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general description the max1567 evaluation kit (ev kit) is a fully assembledand tested printed-circuit board (pcb) that accepts 2.8v to 4.2v input voltages and provides all the output voltages required for a typical digital still camera. the out- puts consist of the main step-down output (3.3v), a step- down output (1.8v), a general-purpose 5v output, outputs for driving white led backlighting, and outputs for charge-coupled device (ccd) and lcd bias. the ev kit comes with the max1567 installed, but can also be used to evaluate the max1566. for applications with a lower battery voltage, such as 2-aa battery applications, ano- ther version of the ev kit is available with the main output configured as a step-up converter (max1567sumevkit). features ? up to 95% efficient ? 2.8v to 4.2v input-voltage range ? main step-down output, 3.3v ? step-down output, 1.8v ? 5v general-purpose output ? ccd and lcd bias outputs (+15v/-7.5v) ? current-regulated output with overvoltageprotection for white led backlighting ? 1 a shutdown mode ? fully assembled and tested evaluates: max1566/max1567 max1567 evaluation kit ________________________________________________________________ maxim integrated products 1 19-3342; rev 1; 4/07 component list for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com. ordering information part temp range ic package MAX1567EVKIT+ 0 c to +70 c* 40 thin qfn(6mm x 6mm) designation qty description c1, c18 2 1? 10%, 25v x7r ceramic capacitors (1206)tdk c3216x7r1e105k taiyo yuden tmk316bj105kl or equivalent c2 1 0.1? 10%, 16v x7r ceramic capacitor (0603)tdk c1608x7r1c104k taiyo yuden emk107bj104ka or equivalent c3 1 100pf 5%, 50v c0g ceramic capacitor (0603)tdk c1608c0g1h101j or equivalent c4 1 6800pf 10%, 25v x7r ceramic capacitor (0402)tdk c1005x7r1e682k taiyo yuden tmk105bj682kv or equivalent c5, c7 2 3300pf 10%, 50v x7r ceramic capacitors (0402)tdk c1005x7r1h332k taiyo yuden umk105bj332kv or equivalent designation qty description c6, c9 2 0.01? 10%, 25v x7r ceramic capacitors (0402)tdk c1005x7r1e103k taiyo yuden tmk105bj103kv or equivalent c8 1 2200pf 10%, 50v x7r ceramic capacitor (0402)tdk c1005x7r1h222k taiyo yuden umk105bj222kv or equivalent c10 1 47? 20%, 6.3v x5r ceramic capacitor (1812)taiyo yuden jmk432bj476mm or equivalent c11 0 not installed, capacitor (0805) c12, c14 2 22? 20%, 6.3v x5r ceramic capacitors (1210)taiyo yuden jmk325bj226mm tdk c3225x5r0j226m c13, c15, c16 3 10? 20%, 6.3v x5r ceramic capacitors (0805)taiyo yuden jmk212bj106mg tdk c2012x5r0j106m or equivalent + denotes a lead-free and rohs-compliant ev kit. *this limited temperature range applies to the ev kit pcb only.the max1567 ic temperature range is -40? to +85?. downloaded from: http:///
evaluates: max1566/max1567 max1567 evaluation kit 2 _______________________________________________________________________________________ component list (continued) designation qty description c17 1 4.7? 20%, 10v x5r ceramic capacitor (0805)tdk c2012x5r1a475m or equivalent c19 0 not installed, ceramic capacitor c20 0 not installed, ceramic capacitor d1, d6, d7, d10 4 s chottky d iod es, 20v , 500m a ( s od - 123) central cmhsh5-2l d2?5 4 white ledsnichia nscw215 d8, d9 0 not installed, diodes (sod-123) d11 1 schottky diode, 2a, 30v (sma)nihon ec21qs03l ju1?u6 6 3-pin headers ju7, ju9, ju10, ju13, ju15 0 not installed, jumperscut here?hort ju8, ju11, ju12, ju14 0 not installed, jumperscut here?pen l1, l2 2 4.7? inductorssumida cdrh2d18-4r7nc l3 1 22? i nd uctor toko #a921c y - 220m ( d 63lc b fam i l y) l4 1 10? inductorsumida cdrh8d28np-100nc l5 1 10? inductorsumida cdrh5d28np-100nc l6 1 22? inductorsumida cdrh5d28np-220nc l7 0 not installed, inductor designation qty description n1, n2 2 n-channel mosfets (sot23) fairchild fdn361an_nl n3 0 not installed, n-channel mosfet(sot23) p1 1 p-channel mosfet (sot23)fairchild fdn360p_nl r1 1 1.1m 5% resistor (0603) r2, r12, r14, r16, r18, r20 6 90.9k 1% resistors (0603) r3 1 10 5% resistor (0603) r4, r5 2 51k 5% resistors (0603) r6 1 33k 5% resistor (0603) r7 1 22k 5% resistor (0603) r8 1 60.4k 1% resistor (0603) r9, r22, r23 3 100k 5% resistors (0603) r10 1 16.2k 5% resistor (0603) r11, r21 2 1m 1% resistors (0603) r13 1 549k 1% resistor (0603) r15 1 274k 1% resistor (0603) r17 1 150k 1% resistor (0603) r19 1 40.2k 1% resistor (0603) r24?29 0 not installed, resistors (1206) r30, r31 0 not installed, resistors (0603) t1 0 not installed, transformer u1 1 max1567etl+ (40-pin thin qfn6mm x 6mm) 6 shunts, 2 position 1 pcb: max1567 evaluation kit+ component suppliers supplier phone website centralsemiconductor 631-435-1110 www.centralsemi.com fairchildsemiconductor 888-522-5372 www.fairchildsemi.com internationalrectifier 310-322-3331 www.irf.com kamaya, inc. 260-489-1533 www.kamaya.com murata mfg.co., ltd. 770-436-1300 www.murata.com note: indicate that you are using the max1567 when contacting these component suppliers . supplier phone website panasoniccorp. 800-344-2112 www.panasonic.com sumida corp. 847-545-6700 www.sumida.com taiyo yuden 800-348-2496 www.t-yuden.com tdk corp. 847-803-6100 www.component.tdk.com toko 847-297-0070 www.toko.com vishay 402-564-3131 www.vishay.com downloaded from: http:///
evaluates: max1566/max1567 max1567 evaluation kit _______________________________________________________________________________________ 3 quick start recommended equipment power supply capable of supplying 2.8v to 4.2v at 2a voltmeter load resistors or electronic loads procedure the max1567 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) preset the power supply to between 2.8v and 4.2v. 2) turn off the power supply. 3) connect the power-supply positive lead to the pad on the ev kit board labeled batt. 4) connect the power-supply ground lead to the pad on the ev kit board labeled gnd. 5) connect loads from the outputs vm, vsd, out1a, and out2 to gnd. see table 1 for maximum loadcurrents. 6) short pins 2-3 of ju1 to enable vsu. 7) short pins 1-2 of ju2?u6 to disable all other out- puts. 8) turn on the power supply. 9) verify the vsu voltage (5v) using a voltmeter. 10) if desired, connect a load from vsu to gnd. 11) to verify other outputs, move jumpers ju2?u6 to short pins 2-3 to enable corresponding outputs,and verify the output voltage with a voltmeter (table 1). detailed description step-up output (vsu) the main step-up output (vsu) powers the internal cir-cuitry of the max1567 and must reach its regulation voltage (5v) before any other output can turn on. to enable vsu, short pins 2-3 of jumper ju1. when jumper ju1 is on pins 1-2, all outputs shut down and the ic is in low-current shutdown mode. short-circuit flag (scf) scf is an open-drain output that is high impedancewhen overload protection occurs. under normal opera- tion scf pulls low. in the default configuration, there is a 100k pullup resistor (r23) from scf to the input of the main converter. main step-down output (vm) the main step-down output is set to 3.3v. to enablevm, short pins 2-3 of jumper ju2. to shut down vm, short pins 1-2 of ju2. step-down output (vsd) the step-down output (vsd) is set to 1.8v. to enablevsd, short pins 2-3 of jumper ju3. to shut down outsd, short pins 1-2 of ju3. step-down ok ( sdok ) the step-down ok output ( sdok ) is an open-drain out- put that is pulled low when the step-down converterhas completed soft-start. for more details on sdok , refer to the max1566/max1567 ic data sheet. auxiliary output 1 ok ( aux1ok ) aux1ok is an open-drain output that goes low when out1 has successfully completed soft-start. aux1ok goes high impedance in shutdown, overload, and ther-mal limit. ccd/lcd bias outputs (out1a, out1b) the output out1a provides a regulated +15v output.to enable out1a, short pins 2-3 of ju5. to turn off out1a, short pins 1-2 of ju5. in the standard configu- ration, out1a and out2 provide the +15v and -7.5v bias voltages for ccd and lcd. out1b is not used in the standard configuration of the ev kit. outputs out1a and out1b can be configured to use a flyback transformer to provide both the +15v (out1a) and -7.5v (out1b) necessary for ccd and lcd bias. this is useful when using the max1566 where out2 is configured as a boost converter. see the flyback transformer configuration for out1a/out1b section. note 1: if vsu and vm are operating, subtract about 70% of the vm load current from the maximum load capability of vsu.note 2: the led outputs are current regulated to 20ma with overvoltage protection set to 16v. table 1. output voltages and maximumcurrents output voltage (v) maximum current (ma) vsu 5 500 (note 1) vm 3.3 600 vsd 1.8 350 out1a 15 40 out2 -7.5 -80 ledout+ to ledout- 16 max (note 2) 20 downloaded from: http:///
inverter output (out2) out2 is a regulated -7.5v output. to enable out2,connect pins 2-3 of jumper ju6. to shut down out2, connect pins 1-2 of ju6. out2 can also be configured as a boost output when evaluating the max1566. see the evaluating the max1566 section. led outputs (out3+, out3-) outputs out3+ and out3- are for driving a series ofwhite leds for backlighting. the ev kit comes with four surface-mount white leds installed and is configured to drive the leds at a regulated 20ma. to protect against an open led string, the overvoltage protection sets the maximum output voltage to 16v. to evaluate with fewer than four leds, short the pads of the unused leds. to use leds other than the ones mounted on the board, break the string by removing one of the leds on the board, then connect a series array consisting of two to six white leds in series to the out3+ and out3- outputs. the anode side of the array connects to out3+ and the cathode side con- nects to out3-. to enable the led outputs, short pins 2-3 of ju4. to turn the led outputs off, short pins 1-2 of ju4. to adjust the led brightness or overvoltage pro- tection, see the adjusting the led brightness section. customizing the max1567 evaluation kit adjusting the step-up output (vsu) the step-up output (vsu) is adjustable from 2.7v to5.5v using the following procedure: 1) select a value for r16 between 10k and 100k . 2) solve for r15 using: 3) install resistors r15 and r16. note that if the input voltage is greater than whatvsu is set to, then vsu will rise above its regulation voltage. configuring the main step-down output (vm) the input to the main step-down converter is connect-ed to vsu by default. to change this connection to batt, cut the trace shorting ju15 and short ju14. the main step-down output (vm) is adjustable from 1.25v to vsu using the following procedure: 1) select a value for r18 between 10k and 100k . 2) solve for r17 using: 3) install resistors r17 and r18. rr v v vm 17 18 125 1 . = ?? ? ?? ? - rr v v vsu 15 16 125 1 . = ?? ? ?? ? - evaluates: max1566/max1567 max1567 evaluation kit 4 _______________________________________________________________________________________ table 2. jumper functions table 3. pcb jumper functions jumper short pins 1-2 short pins 2-3 ju1 al l outp uts ar e shut d ow n vsu enabled ju2 vm shut down vm enabled ju3 vsd shut down vsd enabled ju4 leds (out3+/out3-)shut down leds (out3+/out3-)enabled ju5 out1 shut down out1 enabled ju6 out2 shut down out2 enabled jumper default function ju7 short ju8 open selects the input power for the out2 converter. short only one of these jumpers. short ju7to connect the out2 input power to batt, or short ju8 to connect to vsu. ju9 short connects the ground planes together. this must remain shorted for proper circuit operation. ju10 short ju11 open ju12 open selects the input power for the step-down converter. short only one of these jumpers. shortju10 to connect the step-down input power to batt, short ju11 for vsu, or short ju12 for vm. ju13 short selects topology for out1a/out1b. short for out1a step-up, or open for out1a/out1btransformer flyback. ju14 open ju15 short selects the input power for the main step-down converter. short only one of these jumpers.short ju14 to connect the input of vm to batt, or short ju15 for vsu. downloaded from: http:///
evaluates: max1566/max1567 max1567 evaluation kit _______________________________________________________________________________________ 5 configuring the step-down output (vsd) the input to the step-down converter (pvsd) on the evkit comes connected to batt, but the connection can be changed to either vm or vsu. to use vm as the input to the step-down converter, cut the trace shorting ju10 and short the pads of ju12. to use vsu as the input to the step-down converter, cut the trace shorting ju10, and short the pads of ju11. make sure one and only one of ju10, ju11, and ju12 is shorted. the step-down output voltage (vsd) is adjustable from 1.25v to v batt using the following procedure: 1) select a value for r20 between 10k and 100k . 2) solve for r19 using: 3) install resistors r19 and r20. adjusting the out1a voltage out1a can be set to a voltage above 1.25v. the upperlimit depends on the ratings of the external components. note that if the input voltage is greater than what out1a is set to, then out1a will rise above its regulation volt- age. use the following procedure to set v out1a : 1) select a value for r12 between 10k and 100k . 2) solve for r11 using: 3) install resistors r11 and r12. configuring the inverting output (out2) the input to the inverter is normally connected to batt.to change this connection to vsu, cut the trace shorting ju7 and short the pads of ju8. note that the lower limit of inverter operation, when powered from batt, depends on the external p-channel mosfet threshold voltage. to adjust the out2 voltage, use the following procedure: 1) select a value for r13 between 10k and 100k . 2) solve for r14 using: 3) install resistors r13 and r14. adjusting the led brightness resistor r3 sets the regulation current of the leds asfollows: the overvoltage-protection threshold for the leds is also adjustable. to ensure the leds are current regu- lated, this threshold (v ovp ) must be set higher than the maximum forward-voltage drop of the led string. v ovp should be set lower than the maximum voltage ratingsof the capacitor, diode, and mosfet (c1, d1, and n1) used in the led driver circuit. use the following proce- dure to set the overvoltage protection: 1) select a value for r1 between 10k and 100k . 2) solve for r2 using: 3) install resistors r1 and r2. changing the switching frequency the switching frequency of the max1567 is adjustable.typically, frequencies from 400khz to 500khz provide a good compromise between efficiency and component size. to change the frequency, replace c3 and r4. refer to the max1566/max1567 ic data sheet for information on selecting values for these components. evaluating the max1566 to evaluate the max1566, first carefully remove u1 andreplace it with the max1566. free samples of the max1566 can be obtained from maxim. the max1566 requires that out2 be configured as a boost converter. configuring out2 as a boost converter to configure out2 as a boost converter, remove compo-nents c17, r13, r14, d7, and p1. then add components c19, r30, r31, d8, l7, and n3. refer to the max1566/max1567 ic data sheet for information on component selection. table 4 shows typical components for generating +15v at up to 20ma. flyback transformer configuration for out1a/out1b out1 can be configured to provide two outputs using atransformer. this is usually done to generate ccd/lcd bias when using the max1566. to use a transformer, remove l2 and cut the trace shorting ju13. install the transformer on the footprint (t1) that overlaps l2 and ju13. refer to the max1566/max1567 ic data sheet for details on component selection. table 5 shows typical components for generating +15v and -7.5v. rr v v ovp 12 125 1 . = ?? ? ?? ? - r v i led 3 02 . = rr v v out 13 14 125 2 . = ?? ? ?? ? - rr v v out a 11 12 125 1 1 . = ?? ? ?? ? - rr v v vsd 19 20 125 1 . = ?? ? ?? ? - downloaded from: http:///
evaluates: max1566/max1567 max1567 evaluation kit 6 _______________________________________________________________________________________ table 4. typical components for out2boost circuit designation qty description c19 1 1? 10%, 25v x7r ceramic capacitor (0805)tdk c2012x7r1e105k r30 1 1m 1% resistor (0603) r31 1 90.9k 1% resistor (0603) l7 1 1.5? inductorsumida cdrh3d16-1r5 d8 1 s chottky d i od e, 40v , 500m a ( s od - 123) c entr al c m h s h 5- 4 n3 1 n-channel mosfet (sot23)fairchild fdn337n table 5. typical components forout1a/out1b transformer circuit designation qty description c18, c20 2 1? 10%, 25v x7r ceramic capacitors (1206)tdk c3216x7r1e105k r11 1 1m 1% resistor (0603) r12 1 90.9k 1% resistor (0603) t1 1 transformertdk ldt565630t-mx1 d6 1 s chottky d i od e, 40v , 500m a ( s od - 123) c entr al c m h s h 5- 4 d9 1 s chottky d i od e, 20v , 500m a ( s od - 123) central cmhsh5-2l n2 1 n-channel mosfet (sot23)fairchild fdn337n downloaded from: http:///
evaluates: max1566/max1567 max1567 evaluation kit _______________________________________________________________________________________ 7 max1567 u1 dl3 dl1 n1 ref 2 1 3 35 36 1 fb3h 39 fb3l 15 ref 22 osc 18 1 ju1 batt vsu batt vsu r211m gnd ledout- ledout+ d2 c1 1 f c1510 f c1610 f c174.7 f r26 r27 l1 4.7 h l3 22 h r1 1.1m r310 r2 90.9k d1 c2 0.1 f c3100pf r4 51k d3 d4 d5 batt 3 2 onsu 14 1 ju2 3 3 2 onm 8 1 ju3 2 onsd 3 40 1 ju4 2 on3 3 4 1 ju5 2 on1 3 29 1 ju6 r5 51k r6 33k r7 22k r8 60.4k r9 100k r10 16.2k c4 6800pf 2 on2 11 susd 16 ccsu c5 3300pf 10 ccsd c6 0.01 f 12 ccm c7 3300pf 38 cc3 c8 2200pf 2 cc1 c9 0.01 f 30 cc2 20 aux1ok vsu r22100k aux1ok 21 sdok sdok batt dl1 batt vsu ju8 open fb1 fb1 3 fb2 31 gnd 33 fb2 d10 c11 open dl2 d7 r13 549k r1490.9k r15274k r1690.9k r23100k dl2 34 indl2 32 p1 out2 out2 -7.5v +5v scf vm +3.3v vsd +1.8v vsu ref l4 10 h l5 10 h r18 90.9k l6 22 h pv 37 pvsu 25 lxsu 24 batt pgsu 23 pgm 26 fbsu 17 pvm 28 scf 19 lxm 27 fbm 13 pvsd 7 batt vsu ju10 short lxsd 6 fbsd 9 pgsd ep 5 ju9 short r17150k vsu d11 c1047 f c1422 f c1310 f c1222 f r19 40.2k r20 90.9k batt ju11open ju12open ju7 short ju14 open ju15short figure 1a. max1567 ev kit schematic (sheet 1 of 2) downloaded from: http:///
evaluates: max1566/max1567 max1567 evaluation kit 8 _______________________________________________________________________________________ n2 n3 l7 batt dl2 d8 r30 c19open out1a +15v out1b -7.5v out2 r31 d6 fb1 c181 f r24 r28 r29 r25 c20 open 13 4 2 t1 l2 4.7 h batt ju13 short 7 8 d9 fb2 5 6 3 2 1 dl1 r111m r12 90.9k figure 1b. max1567 ev kit schematic (sheet 2 of 2) downloaded from: http:///
evaluates: max1566/max1567 max1567 evaluation kit _______________________________________________________________________________________ 9 figure 2. max1567 ev kit component placement?omponent side downloaded from: http:///
evaluates: max1566/max1567 max1567 evaluation kit 10 ______________________________________________________________________________________ figure 3. max1567 ev kit component placement?older side downloaded from: http:///
evaluates: max1566/max1567 max1567 evaluation kit ______________________________________________________________________________________ 11 figure 4. max1567 ev kit pcb layout?omponent side downloaded from: http:///
evaluates: max1566/max1567 max1567 evaluation kit 12 ______________________________________________________________________________________ figure 5. max1567 ev kit pcb layout?nner layer 2 downloaded from: http:///
evaluates: max1566/max1567 max1567 evaluation kit ______________________________________________________________________________________ 13 figure 6. max1567 ev kit pcb layout?nner layer 3 downloaded from: http:///
maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circuit patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. 14 ____________________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: max1566/max1567 max1567 evaluation kit figure 7. max1567 ev kit pcb layout?older side revision history pages changed at rev 1: 1?4 downloaded from: http:///

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