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EV7720DS-00A Scheda tecnica(PDF) 7 Page - Monolithic Power Systems |
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EV7720DS-00A Scheda tecnica(HTML) 7 Page - Monolithic Power Systems |
7 / 7 page EV7720DS-00A – 20W STEREO CLASS D SINGLE ENDED AUDIO AMPLIFIER NOTICE: The information in this document is subject to change without notice. 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. EV7720DS-00A Rev. 1.0 www.MonolithicPower.com 7 10/19/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2007 MPS. All Rights Reserved. QUICK START GUIDE This board is set up from the factory for 24V operation. To use a 12V power supply, adjust the components as specified in Section 3 below. For more information, consult the MP7720 datasheet. 1. Power Requirements a. Power Supply: 24V, 6A maximum b. 0V to 1VRMS (max) audio signal source c. Speaker: 4Ω or 8Ω 2. Setup Conditions for 24V Operation a. Connect the outputs to the external speakers b. Adjust the power supply to 24V before connecting to the evaluation board c. Turn off the power supply d. Connect the power supply to the VDD terminals e. Set the enable switch to the DISABLE position f. Connect the audio input signal source to the amplifier inputs (IN1, IN2) g. Turn on the power supply to apply power to the board 3. 12V Operation Modifications a. Change C11 to 2.2nF and C12 to 1.8nF b. Remove R22, R24 and R113. Change R1 and R2 from 20kΩ to 10kΩ c. Adjust the power supply to 12V (do not turn on) d. Use same procedure for turn on as specified in Section 2 4. Music Turn-On Sequence a. Set the enable switch to the ENABLE position b. Audio should be heard from the speaker(s) 5. Music Turn-Off Sequence a. Set the enable switch to the DISABLE position |
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