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| EV0045 (MP7731) Compact 25W Class D Stereo Bridged Audio Amplifier Monolithic Power Systems EVALUATION BOARD - PRELIMINARY INFORMATION GENERAL DESCRIPTION The EV0045 is a stereo evaluation board featuring MPS' MP7731 Class D Full Bridge Audio Amplifier. The EV0045 can deliver 25W into a 4 load with a 14.5V input supply. The MP7731 is a mono 30W Class D Audio Amplifier. It is one of MPS' second generation of fully integrated audio amplifiers which dramatically reduces solution size by integrating the following: * * * * 180m power MOSFETs Start up / shut down pop elimination Short circuit protection circuits Mute / Standby Mode FEATURES * * * * * * * * * * * * 25W into 4 with 14.5V Input 90% Efficiency at 5W 9.5V to 14.5V Supply Voltage Operation Full Bridge Output Drive Integrated 180m Switches Turn On / Turn Off Click and Pop Suppression Integrated Short Circuit Protection Integrated Thermal shutdown Mute / Standby Mode Notebook and Multimedia Computers Television and Home Theatre Systems DVD and VCR Players APPLICATIONS The MP7731 utilizes a full bridge output structure capable of delivering 30W into 4 speakers. As in all other MPS Class D Audio Amplifiers, this device exhibits the high fidelity of a Class A/B amplifier at efficiencies greater than 90%. EVALUATION BOARD Dimensions (1.9"X x 1.2"Y) Board Number EV0045 MPS IC Number MP7731DF w w .D w t a S a e h , "MPS", "Monolithic Power Systems", and "The Future of Analog IC Technology" are Registered Trademarks of Monolithic Power Systems, Inc. t e U 4 .c m o ABSOLUTE MAXIMUM RATINGS Supply Voltage VIN ....................................... 26V BS Voltage.......................VSW-0.3V to VSW+6.5V Enable Voltage VEN ........................... -0.3V to 6V VSW, VPIN, VNIN .............................. -1V to VDD+1V AGND to PGND ............................. -0.3V to 0.3V Recommended Operating Conditions Input Voltage VDD .......................... 9.5V to 14.5V Signal Input Voltage ..............................1V rms Signal Input Frequency............... 20Hz to 20kHz Signal Source Impedance ..........less than 600 External Enable Input ........................... 0V to 5V Speaker Resistance ............................ 4 to 8 06/04, Rev. 1.3 www.MonolithicPower.com w w w .D a aS t ee h 4U t om .c 1 EV0045 (MP7731) COMPACT 25W CLASS D STEREO BRIDGED AUDIO AMPLIFIER PRELIMINARY INFORMATION Figure 1: EV0045 Stereo Full Bridge Schematic 06/04, Rev. 1.3 www.MonolithicPower.com 2 EV0045 (MP7731) COMPACT 25W CLASS D STEREO BRIDGED AUDIO AMPLIFIER PRELIMINARY INFORMATION Table 1: EV0045 Stereo Full Bridge Bill of Materials Item 1 Qty 4 Ref Des D3 D5 D9 D11 2 5 D1 D6 D7 D12 D13 3 4 D2 D4 D8 D10 4 2 C2 C17 5 4 C6 C9 C21 C24 6 4 C4 C10 C19 C25 7 2 C13 C16 8 4 C1 C14 C15 C28 9 4 C5 C11 C20 C26 10 4 C3 C8 C18 C23 Distributor: Digikey 1uF Ceramic Capacitor, 25V, X7R SM1206 Panasonic ECJ-3YB1E105K PCC1893CT-ND 1uF Ceramic Capacitor, 16V, X5R SM0805 Panasonic ECJ-2FB1C105K PCC2249CT-ND 15pF Ceramic Capacitor, 50V, NPO SM0603 Panasonic ECJ-1VC1H150J PCC150ACVCT-ND 4.7uF Ceramic Capacitor, 16V, X5R SM1206 Panasonic ECJ-3YB1C475M PCC2226CT-ND 2200pF Ceramic Capacitor, 50V, X7R SM0603 Panasonic ECU-V1H222KBV PCC222BVCT-ND 1uF Ceramic Capacitor, 16V, X5R SM0603 Panasonic ECJ-1VB1C105K PCC2224CT-ND 22uF Tantalum Cap., 25V SMD Panasonic ECS-T1E0226R PCS5226CT-ND Zener Diode, 6.2V SOD-323 Diodes Inc BZT52C6V2S-7 BZT52C6V2SDICT-ND Rectifier Diode SOD-323 Diodes Inc 1N4148WS-7 1N4148WSCT-ND Value Description Schottky Diode, 30V, 1A Package SMB Manufacturer IRF Manufacturer Part Number MBRS130LTR Distributor Part Number MBRS130LCT-ND 06/04, Rev. 1.3 www.MonolithicPower.com 3 EV0045 (MP7731) COMPACT 25W CLASS D STEREO BRIDGED AUDIO AMPLIFIER PRELIMINARY INFORMATION Table 1: EV0045 Stereo Full Bridge Bill of Materials (continued) Item 11 Qty 6 Ref Des C7 C12 C22 C27 C29 C30 12 13 1 4 C31 C32 C33 C34 C35 14 2 U1 U2 15 4 L1 L2 L3 L4 16 4 R2 R7 R12 R15 17 2 R3 R13 18 4 R18 R19 R20 R21 19 5 R5 R6 R9 R11 R17 20 4 R1 R8 R10 R16 Distributor: Digikey 169k Ohm Film Resistor, 1% SM0603 Panasonic ERJ-3EKF1693V P169KHCT-ND 100k Ohm Film Resistor, 1% SM0603 Panasonic ERJ-3EKF1003V P100KHCT-ND 10 Ohm Film Resistor, 5% SM0603 Panasonic ERJ-3GEYJ100V P10GCT-ND 10k Ohm Film Resistor, 1% SM0603 Panasonic ERJ-3EKF1002V P10.0KHCT-ND 20k Ohm Film Resistor, 5% SM0805 Panasonic ERJ-6GEYJ203V P20KACT-ND 10uH Inductor/2.6A/0.035 Ohm/8RDY Radial Toko A7040HN-100M Class D Amplifier TSSOP-20 MPS MP7731 10uF 390pF Ceramic Capacitor, 16V, X5R Ceramic Capacitor, 50V, X7R SM1206 SM0603 Panasonic Panasonic ECJ-3YB1C106M PCC2227CT-ND Value 0.47uF Description Ceramic Capacitor, 100V, X7R Package SM1210 Manufacturer Panasonic Manufacturer Part Number ECJ-4YB2A474K Distributor Part Number PCC2240CT-ND ECU-V1H391KBV PCC391BVCT-ND 06/04, Rev. 1.3 www.MonolithicPower.com 4 EV0045 (MP7731) COMPACT 25W CLASS D STEREO BRIDGED AUDIO AMPLIFIER PRELIMINARY INFORMATION Table 1: EV0045 Stereo Full Bridge Bill of Materials (continued) Item 21 Qty 2 Ref Des R4 R14 22 10 TP1TP10 Test Point Square Header Sullins PTC36SAAN S1012-36-ND Value 174k Ohm Description Film Resistor, 1% Package SM0603 Manufacturer Panasonic Manufacturer Part Number ERJ-3EKF1743V Distributor Part Number P174KHCT-ND Distributor: Digikey EVALUATION BOARD OPERATION OUT1+ OUT1VCC GND OUT2+ OUT2- Power Requirements 1. Power supply: 12V 2. 0 -1VRMS (max) audio signal source. 3. Speaker: 4 or 8: Setup Condition for 12V Operation 1. Connect speaker outputs to OUT1+, OUT-, OUT2+, OUT2- respectively. 2. Connect the audio inputs to IN1, GND, IN2 respectively. 3. Adjust the power supply to 12V, (do not turn on) 4. Connect the power supply to the VCC, GND terminals 5. Apply power to the board 6. Audio should be heard from the speaker(s) GND IN1 GND IN2 EN Figure 2: Board Connections 06/04, Rev. 1.3 www.MonolithicPower.com 5 EV0045 (MP7731) COMPACT 25W CLASS D STEREO BRIDGED AUDIO AMPLIFIER PRELIMINARY INFORMATION Figure 3: Top Layer with Silkscreen Overlay Figure 4: Bottom Layer with Silkscreen Overlay NOTICE: MPS believes the information in this document to be accurate and reliable. However, it is subject to change without notice. Contact MPS for current specifications. MPS encourages users of its products to ensure that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS cannot assume any legal responsibility for any said applications. EV0045 (MP7731) Rev. 1.3 6/17/04 (c) 2004 MPS, Inc. Monolithic Power Systems, Inc. 983 University Avenue, Building A, Los Gatos, CA 95032 USA Tel: 408-357-6600 Fax: 408-357-6601 www.MonolithicPower.com 6 |
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