LX1722SM EVALUATION BOARD USER’S GUIDE LX1722SM AUDIOMAX EVALUATION KIT USER’S GUIDE ® TM Copyright © 2000 Rev. 0.1, 2004-09-30 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 1 LX1722SM EVALUATION BOARD USER’S GUIDE LX1722SM Evaluation Board Quick Start Guide The LX1722SM Evaluation Board is a fully functional stereo class-D amplifier. Connection to a single power supply, two speakers, and an audio source is all that is required to begin evaluating the amplifier. The amplifier will support continuous output power levels up to >60W x 2 into 4 ohm load (<1% THD+N), using small outline Surface Mount type MOSFETs. Board Setting 1. Power and Ground Connections: The terminal JP1 is for the power supply connection. Vcc is connected to the positive polarity of the power supply or battery (+7V ~ +25V); the GND is connected to the negative polarity of the power supply or battery. Please make sure your power supply polarity connection and supply voltage is correct before you start to evaluate the board. 2. Speakers Connections: JP5 and JP6 are the speaker outputs. JP5 is for the left channel (CH1) and JP6 is for the right channel (CH2). Connect speaker “+” and “-“ to “LOUT+/ROUT+” and “LOUT-/ROUT-“ of JP5/JP6. This evaluation board is designed for standard 4 ohm speaker loads. For different impedance speakers, the output filter values should be modified to optimize the output frequency response. Please see AudioMAX Design Resource (AN-16) for LC filter values. 3. Audio Input Connections: JP2, JP2A, RCA1 and RCA2 are the audio input connections. JP2/JP2A support differential audio inputs, and RCA1/RCA2 are for the single-ended audio inputs. When audio inputs are differential, the positive audio inputs are connected to LIN+/RIN+ pin, while the negative inputs are connected to LIN-/RIN- pin of the JP2/JP2A terminals. J1 and J2 jumpers are left open when using differential inputs. When audio inputs are single-ended, the inputs audio source can either be connected to terminal JP2/JP2A, or to RCA1/RCA2. In this single-ended connection, jumpers J1 and J2 must be closed so that the LIN-/RIN- audio inputs are connected to Ground. 4. SLEEP/MUTE Connections: JP4 is the jumper selection for ON/OFF of SLEEP and MUTE functions. To enable the amplifier, both jumpers should be set to “OFF” (SLEEP is OFF, and MUTE is OFF). 5. Pre-amp Output Connections: JP3 is the header for stereo, single-ended pre-amp outputs, “LPREOUT – GND – RPREOUT”. These outputs are provided to drive other crossover networks or to support additional power amplifiers such as for a Subwoofer speaker system. Copyright © 2000 Rev. 0.1, 2004-09-30 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 2 LX1722SM EVALUATION BOARD USER’S GUIDE APPLICATION SCHEMATIC LISN R16 LFBK+ JP1 Vcc Vcc 2 1 Vcc PGND + Teminal 2 C1 1000uF/25V 1.43K 1% Q1B Si7501DN C2 0.1uF/25V PGND Keep this trace as short as possible, directly from R6 Vcc 1 LPWM+ LOUT+ LISN R6 0.020/1W G1 chassis_gnd 1 FERRITE/SM L1 pin Vcc L100 C25 4.7nF 15uH pgnd Q1A Si7501DN R20 15/1W C29 0.68uF/50V C35 0.1uF/25V JP5 Cpwm Clock 100pF 2 3 C9 22pF R5 4 49.9k 1% GND 5 R2 56.2k 1% C10 6 100pF 7 + 2 C13 8 1uF/10V,TANT J1 JUMPER 1 9 2 C8 0.1uF/25V 10 C3 JP2 HEADER 2 1 2 0.47uF LIN+ 11 LIN- 12 C4 C5 LIN1 2 RIN+ RIN- 13 0.47uF 0.47uF RIN+ 14 RIN- 15 C6 LPREOUT 0.47uF 16 RPREOUT 17 18 2 19 J2 JUMPER 1 20 2 R4 C12 56.2k 1% 100pF 21 22 LFBK- CPWM LFBK+ Q2B Si7501DN RPWM LISN CN LEAIN PVDD VREF PGND CLOCK LN+ GND LP+ V25 LPLNRNRP- RIN+ RP+ RIN- RN+ RAMPOUT PGND SLEEP CP STATUS PVDD _RMUTE NC REAIN RISN REAOUT RFBK+ RFAOUT RFBK- PGND 42 VDD LAMPOUT C36 0.1uF/25V L2 LEAOUT LIN- C31 0.47uF/50V 43 _LMUTE LIN+ C30 0.68uF/50V 44 41 C17 LPWM- LOUT- 4.7uF/25V,TANT 15uH Vcc 40 Q2A Si7501DN C18 + 47uF/25V 39 C19 0.1uF/25V 38 37 LN+ 36 LP+ 35 LP- 34 LN- 33 RN- 32 RP- 31 RP+ 30 RN+ PGND LFBK- 1.43K 1% C26 4.7nF 1. Star connection is expected for PGND; 2. PGND and GND plate is expected, they are devided by the center of LX1722 3. Red havey line means needing heavy duty trace or copper short as posible. 4. LPWM+,LPWM-,RPWM+,RPWM- MUST BE KEPT AS SHORT AS POSSIBLE. R18 5. Chassis GND circles the whole board on bothe top layer and bottom layer. RFBK- 1.43K 1% Q3B Si7501DN PGND 29 C20 R17 These traces keep as C27 4.7nF 4.7uF/25V,TANT 28 + JP2A HEADER 2 RCA2 RCA JACK 1 LFAOUT + 1 RCA1 RCA JACK 1 Vcc 10k C7 1 2 chassis_gnd Teminal 2 U1 R1 PGND 27 C22 26 L3 C21 47uF/25V RPWM- ROUT- + 1 2 HEADER 2 LIN+ Cn Cn JP7 LFBKLFBK+ 0.1uF/25V 15uH Vcc 25 Q3A Si7501DN 24 R21 15/1W C32 0.68uF/50V C37 0.1uF/25V 23 JP6 C11 22pF R3 PGND LX1722CDB 10k 1 2 chassis_gnd 1 2 3 Teminal 2 Q4B Si7501DN C33 0.68uF/50V C34 0.47uF/50V C38 0.1uF/25V Cn RPREOUT RFBK+ RFBK- Vcc LPREOUT GND JP3 HEADER 3 L4 Keep this trace as short as RPWM+ possible, directly from R7 ROUT+ pin Vcc 15uH SLEEP _MUTE Vcc R22 10k Q4A Si7501DN R7 0.020/1W R23 10k R19 RFBK+ RISN 1.43K 1% RISN JP4 ON SLEEP OFF 1 3 5 C28 4.7nF 2 4 6 HEADER 3X2 GND ON MUTE OFF GND PGND Figure 1 - LX1722SM Schematic Copyright © 2000 Rev. 0.1, 2004-09-30 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 3 LX1722SM EVALUATION BOARD USER’S GUIDE LX1722 BLOCK DIAGRAM 17 SLEEP VDD 41 7 PVDD LISN 42 CLOCK 8 RPWM 3 CPWM 2 + 220mV - SYNC OSC UVLO & REFERENCE 10 V25 5V Reference 5 LEAIN 6 40 CN CLK 27,39 PVDD 5V Reference CURRENT SENSE LEAOUT VREF 28 CP 36 LP+ FAULT TIMER OUTPUT DRIVERS & LOGIC ERROR AMP LAMPOUT 13 CLK LIN- 12 S Q R Q 37 LN+ 34 LN35 LP- 1 MUTE LIN+ 11 LFAOUT MUX INPUT AMP 44 LFBK- MUTE 43 LFBK+ 2.5V FEEDBACK AMP LMUTE 4 2.5V Figure 2 – LX1722 Block Diagarm Copyright © 2000 Rev. 0.1, 2004-09-30 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 4 LX1722SM EVALUATION BOARD USER’S GUIDE BILL OF MATERIALS MISCELLANEOUS COMPONENTS Line Item Part Description 1 2 3 4 5 6 7 8 9 10 11 IC, Controller IC, P/N – Channel MOSFET Ferrite Bead Inductor, 15uH Phono Jack, 90° Nickel Plated, White Phono Jack, 90° Nickel Plated, Red Header, Str. .100” Center, 2Pos Header, Str. .100” Center, 3Pos Header, Double Row .100” Center, 6Pos Shorting Jumpers, Open Top, Black Terminal Block 2Pos 5mm Manufacturer & Part # MICROSEMI LX1722CDB VISHAY Si7501DN MURATA BLM41P102SGPT ABRACON AIMT-103-15µH MOUSER 161-4214 MOUSER 161-4214 ANY 87220-2 ANY 87220-3 ANY 1/87215-2 MOUSER 151-8030 BLOCK MASTER 301-021-1000 Reference Designators Qty U1 Q1, Q2, Q3, Q4 L100 L1, L2, L3, L4 RCA1 RCA2 J1, J2, JP2, JP2A, JP7 JP3 JP4 J1, J2 JP1, JP5, JP6 1 4 1 4 1 1 5 1 1 2 3 Case Reference Designators Qty 0805 C9, C11 2 0805 C7, C10, C12 3 0805 C2, C8, C19, C22, C35, C36, C37, C38 8 0805 C25, C26, C27, C28 4 3216 C13 1 C17, C20 2 Case QSOP 44 1212-8 1206 TH TH TH TH TH TH TH TH CAPACITORS Line Item Part Description 1 Capacitor, 22pF, 50V, 5% 2 Capacitor, 100pF, 50V, 5% 3 Capacitor, 100nF, 50V, 20% 4 Capacitor, 4700pF, 50V, 5% 5 Capacitor, Tant 1µF, 16V, 20% 6 Capacitor, Tant 4.7µF, 25V Manufacturer & Part # NOVACAP 0805N220J500NT AVX 08055C220JAT2A NOVACAP 0805N101J500NT AVX 08055C101JAT2A AVX 08055C104MAT2A NOVACAP 0805B104M500NT SAMSUNG CL21B104MBNC CALCHIP GMC21CG472J50NT KEMET T491A105M016AS AVX TAJA105M016R KEMET T491A475M016AS AVX TAJA475M016R 3216 7 Capacitor, 0.47µF, 50V, 5% PANASONIC ECQ-V1H474JL TH 8 9 Capacitor, 0.68µF, 50V Capacitor, 2200µF, 25V, 20% PANASONIC ECQ-V1H684JL PANASONIC EEU-FC1E222 TH TH C3, C4, C5, C6, C31, C34 C29, C30, C32, C33 C1, C21 6 4 2 RESISTORS Line Item Part Description 1 2 3 4 Resistor, 10K, 5%, 1/8W Resistor, 1.21K, 1%, 1/8W Resistor, 49.9K, 1%, 1/8W Resistor, 56.2K, 1%, 1/8W 5 Resistor 15 Ohm, 5%, 1W 6 Resistor, 0.01 Ohm, 1W, 5% Copyright © 2000 Rev. 0.1, 2004-09-30 Manufacturer & Part # ASJ ASJ ASJ ASJ KOA ROHM VISHAY CR21J103T CR21F1211T CR21F4992T CR21F5622T RM73B3A150J MCR100JZHJ150 WSL2512R010FRE4 Case Reference Designators Qty 0805 0805 0805 0805 R1, R3, R22, R23 R16, R17, R18, R19 R5 R2, R4 4 4 1 2 2512 R20, R21 2 2512 R6, R7 2 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 5 LX1722SM EVALUATION BOARD USER’S GUIDE BOARD LAYOUT 4400mil X4 X3 1 L R16 C25 7 PJ R 2 0 L RCA IN 1 A C R C lo ck R1 R2 C 3 C p w m Q 1 R 5 C 2 9 6 2 C 7 1 C INL+ J1 INLLpreout AGND R preout 2995mil JP 3 7 1 R C 7 G1 C 3 1 C9 JP2 C13 M ic ro s e m i C o rp . L X E 1 7 2 2 S M A U D IO M A X JP 1 C18 D N G 1 C 2 C C 2 1 C11 C12 R4 R3 JP2A L100 6 R 9 1 C C 2 2 J INR+ 2 C36 Q 2 C8 INR- + T U O L T U O L C 2 3 L 0 C 4 C10 C35 JP 5 c c V R 7 U1 R 2 1 R 2 2 C 6 C 5 2 A C R R RCA IN 8 1 R F F O p e le -S N O 7 2 C 4 L JP 6 Q4 O R C38 R19 R23 1 X- E1430 GS T U O R + T U 3 L 0 2 C F F O te u -M 4 N O JP C37 C 3 2 Q3 C28 C 3 3 C 3 4 X1 X2 * FR-4 Material * 1 oz copper/ea layer after plating * Green Solder Mask over Copper * 0.062 thickness * Tolerance for hole is +/- 0.003 Plated & unplated * Tolerance for dimension is +/- 0.008 unless otherwise specified Figure 3 - Components Layer Layout Copyright © 2000 Rev. 0.1, 2004-09-30 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 6 LX1722SM EVALUATION BOARD USER’S GUIDE ABSOLUTE MAXIMUM RATINGS Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C ≤ TA ≤ 70°C Parameter Symbol Supply Voltage Supply Current Quiescent Current VCC IDD IQ Test Conditions Min 7 VCC=25V VCC=25V, Output Open Max 25 6 200 Sleep, Status VCC = 25V -0.3 RPWM,CPWM, Mute VCC = 25V -0.3 LIN+, LIN-, RIN+, RIN- VIN VCC = 25V -0.3 LPREOUT, RPREOUT VPRE VCC = 25V -0.3 Clock Frequency FOSC VCC = 25V 250 Copyright © 2000 Rev. 0.1, 2004-09-30 LX1722 Typ Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 330 VCC + 0.3 VCC + 0.3 VCC +0.3 VCC +0.3 500 Units V A mA V V V V KHz Page 7 LX1722SM EVALUATION BOARD USER’S GUIDE GRAPHS 100 50 dx=-64.74 W dy=-0.86617 % PVDD=25V, F=1 KHz 10~22 KHz BPF, 4ohm 10 1 0.9543 % 0.1 0.08813 0.01 0.001 100m 200m 500m 1.037 1 2 5 10 20 5065.78 100 W Figure 4 – THD+N vs. Power GRAPHS 100 50 dx=-5.3228 kHz dy=-0.23101 % PVDD=25V, Po=1 W 10~22 KHz BPF, 4ohm 10 1 % 0.32051 0.1 0.0895 0.01 0.001 20 50 100 200 500 1.00225k 1k 2k 6.325k10k 20k 5k Hz Figure 5 – THD+N vs. Frequency Copyright © 2000 Rev. 0.1, 2004-09-30 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 8 LX1722SM EVALUATION BOARD USER’S GUIDE GRAPHS +10 +8 dx=-17.869 kHz dy=-1.088 dB PVDD=25V, Po=1 W 10~30 KHz BPF, 4ohm +6 +4 +2 d B r +0 -0.473 -1.561-2 -4 -6 -8 -10 10 18.2 20 50 100 200 500 1k 2k 5k 17.8875k 10k 20k 80k Hz Figure 6 – Frequency Response GRAPHS dx=-.99041 kHz dy=+70.191 dB +0 PVDD=25V, Po=1 V = 0dB -1.023 10~22 KHz BPF, 4ohm A-weighted and non A-weighted -20 -40 d B r -60 -71.214 -80 -100 -120 20 50 100 200 500 .973932k 1k 1.96434k 2k 5k 10k 20k Hz Figure 7 – High Frequency Harmonic Distribution and Noise Floor Copyright © 2000 Rev. 0.1, 2004-09-30 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 9 LX1722SM EVALUATION BOARD USER’S GUIDE BOARD LAYERS Figure 8 – LX1722SM EVAL KIT Solder Mask Figure 9 – LX1722SM EVAL KIT Silk Screen Copyright © 2000 Rev. 0.1, 2004-09-30 Microsemi Linfinity Microelectronics Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 Page 10