EV7721DF-00A 10W Stereo Class D Single Ended Audio Amplifier EV Board The Future of Analog IC Technology DESCRIPTION FEATURES The EV7721DF-00A is the evaluation board for the MP7721, a stereo 10W Class D Audio Amplifier. It is one of MPS’ productions of fully integrated audio amplifiers which dramatically reduces solution size by integrating the following: 250mΩ power MOSFETs Startup / Shutdown pop elimination Short circuit protection circuits Mute / Standby The MP7721 utilizes a single ended output structure capable of delivering 2x10W into 8Ω speakers. MPS Class D Audio Amplifiers exhibit the high fidelity of a Class A/B amplifier at efficiencies greater than 90%. The circuit is based on the MPS’ AAMTM proprietary variable frequency topology that delivers excellent linearity, fast response time and operates on a single power supply. 10W Output at VDD = 24V into a 8Ω load THD+N = 0.06% at 1W, 8Ω 93% Efficiency at 10W Low Noise (190μV Typical) 9.5V to 24V Operation from a Single Supply Mute/Standby Modes (Sleep) APPLICATIONS Flat Panel and Projection Televisions DVD and Surround Sound Systems Flat Panel Monitors Multimedia Computers Home Stereo Systems “MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic Power Systems, Inc. AAM (Analog Adaptive Modulation) is a Trademark of Monolithic Power Systems, Inc. ELECTRICAL SPECIFICATIONS Parameter Supply Voltage Symbol Value Units VDD 24 V EV7721DF-00A EVALUATION BOARD THD+N (%) 20 10 (L x W x H) 3.5” x 2.4” x 1.2” 8.9cm x 6.1cm x 3.0cm Board Number MPS IC Number EV7721DF-00A MP7721DF EV7721DF-00A Rev. 1.0 10/2/2012 1 0.1 0.01 0.1 1 POUT (W) www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 10 1 EV7721DF-00A Rev. 1.0 10/2/2012 IN2 IN1 2, 3, 4 RCA CN2 2, 3, 4 RCA CN1 NS R17 NS R4 2.2 F/50V C14 2.2 F/50V C9 10k R11 10k R7 NS C13 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. GND VDD GND 1 2 10k R19 2.7nF C15 3.3nF C6 R3 100k R18 100k NS VCC R2 100k R13 R9 10k 100k C25 EN CN3 C21 10 F/50V VCC EN 10 F/50V C4 VCC 2200 F/35V C27 VCC VCC EN2 AGND2 NS C2 NS C24 FB2 NC BS2 VDD2 SW2 IN2 REF2 PGND2 NC BS1 EN1 NC VDD1 SW1 PGND1 AGND1 IN1 REF1 NC MP7721 VCC FB1 D6 R16 6.2V D5 20k R10 17K R24 VCC 17K R23 R21 100K MBRS130T3 D4 390pF C11 10 R5 3.61A L2 3.61A L1 5 4 3 TP1 ENABLE DISABLE/EXT EN. ENABLE SWITCH 6 499K R22 EXT. ENABLE 2 10k R12 10k R6 1 SW1 22pF C26 390pF C19 10 R15 MBRS130T3 D8 MBRS130T3 D1 MBRS130T3 D7 C1 22pF For VDD=12V, R24 NO STUFF 120K R20 IN4148 20k D3 IN4148 6.2V D2 100 F/ 35V 120K R1 EN 0.47 F/50V C18 0.47 F/50V C10 C16 C7 C20 10 R14 C12 10 R8 2 1 3 4 OUT1 SP1:A OUT2 SP1:B EV7721DF-00A – 10W STEREO CLASS D SINGLE ENDED AUDIO AMPLIFIER EV BOARD EVALUATION BOARD SCHEMATIC 2 EV7721DF-00A – 10W STEREO CLASS D SINGLE ENDED AUDIO AMPLIFIER EV BOARD EV7721DF-00A BILL OF MATERIALS Qty Ref Value Description Package Manufacturer 2 22pF Ceramic Cap., 50V, C0G 2 C1, C26 C2, C13, C24, C25 C3, C23 0603 muRata 100μF Electrolytic Cap., 35V Radial Rubycon 2 C4, C21 10μF Electrolytic Cap., 50V Radial Rubycon 2 C5, C22 1μF Ceramic Cap., 25V, X7R 1206 TDK C3216X7R1H105K 1 C6 3.3nF Ceramic Cap., 50V, X7R 0603 TDK C1608X7R1H332K 2 C7, C16 1μF Electrolytic Cap., 25V Radial Rubycon 2 C8, C17 0.47μF Ceramic Cap., 25V, X7R 0805 muRata 2 C9, C14 2.2μF Electrolytic Cap., 50V Radial Rubycon 2 C10, C18 0.47μF FILM, 50V Radial Any 2 C11, C19 390pF Ceramic Cap., 50V, C0G 0603 muRata GRM1885C1H391JA01D 2 C12, C20 0.1μF Ceramic Cap., 50V, X7R 1206 muRata GMR21BR71H104KA01L 1 C15 2.7nF Ceramic Cap., 50V, X7R 0603 TDK 1 C27 2200μF Electrolytic Cap., 35V Radial Rubycon 2 R10, R16 20kΩ Film Res., 1% 0603 Yageo RC0603FR-0720KL 2 R23, R24 17kΩ Film Res., 1% 0603 Yageo RC0603FR-0716K9L 1 R22 499kΩ Film Res., 1% 0603 Yageo RC0603FR-07499KL 2 10Ω Film Res., 1% 0603 Yageo RC0603FR-0710RL 10kΩ Film Res., 1% 0603 100kΩ Film Res., 1% 0805 Yageo 9C08052A1003FKHFT 2 R5, R15 R6, R7, R9, R11, R12, R19 R2, R3, R13, R18, R21 R1, R20 120kΩ Film Res., 1% 0805 Yageo 9C08052A1203FKHFT 2 R4, R17 NS Not Stuffed 2 R8, R14 D1, D4, D7, D8 10Ω Film Res., 1% 1206 Yageo 9C12063A10R0FKHFT Diode Schottky, 30V, 1A SMB Diodes Inc B130B SOD-323 Diodes Inc 1N4148WS-7-f SOD-123 Diodes Inc BZT52C6V2 4 6 5 4 NS MBRS130T3 2 D3, D6 1N4148 2 D2, D5 6.2V EV7721DF-00A Rev. 1.0 10/2/2012 Part Number GRM1885C1H220JA01D Not Stuffed Diode Switch, 75V, 200mW Diode Zener, 500mW GRM21BR71E474KA01L C1608X7R1H272K RC0603FR-0710KL www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 3 EV7721DF-00A – 10W STEREO CLASS D SINGLE ENDED AUDIO AMPLIFIER EV BOARD EV7721DF-00A BILL OF MATERIALS (continued) Qty Ref 2 FB1, FB2 2 L1, L2 1 SP1 1 SW1 1 TP1 1 CN3 2 CN1, CN2 1 U1 EV7721DF-00A Rev. 1.0 10/2/2012 Value 10μH Description Package Manufacturer Part Number Ferrite Bead, 6A 1206 Steward Inductor, 3.61A Radial Toko 13RHBP-A7502HY-100M TSSOP20F MPS MP7721DF HI1206T500R-10 Speaker Connector DPDT Slide Switch 12V .1A Test Point/EXT.EN Banana Jack Connector Phono Jack, Female Class-D Audio Amplifier www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 4 EV7721DF-00A – 10W STEREO CLASS D SINGLE ENDED AUDIO AMPLIFIER EV BOARD PRINTED CIRCUIT BOARD LAYOUT Figure 1—Top Silk Layer Figure 2—Top Layer Figure 3—Bottom Silk Layer Figure 4—Bottom Layer EV7721DF-00A Rev. 1.0 10/2/2012 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 5 EV7721DF-00A – 10W STEREO CLASS D SINGLE ENDED AUDIO AMPLIFIER EV BOARD QUICK START GUIDE This board set up from the factory for 24V operation. To use with a 12V power supply, adjust the components as specified in the 12V Operation Modifications section below. For more information, consult the MP7721 datasheet. Figure 5—EV7721DF-00A Connection Diagram 1. Power Requirements a. Power supply: 9.5V to 24V, 3A maximum. b. 0V to 1VRMS (max) audio signal source. c. Speaker: 8Ω. 2. Setup Condition for 24V Operation a. Adjust the power supply to 24V (do not turn on). b. Connect the outputs to the external speakers. c. Connect the power supply to the VDD terminals. d. Set the enable switch to the DISABLE position. e. Connect the audio input signal source to the amplifier inputs (IN1, IN2). f. Turn on the power supply to apply power to the board. 3. 12V Operation Modifications a. Change C6 to 2.2nF and C15 to 1.8nF components. b. Remove R24 from the demo board. c. Adjust the power supply to 12V (do not turn on). d. Do as step b~f specified in Section 2. 4. Music Turn-On Sequence a. Set the enable switch to the ENABLE position. 5. Music Turn-Off Sequence a. Set the enable switch to the DISABLE position. b. Turn off power supply. NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. EV7721DF-00A Rev. 1.0 10/2/2012 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2012 MPS. All Rights Reserved. 6