFF ON ON Optional Audio Input Audio
3. BOARD USER GUIDE QUICK START GUIDE The LXE1710 1711 Evaluation Board is a_ fully functional Class D Amplifier Connection to a single supply voltage VDD from either a battery or power supply speakers and your audio source is all that is required to begin evaluating the amplifier and listening to music The following outlines the necessary connections and control jumpers 1 Verify contents of Evaluation Kit The easy to use amplifier is all contained on a single board Visually inspect to see if the board or any components were damaged during shipping All components are located on the top side of the PCB except for the decoupling capacitor C17 A copy of the LX1710 1711 Datasheet can be downloaded from the Microsemi com website 2 Power and Ground Connections The voltage supply and ground connections are made through terminal block TB1 Connect your 7V to 15V for the LXE1710 or 7V to 25V for the LXE1711 power supply or battery to the V input of TB1 Connect your supply or battery ground to the GND input of TB1 Please ensure the correct positive and ground connections are made before turning on the power supply 3 Speaker Connection The amplifier is designed to drive a single 40 speaker Connect speaker and to the OUT OUT input of terminal block TB2 respectively The amplifier can be used to drive other speaker loads but frequency response may not be optimal See
4. Division 11861 Western Avenue Garden Grove CA 92841 714 898 8121 Fax 714 893 2570 LXE1710 1711 EVALUATION BOARD USER GUIDE ELECTRICAL CHARACTERISTICS Unless otherwise specified the following specifications apply over the operating ambient temperature 0 C lt TA lt 70 C For test circuit see LXE1710 Evaluation Board Schematic diagram PARAMETER SYMBOL TEST CONDITIONS MIN UNITS Supply Voltage 1 1710 VDD 7 15 V LX1711 VDD 7 25 V Vin 15V Po 38W 220 Supply Current IDD THD N 1 3 A Quiescent Current IQ Vin 15V No Input 43 mA Vin 15V R 280 THD N 1 10Hz to 22kHz bi Li Vin 15V R 240 THD N 1 25 Output Power PO ARIE Wore eke Vin 15V R 220 THD N 1 40 10Hz to 22kHz Vin 25V R 240 THD N 1 50 W 10Hz to 22kHz Vin 15V fin 1kKHz Po210W 82 Efficiency Vin 15V fin 1kKHz Po 20W 85 Total Harmonic Distortion Plus THD N fin 1kHz Po 1W 0 05 Noise fin 20Hz to 20kHz Po 1W 0 3 Signal To Noise Ratio SNR 81 dBr Xm Vin 15V V ippig7 1 Vnus Power Supply Rejection Ratio PSRR 10Hz to 10kHz 70 dB Copyright 2000 Microsemi Page 7 Reve 12 2001 11 26 Linfinity Microelectronics Division 11861 Western Avenue Garden Grove CA 92841 714 898 8121 Fax 714 893 2570 LXE1710 1711 EVALUATION BOARD USER GUIDE PERFORMANCE GRAPHS EFFICIENCY VS OUTPUT POWER OUTPUT POWER VS SUPPLY VOLTAGE
5. E teat Dose adem oc bu Do a ciae sd 6 Electrical Charaeteristi6s rtp E e eed host ll bg rta he 7 Performance 8 chase sh oma e 9 Printed Gircuit eta on d Re aSa nate cada coe hu 10 Bill of Materials eo Ein op t wd URS 11 Copyright 2000 Microsemi Page 3 Reve 12 2001 11 26 Linfinity Microelectronics Division 11861 Western Avenue Garden Grove CA 92841 714 898 8121 Fax 714 893 2570 LXE1710 1711 EVALUATION BOARD USER GUIDE Part Number Product LX1710CDB LX1711CDB power Controller IC LXE1710 Eveluction Board LXE1711 Description Vpp 7V to 15V Switching Class D Mono Power Amplifier IC 28 Pin SSOP Package Vpp 7V to 25V Switching Class D Mono Power Amplifier IC 28 Pin SSOP Package Fully Operational Mono Audio Amplifier 25W 40 Fully Operational Mono Audio Amplifier 50W 40 LX1710 1711 AUDIOMAX EVALUATION BOARD FEATURES AND CIRCUIT DESCRIPTION e Fully Assembled Mono Evaluation Board with Class D Controller IC e Improved SNR and Noise Floor Performance e Output Power of 25W typical LX1710 15Vpp 4Q 196 THD N e Output Power of 50W typi
6. Input Audio Input Audio In enabled disabled enabled MUTE is MUTE is ON MUTE is Optional OFF OFF Audio In Table 1 Jumper Settings To Audi 0 Audio 1 Source lt Copyright 2000 i H Rev 1 2a 2001 11 26 Microsemi Page 5 Linfinity Microelectronics Division 11861 Western Avenue Garden Grove CA 92841 714 898 8121 Fax 714 893 2570 LXE1710 1711 EVALUATION BOARD USER GUIDE SCHEMATIC to C9 C22 28 c E RS1 D Apr NC 10347 220 25V C13 S o 22uF 27 yt CP p 23 ANF R12 re a1 R5 34 8K TURNUM 10 ohm L1 15pH CPWM oan cte C1 100pF HF es 22 2 23k m 15 ohm 4 N ca 68 TW t V25 R11 C7 10 50V cia _ GND LX1710 NT ATUF SLEE 20 xz Vouk N E SLEEP R6 gt esu 19 MUTE 10 ohm ATUF 11 MUTE E um vot ni INPUT Nc 9 INAMPOUT R8 10K 21 z Q4 L2 15uH 97 INPUT N R10 C26 470nF 10 ohm R4 330pF T 19 24 3K PGND io INPUT C10 220pF R9 10K C14 AME 470nF n NC EN 18 VW C5 18pF 14 16 i R156 2K C4 EROU cake 131 EAIN 17 15 status 12 R2 10K LXE1710 Evaluation Board Schematic Shh Uc Microsemi Page 6 Reve 12 2001 11 26 Linfinity Microelectronics
7. J 1 0 8 Resistor 15 Ohm 5 1W 2512 R13 1 9 Resistor Low Value Flat 0374 IRC LR2010 01 R0374 F 2512 RS1 1 Copyright 2000 Microsemi Page 11 Rev 1 2a 2001 11 26 Linfinity Microelectronics Division 11861 Western Avenue Garden Grove CA 92841 714 898 8121 Fax 714 893 2570
8. LXE1710 1711 EVALUATION BOARD USER GUIDE LXE1710 1711 AUDIOMAX EVALUATION KIT USER S GUIDE s Microsemi E 52 VRINFANITY DIVAS TON M QAM ee LX1710 Class D Mono Power Amplifier Controller lt Microsemi LINFINITY DIVISION Copyright 2000 Microsemi Page Rev 1 2a 2001 11 26 Linfinity Microelectronics Division 11861 Western Avenue Garden Grove CA 92841 714 898 8121 Fax 714 893 2570 LXE1710 1711 EVALUATION BOARD USER GUIDE INTRODUCING LX1710 1711 AUDIOMAX Thank you for your interest in the latest generation of AudioMAX products The LXE1710 1711 evaluation board is a fully functional mono amplifier designed to demonstrate the new and improved Switching Class D Power Amplifier IC from Linfinity Microsemi The LX1710 1711 is a completely new controller design with superior performance over the LX1720 stereo controller IC Key improvements include better SNR lower noise floor and reduced THD therefore resulting in a much quieter and cleaner sounding amplifier The evaluation board has been configured with easy to use terminal block connections for power supply battery hook up and speaker connections An RCA jack or separate audio pins allow a quick interface to your audio source Jumpers are also provided to enable disable the amplifier Sleep control and to turn off the audio input Mute control With minimal setup the user can be listening to the amplifier
9. MU AROBEC ABLATA 1206 C4 1 3 Capacitor COG 220pF 50V 596 AVX 12065C221JAT2A 1206 C6 C7 2 4 Capacitor X7R 330pF 50V 1096 Panasonic ECU V1H331KBM 1206 C26 1 Novacap 1206B474M160NT 0 5 Capacitor X7R 47uF 16V 2096 AVA BORN CATANIA OR 1206 C3 C14 2 Novacap 1206B105K500NT 0 6 Capacitor X7R 1uF 50V 10 DUM JOBE ADEM TOR 1206 C1 C2 2 Novacap 0805N101J500NT 0 7 Capacitor 100pF 50V 5 AV ORORECHOLIAT ON 0805 C16 1 8 Capacitor Tant 0 1uF 35V 20 AVX TAJA104M035R 3216 C9 1 9 Capacitor Tant 2 2uF 25V 2096 Kemet T491A225M025AS 3216 C13 1 Kemet T491A475M016AS 1 0 10 Capacitor Tant 4 7uF 16V 20 RVXOLATAATEMOTR 3216 C10 C11 2 11 Capacitor Stacked MF 0 1uF 50V 596 Panasonic ECQ V1H104JL TH C8 C12 C22 3 12 Capacitor Stacked MF 0 47uF 50V 5 Panasonic ECQ V1H474JL TH C18 C19 2 13 Capacitor Stacked MF 0 68uF 50V 596 Panasonic ECQ V1H684JL TH C20 C21 2 14 Capacitor Elect 2200 25V 20 El na RV 25V221MH10 R NT C17 1 RESISTORS Line n M Reference Part Description Part Description Case t Item Designators Qty 1 Resistor 10K 5 1 4W 5 CR32J103T 1206 R2 1 2 Resistor 24 3K 1 1 4W 5 CR32F2432T 1206 R3 R4 2 3 Resistor 10 Ohm 5 1 8W 5 CR J100T 0805 R6 R10 R11 R12 4 4 Resistor 10K 5 1 8W 5 CR21J103T 0805 R8 R9 2 5 Resistor 34 8K 1 1 8 ASJ CR21F3482T 0805 R5 1 6 Resistor 20K 596 1 8W 5 CR J203T 0805 R7 1 7 Resistor 56 2K 196 1 8W ASJ CR21F5622T 0805 R1 1 KOA RM73B3A150
10. cal LX1711 25Vpp 4Q 196 THD N The AudioMAX Evaluation Amplifier Board allows the user to quickly connect evaluate the LX1710 1711 Switching Class D Mono Controller IC Easy to connect terminal blocks and an RCA plug are provided for interfacing to Power Speaker and Audio Input connections The single stage output filter has been configured to drive a 4O load and support full audio bandwidth amplification See Audio Application Note for LC filter design component selection calculations and suggested inductor and capacitor values for other loads The Evaluation Board operates from a single supply voltage The Class D Amplifier Controller IC requires a minimal number of external components to create a complete amplifier solution See Evaluation Board Schematic and Bill of Materials for circuit specifics A Class D Amplifier is a switching amplifier that converts a low level analog audio input signal into a high power pulse width modulated PWM output The switching frequency 430kHz typical but can be adjusted is much higher than the audio bandwidth 20Hz to 20kHz and is easily filtered out with a simple LC filter support circuitry be generally grouped into three areas input circuit output power stage and output filter INPUT COMPENSATION The first group is the compensation network and control setting components These resistors and Copyright 2000 Rev 1 2a 2001 11 26 Microsemi Linfinit
11. cs Division 11861 Western Avenue Garden Grove CA 92841 714 898 8121 Fax 714 893 2570 LXE1710 1711 EVALUATION BOARD USER GUIDE PRINTED CIRCUIT BOARD Bottom Layer Top Layer SAR 2 M Microsemi Page 10 eve 1 28 Ae Linfinity Microelectronics Division 11861 Western Avenue Garden Grove CA 92841 714 898 8121 Fax 714 893 2570 LXE1710 1711 EVALUATION BOARD USER GUIDE BILL OF MATERIALS MISCELLANEOUS COMPONENTS Line m Reference Part Description Manufacturer amp Part Case 2 t Item Designators Qty 1 Controller Linfinity LX1710 LX1711 SSOP 28 U1 1 2 N Channel MOSFET Fairchild FDS6612A SO 8 Q2 Q4 2 3 P Channel MOSFET Fairchild FDS4953 SO 8 Q1 Q3 2 4 Printed Circuit Board Linfinity SGE2758 REV X 1 ISI RL622 150K LXE1710 TH Coil cr aft DO5022 153HC _ 1711 SMT 6 Phono Jacks 90 Nickel Plated Wht Mouser 161 4214 TH CN1 1 7 Strip Line Plugs Straight Single Row 100 CA CA S36 24B 44 TH J1 J2 2 8 Shorting Jumpers Open Top Black Mouser 151 8030 TH J1 1 9 Terminal Block 2 pos 5mm Block Master 301 021 1000 TH TB1 TB2 2 CAPACITORS Line wer Reference Part Description Part Description Case t Item Designators Qty Novacap 1206N180J500NT 0 1 Capacitor COG 18pF 50V 596 AV Y A2DOBEABOJATOR 1206 C5 1 1206N151J500NT 0 2 Capacitor 150pF 50V 5
12. in a matter of a few minutes Both the LX1710 and LX1711 operate from a single supply voltage The 1710 evaluation board can accommodate a supply voltage from 7V to 15V which produces 25W into 4Q and greater than 40W into 2Q The LX1711 can handle a higher supply voltage 7V to 25V and provides greater than 50W continuous output power into 4Q The evaluation amplifier board has been designed for a 4Q load The output filter can be easily modified to change frequency response for other load optimization For Information on circuit analysis design tradeoffs and component selection please see Application Note AN 16 AudioMAX design Resource Thank you again for your interest in the new quieter high efficiency Class D Audio Amplifier from Linfinity Microsemi Please let us know what you think and stay tuned for future product releases to our AudioMAX family of products Regards Microsemi Linfinity Division http www microsemi com 714 898 8121 Copyright 2000 Microsemi Page 2 Rev 1 28 2001 11 26 Linfinity Microelectronics Division 11861 Western Avenue Garden Grove CA 92841 714 898 8121 Fax 714 893 2570 LXE1710 1711 EVALUATION BOARD USER GUIDE TABLE OF CONTENTS LX1710 1710 AudioMAX Evaluation Board Features and Circuit lt 4 Input Compensation Output Stage Filter Stage Quick Start Guilde mb oe tte dte tu cs idt 5 Application Schematic 25 o D
13. y Microelectronics Division e Supports Full Audio Bandwidth e Optimized to Drive 40 Speaker Load Terminal Block Connectors for Supply Voltage and Speaker Connection e RCA Plug for Audio Input Signal capacitors set up the controller operating frequency response characteristics and comparator ramp fundamental to Class D operation OUTPUT STAGE The next section is the output stage The controller IC generates a PWM output by controlling external FETs connected in a full bridge configuration The full bridge configuration is connected between the single supply voltage PVDD and ground PGND with the output of the bridge driving the LC filter stage Because the FETs are either fully or fully off Class D topology is extremely efficient up to 85 typical circuit power dissipation is minimal and maximum power is delivered to the speaker The bridge output also drives the RC low pass filter which provides the feedback for the control loop through the FBK inputs FILTER STAGE The single stage second order LC filter is used to remove the switching frequency The frequency response and corner frequency can be easily adjusted for optimization of various loads The LC evaluation board component values have been chosen for a 4 load See section on LC filter design for component selection Page 4 11861 Western Avenue Garden Grove CA 92841 714 898 8121 Fax 714 893 2570 LXE1710 1711 EVALUATION
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