general description the max9713 evaluation kit (ev kit) is a fully assembled and tested printed-circuit board (pcb) that contains the max9713 filterless class d amplifier. the ev kit is capa- ble of delivering 6w into an 8 load and is designed to operate from a 10v to 25v dc power supply. the max9713 ev kit accepts differential or single-ended input signals and provides an option to select between different switching frequencies. features ? 10v to 25v single-supply operation ? up to 85% efficiency ? drives 6w into 8 or 8w into 16 ? differential or single-ended input modes ? pin-selectable frequency options ? pin-selectable gain options ? low 0.1% thd+n ? surface-mount construction ? fully assembled and tested evaluates: max9713 max9713 evaluation kit ________________________________________________________________ maxim integrated products 1 19-3521; rev 2; 11/07 for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. ordering information component list part type MAX9713EVKIT+ ev kit designation qty description c1 1 0.1? ?0%, 25v x5r ceramic capacitor (0402) tdk c1005x5r1e104k c2, c3 2 33? ?0%, 35v tantalum capacitors (d case) avx tajd336k035 c4, c5 2 0.1? ?0%, 25v x7r ceramic capacitors (0603) murata grm188r71e104k tdk c1608x7r1e104k or equivalent c6, c7, c8 3 100pf ?%, 50v c0g ceramic capacitors (0402) murata grp1555c1h101j taiyo yuden umk105cg101jw tdk c1005c0g101j c9, c10, c12 3 0.47? ?0%, 6.3v x5r ceramic capacitors (0402) murata grm155r60j474k tdk c1005x5r0j474k c11 1 0.01? ?0%, 25v x7r ceramic capacitor (0402) murata grp155r71e103k tdk c1005x7r1e103m designation qty description c13 1 1? ?0%, 25v x7r ceramic capacitor (0805) tdk c2012x7r1e105k or equivalent c14 1 1000pf ?0%, 50v x7r ceramic capacitor (0603) murata grm188r71h102k tdk c1608x7r1h102kt c15 0 not installed, ceramic capacitor (0603) c16?22 0 not installed, ceramic capacitors (0402) d1 1 5.1v, 20ma zener diode (sot-23) central cmpz5231b lead free (top mark: c8f) fb1 1 100 ?5%, 1.7a ferrite bead (0603) murata bkp1608hs101-t fb2, fb3 2 1k ?5%, 150ma ferrite beads (0402) murata bk1005hm102-t fout1+, fout1-, fout2+, fout2- 0 not installed, test points ju1?u5 5 3-pin headers ju6, ju7 2 2-pin headers + denotes lead-free and rohs-compliant.
evaluates: max9713 max9713 evaluation kit 2 _______________________________________________________________________________________ quick start recommended equipment before beginning, the following equipment is needed: 15v, 1a power supply audio source (i.e., cd player, cassette player) ? /16 speaker procedure the max9713 ev kit is fully assembled and tested. follow the steps below to verify board operation. caution: do not turn on the power supply until all connections are completed. 1) verify that no shunt is across jumper ju6 (differential input mode). 2) verify shunt across pins 1-2 of jumper ju1. install shunt across jumper ju7 (ev kit is enabled). 3) verify shunts across pins 1-2 of jumpers ju2 and ju3 (gain = 16db). 4) verify shunts across pins 1-2 of jumpers ju4 and ju5 (spread-spectrum mode, frequency centered at 335khz). 5) connect the speaker across the out+ and out- pads. 6) connect the positive terminal of the 15v power sup- ply to the v+ pad and the ground terminal of the power supply to the gnd pad. 7) connect the audio source across the vin+ and vin- pads. 8) turn on the power supply, and then turn on the audio source. detailed description the max9713 ev kit contains the max9713 filterless class d amplifier ic. the ev kit operates from a 10v to 25v dc power supply and accepts a differential or sin- gle-ended audio input source. the single-ended input mode accepts up to 2v p-p signals, and the differential mode accepts up to 4v p-p signals. the audio input source is amplified to drive 6w into an 8 speaker. the max9713 ev kit provides three sets of differential outputs. the device outputs (out+/-) can be connect- ed directly to a speaker load without any filtering. however, a filter can be added to ease evaluation. the filtered outputs (fout1+/-) require installation of filter- ing components t1, c21, and c22. the lcr filtered outputs (fout2+/-) require installation of filtering com- ponents l4, l5, c15?20, r2, and r3. component list (continued) designation qty description l4, l5 0 not installed, power inductors r1 1 10k ?% resistor (0402) r2, r3 0 not installed, resistors (0402) t1 0 not installed, common-mode choke u1 1 32-p i n tqfn- e p *, 5mm x 5m m x 0.8m m maxim max9713etj+ 7 shunts 1 pcb: max9713 evalution kit+ * ep = exposed paddle. supplier phone website avx corp. 843-946-0238 www.avxcorp.com c entr al s em i cond uctor c or p . 631-435-1110 www.centralsemi.com m ur ata m fg . c o., ltd . 770-436-1300 www.murata.com taiyo yuden 800-348-2496 www.t-yuden.com tdk corp. 847-803-6100 w w w .com p onent.td k.com component suppliers note: indicate that you are using the max9713 when contact- ing these component suppliers.
jumper selection shutdown mode jumpers ju1 and ju7 control the shutdown pin ( shdn ) of the max9713. see table 1 for the ju1 and ju7 functions. note: contact your local maxim representative for rec- ommended max9713 filtering component values. gain selection jumpers ju2 and ju3 provide an option to select the output voltage gain. see table 2 for ju2 and ju3 func- tions. see table 5 for power vs. gain and input levels. switching frequency the max9713 has two operating modes, fixed-frequen- cy modulation (ffm) mode and spread-spectrum mod- ulation (ssm) mode. jumpers ju4 and ju5 control pins fs1 and fs2. see table 3 for ju4 and ju5 functions. evaluates: max9713 max9713 evaluation kit _______________________________________________________________________________________ 3 ju1 shunt position ju7 shunt position ev kit function pins 1 and 2 installed ( shdn = high) ev kit enabled (default) pins 2 and 3 installed, without external signal ( shdn = low) shutdown mode pins 1 and 2 not installed, with external signal connected to shdn pad shdn pin driven by external signal. shutdown is active low. table 1. ju1 and ju7 functions ( shdn ) ju2 shunt location ju3 shunt location max9713 output gain (db) pins 1 and 2 (g1 = high) 1-2 (g2 = high) 16 (default) pins 1 and 2 (g1 = high) 2-3 (g2 = low) 13 pins 2 and 3 (g1 = low) 1-2 (g2 = high) 19.1 pins 2 and 3 (g1 = low) 2-3 (g2 = low) 22.1 table 2. ju2 and ju3 functions (g1 and g2) note: make sure a shunt is installed across pins 1-2 of jumper ju1. ju4 shunt location ju5 shunt location max9713 switching frequency (khz) pins 1 and 2 (fs1 = high) 1-2 (fs2 = high) 335 ?0%, ssm (default) pins 1 and 2 (fs1 = high) 2-3 (fs2 = low) 236, ffm pins 2 and 3 (fs1 = low) 1-2 (fs2 = high) 460, ffm pins 2 and 3 (fs1 = low) 2-3 (fs2 = low) 335, ffm table 3. ju4 and ju5 functions (fs1 and fs2) note: make sure a shunt is installed across pins 1-2 of jumper ju1.
evaluates: max9713 max9713 evaluation kit 4 _______________________________________________________________________________________ shunt position ev kit input mode not installed differential input mode (default) installed (vin- pad ac-coupled to gnd) single-ended input mode table 4. ju6 functions gain (db) v in diff rms (v) r l ( ) p out at 10% thd+n (w) 13.0 1.27 16 8 16.1 0.89 16 8 19.1 0.63 16 8 22.1 0.45 16 8 13.0 0.78 8 6 16.1 0.54 8 6 19.1 0.39 8 6 22.1 0.27 8 6 table 5. max9713 power vs. gain and input levels at 10% thd+n input mode jumper ju6 provides an option to select between a differential or single-ended input mode of the ev kit. see table 4 for ju6 functions.
evaluates: max9713 max9713 evaluation kit _______________________________________________________________________________________ 5 ju5 1 2 3 dvdd 1 2 3 ju4 1 2 3 ju3 dvdd dvdd 1 2 3 dvdd ju2 shdn ju7 dvdd c11 0.01 f c10 0.47 f c9 0.47 f c8 100pf fb2 fb3 ju6 c6 100pf c7 100pf vin- gnd vin+ dvdd r1 10k 3 1 d1 1 2 3 ju1 vdd c4 0.1 f 34 12 c5 0.1 f 21 22 23 24 c3 33 f 35v c2 33 f 35v fb1 c14 1000pf v+ gnd out+ 29 30 27 28 3 2 4 1 c21 open c22 open t1 fout1- fout1+ l4 open l5 open c15 open c16 open fout2- c20 open r3 open c18 open fout2+ c19 open r2 open c17 open out- c1 0.1 f vdd c13 1 f c12 0.47 f 32 31 26 25 20 17 8 n.c. n.c. n.c. n.c. n.c. n.c. n.c. 19 18 16 15 14 10 9 11 12 in- in+ reg agnd shdn g1 g2 fs1 fs2 v dd v dd pgnd pgnd v dd v dd pgnd pgnd out+ out+ out- out- c1p c1n chold ss 13 7 5 6 max9713 u1 figure 1. max9713 ev kit schematic
evaluates: max9713 max9713 evaluation kit 6 _______________________________________________________________________________________ figure 2. max9713 ev kit component placement guide component side figure 3. max9713 ev kit pcb?omponent side figure 4. max9713 ev kit pcb?ayer 2 (gnd) figure 5. max9713 ev kit pcb?ayer 3 (vdd)
evaluates: max9713 max9713 evaluation kit _______________________________________________________________________________________ 7 figure 6. max9713 ev kit pcb?older side figure 7. max9713 ev kit component placement guide solder side
maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. 8 _____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 2007 maxim integrated products is a registered trademark of maxim integrated products, inc. evaluates: max9713 max9713 evaluation kit revision history revision number revision date revision description pages changed 0 initial release 1 4/05 2 11/07 update to lead-free and rohs-compliant; various edits; replaced figures 1?. 1?
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