ev7731df-00a 30w class d mono bridged audio amplifier ev7731df-00a rev. 1.0 www.monolithicpower.com 1 3/31/2010 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. the future of analog ic technology tm tm description the ev7731df-00a is the evaluation board for the MP7731, a mono, 30w class d audio amplifier. it is one of mps? products of fully integrated audio amplifiers which dramatically reduce solution size by integrating the following: start up / shut down pop elimination short circuit protection circuits 180m ? power mosfets mute / standby mode 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 ab amplifier with an efficiency of 90%. the circuit is based on the mps? proprietary variable frequency topology analog adaptive modulation that delivers excellent linearity, fast response time and operates on a single power supply. features ? 30w into 4 ? with v dd = 16.5v ? 93% efficiency at 19w with vdd=16.5v, 8 ? load ? low thd+n (0.1% at 1w, 8 ? , 1khz) ? 9.5v to 18v supply voltage operation applications ? flat panel lcd and pdp displays ? notebook and multimedia computers ? televisions ? home stereos ? dvd and vcd players ? game devices and systems ? monitors ?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. ev7731df-00a evaluation board dimensions (2.2?x x1.7?y x 0.8?z) board number mps ic number ev7731df-00a MP7731 50 20 10 5 2 1 0.5 0.2 0.1 0.05 0.02 0.01 thd+n (%) 0.1 10 50 1 output power (w) MP7731-tac-g01 thd+n vs output power v dd =16.5v r l =8 r l =4 f=1khz
ev7731df- 00a ? 30w class d mono bridged audio amplifier ev7731df-00a rev. 1.0 www.monolithicpower.com 2 3/31/2010 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. tm evaluation board schematic
ev7731df- 00a ? 30w class d mono bridged audio amplifier ev7731df-00a rev. 1.0 www.monolithicpower.com 3 3/31/2010 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. tm ev7731df-00a bill of materials qty ref value description package manufacturer manufacturer p/n 2 c3,c21 470uf electrolytic capacitor, 25v radial jh cd287-25v470 4 c7,c12, c25,c30 2.2uf electrolytic capacitor, 50v radial rubycon 1 c10 1.5nf ceramic capacitor, 50v,x7r 0603 murata grm188r71h152ka01 1 c28 1nf ceramic capacitor, 50v,x7r 0603 murata grm188r71h102ka01d 4 c5,c11, c23,c29 1uf ceramic capacitor, 25v,x7r 1206 murata grm31mr71e105ka01 4 c8,c13, c26,c31 1uf ceramic capacitor, 50v,x7r 0805 murata grm21br71h105ka12l 4 c6,c14, c24,c32 2pf ceramic capacitor, 50v,cog 0603 tdk c1608cog1h020ct 4 c4,c15,c 22,c33 15pf ceramic capacitor, 50v,cog 0603 tdk c1608cog1h150j 4 c36,c37, c38,c39 390pf ceramic capacitor, 50v,cog 0603 murata grm1885c1h391ja01d 4 c41,c42, c43,c44 0.1uf ceramic capacitor, 50v,x7r 0603 murata grm188r71h104ka93d 1 c18 0.47uf ceramic capacitor, 16v,x7r 0603 murata grm188r71c474ka88d 6 c2,c17, c20,c35, c9,c27 0.47uf film,50v radial any 4 d3, d6, d11, d14 diode schottky, 30v, 1a smb ir mbrs130ltr 4 d4, d7, d12, d15 zener diode, 6.2v sod-323 diodes inc bzt52c6v2s-7 4 d2, d5, d10, d13 diode, 40v sod-123 diodes inc 1n5819hw 4 d1, d8, d9, d16 diode, 75v sod-323 diodes inc 1n4148ws-7 2 fb1, fb2 ferrite bead, 6a 1206 lion pb321611-320 1 cn1 6-pins sip header, 0.1" any 4 l1, l2, l3,l4 10uh inductor, 3.6a radial toko 8rdy-a7040hn-100m 4 r5,r16, r34,r35 1k film resistor, 1% 0603 yageo rc0603fr-071kl 6 r4,r6, r15,r17, r22,r24 10k film resistor, 1% 0603 yageo rc0603fr-0710kl 5 r1,r8, r11,r19, r25 100k film resistor, 1% 0603 yageo rc0603fr-07100kl 4 r3,r7, r14,r18 20k film resistor, 1% 0603 yageo rc0603fr-0720kl
ev7731df- 00a ? 30w class d mono bridged audio amplifier ev7731df-00a rev. 1.0 www.monolithicpower.com 4 3/31/2010 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. tm ev7731df-00a bill of materials (continued) qty ref value description package manufacturer manufacturer p/n 1 r13 499k film resistor, 1% 0603 yageo rc0603fr-07499kl 1 r26 20.5k film resistor , 1% 0603 yageo rc0603fr-0720k5l 4 r10,r27, r28,r29 10 film resistor, 5% 1206 yageo rc1206jr-0710r 4 r21,r23, r30,r31 10 film resistor, 1% 0603 yageo rc0603fr-0710rl 2 u1,u2 class d audio amplifier tssop-20 mps MP7731df
ev7731df- 00a ? 30w class d mono bridged audio amplifier ev7731df-00a rev. 1.0 www.monolithicpower.com 5 3/31/2010 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. tm printed circuit board layout figure 1?top silk layer figure 2?top layer figure 3?bottom silk layer figure 4?bottom layer
ev7731df- 00a ? 30w class d mono bridged audio amplifier notice: the information in this document is subject to change wi thout notice. please contact m ps for current specifications. users should warrant and guarantee that third party intellectual property rights ar e not infringed upon when integrating mps products into any application. mps will not assume any legal responsibility for any said applications. ev7731df-00a rev. 1.0 www.monolithicpower.com 6 3/31/2010 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2010 mps. all rights reserved. tm quick start guide power requirements 1. power supply: 9.5v to 18v. 2. 0 -1v rms (max) audio signal source. 3. speaker: 4 ? or 8 ? . setup condition for 12v operation 4. connect speaker outputs to out1+, out1-, out2+, out2- respectively. 5. connect the audio inputs to in1, gnd, in2 respectively. 6. adjust the power supply to 12v, (do not turn on). 7. connect the power supply to the vcc, gnd terminals. 8. apply power to the board. 9. audio should be heard from the speaker(s).
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