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datasheet ds_dns10sip06_03092009 features ? high efficiency: 89.5%@ 12vin, 3.3v/6a out ? small size and low profile: (sip) 25.4x 12.7x 6.67mm (1.00? x 0.50? x 0.26?) ? standard footprint ? voltage and resistor-based trim ? pre-bias startup ? output voltage tracking ? no minimum load required ? output voltage programmable from 0.75vdc to 5vdc via external resistor ? fixed frequency operation (350khz) ? input uvlo, output otp, ocp ? remote on/off ? iso 9001, tl 9000, iso 14001, qs 9000, ohsas 18001 certified manufacturing facility ? ul/cul 60950-1 (us & canada) recognized, and tuv (en60950-1) certified. ? ce mark meets 73/23/eec and 93/68/eec directives applications ? telecom / datacom ? distributed power architectures ? servers and workstations ? lan / wan applications ? data processing applications options ? negative on/off logic ? tracking feature ? sip package delphi dns, non-is olated point of load dc/dc power modules: 8.3~14vin, 0.75~5.0v/6a out the delphi series dns, 8.3~14v input, single output, non-isolated point of load dc/dc converters are the latest offering from a world leader in power systems technology and manufacturing D delta electronics, inc. the dns series provides a programmable ou tput voltage from 0.75v to 5.0v through an external trimming resistor. the dns converters have flexible and programmable tracking and sequencing features to enable a variety of sequencing and tracking between several point of load power modules. this product family is available in a surface mount or sip package and provides up to 6a of output current in an industry standard footprint and pinout. with creative design technology and optimization of component placement, these converters possess outstanding electrical and thermal performance and extremely high reliability under highly stressful operating conditions.
ds_dns10sip06_03092009 2 technical specifications (t a = 25c, airflow rate = 300 lfm, v in = 8.3vdc and 14vdc, nominal vout unless otherwise noted.) parameter notes and conditions dns10s0a0r06nfd min. typ. max. units absolute maximum ratings input voltage (continuous) 0 15 vdc tracking voltage 0 vin,max vdc operating temperature refer to figure 30 for measuring point -40 +120 c storage temperature -55 +125 c input characteristics operating input voltage vo,set Q 3.63vdc 8.3 12 14 v vo,set 3.63vdc 8.3 12 13.2 v input under-voltage lockout turn-on voltage threshold 7.9 v turn-off voltage threshold 7.8 v maximum input current vin=vin,min to vin,max, io=io,max 4.5 a no-load input current 100 ma off converter input current 2 ma inrush transient vin= vin,min to vin,max, io=io,min to io,max 0.4 a 2 s recommended input fuse 6 a output characteristics output voltage set point vin=12v, io=io,max -2.0 vo,set +2.0 % vo,set output voltage adjustable range 0.7525 5 v output voltage regulation over line vin=vin,min to vin,max 0.3 % vo,set over load io=io,min to io,max 0.4 % vo,set over temperature ta= -40 to 85 0.4 % vo,set total output voltage range over sample load, line and temperature -2.5 +3.5 % vo,set output voltage ripple and noise 5hz to 20mhz bandwidth peak-to-peak vin=min to max, io=min to max1f ceramic, 10f tan 50 75 mv rms vin=min to max, io=min to max1f ceramic, 10f tan 15 30 mv output current range 0 6 a output voltage over-shoot at start-up vout=3.3v 1 % vo,set output dc current-limit inception 200 % io output short-circuit current (hiccup mode) io,s/c 2 adc dynamic characteristics dynamic load response 10f tan & 1f ceramic load cap, 2.5a/s, vin=12v positive step change in output current 50% io, max to 100% io, max 200 mvpk negative step change in output current 100% io, max to 50% io, max 200 mvpk settling time (vo< 10% peak deviation ) 25 s turn-on transient io=io.max start-up time, from on/off control von/off, vo=10% of vo,set 3 ms start-up time, from input vin=vin,min, vo=10% of vo,set 3 ms output voltage rise time time for vo to rise from 10% to 90% of vo,set 4 6 ms output capacitive load full load; esr R 1m ? 1000 f full load; esr R 10m ? 3000 f efficiency vo=0.75v vin=12v, io=io,max 72.5 % vo=1.2v vin=12v, io=io,max 80.0 % vo=1.5v vin=12v, io=io,max 83.0 % vo=1.8v vin=12v, io=io,max 85.0 % vo=2.5v vin=12v, io=io,max 87.5 % vo=3.3v vin=12v, io=io,max 89.5 % vo=5.0v vin=12v, io=io,max 91.5 % feature characteristics switching frequency 350 khz on/off control, (negative logic) logic low voltage module on, von/off -0.2 0.3 v logic high voltage module off, von/off 2.5 vin,max v logic low current module on, ion/off 10 ua logic high current module off, ion/off 0.2 1 ma on/off control, (positive logic) logic high voltage module on, von/off vin,max v logic low voltage module off, von/off -0.2 0.3 v logic high current module on, ion/off 10 ua logic low current module off, ion/off 0.2 1 ma tracking slew rate capability 0.1 2 v/msec tracking delay time delay from vin.min to application of tracking voltage 10 ms tracking accuracy power-up, subject to 2v/ms 100 200 mv power-down, subject to 1v/ms 200 400 mv general specifications mtbf io=80%io, max, ta=25 2.12 m hours weight 4 grams over-temperature shutdown refer to figure 30 for the measuring point 124 c
ds_dns10sip06_03092009 3 electrical characteristics curves figure 1: converter efficiency vs. output current (0.75v output voltage) figure 2: converter efficiency vs. output current (1.2v output voltage) figure 3: converter efficiency vs. output current (1.5v output voltage) figure 4: converter efficiency vs. output current (1.8v output voltage) figure 5: converter efficiency vs. output current (2.5v output voltage) figure 6: converter efficiency vs. output current (3.3v output voltage) 74 76 78 80 82 84 86 88 123 456 load (a) efficiency(%) 8.3v 12v 14v 65 67 69 71 73 75 77 79 81 83 85 123 456 load (a) efficiency(%) 8.3v 12v 14v 76 78 80 82 84 86 88 90 123 456 load (a) efficiency(%) 8.3v 12v 14v 76 78 80 82 84 86 88 90 123 456 load (a) efficiency(%) 8.3v 12v 14v 80 82 84 86 88 90 92 123 456 load (a) efficiency(%) 8.3v 12v 14v 80 82 84 86 88 90 92 94 123 456 load (a) efficiency(%) 8.3v 12v 14v
ds_dns10sip06_03092009 4 electrical characteristics curves figure 7: converter efficiency vs. output current (5.0v output voltage) figure 8: output ripple & noise at 12vin, 2.5v/6a out figure 9: output ripple & noise at 12vin, 5.0v/6a out figure 10: turn on delay time at 12vin, 5.0v/6a out figure 11: turn on delay time at remote on/off, 5.0v/6a out v in v o v o remote on/off 82 84 86 88 90 92 94 96 123456 load (a) efficiency(%) 8.3v 12v 13.2v
ds_dns10sip06_03092009 5 electrical characteristics curves figure 12: turn on using remote on/off with external capacitors (co= 3000 f), 5.0v/6a out figure 13: typical transient response to step load change at 2.5a/ s from 100% to 50% of io, max at 12vin, 5.0v out (cout = 1uf ceramic, 10 f tantalum) io:2a/div figure 14: typical transient response to step load change at 2.5a/ s from 50% to 100% of io, max at 12vin, 5.0v out (cout = 1uf ceramic, 10 f tantalum) io:2a/div figure 15: output short circuit current 12vin, 0.75vout (5a/div) figure 16: turn on with prebias 12vin, 5v/0a out, vbias =3.3vdc v o remote on/off
ds_dns10sip06_03092009 6 test configurations v i (+) v i (-) battery 2 100uf tantalum l to oscilloscope note: input reflected-ripple current is measured with a simulated source inductance. current is measured at the input of the module. figure 17: input reflected-ripple test setup vo gnd copper strip 10uf tantalum 1uf ceramic scope resistive load note: use a 10 f tantalum and 1 f capacitor. scope measurement should be made using a bnc connector. figure 18: peak-peak output noise and startup transient measurement test setup supply i vi vo gnd io load contact and distribution losses contact resistance figure 19: output voltage and efficiency measurement test setup note: all measurements are taken at the module terminals. when the module is not soldered (via socket), place kelvin connections at module terminals to avoid measurement errors due to contact resistance. % 100 ) ( = ii vi io vo design considerations input source impedance to maintain low-noise and ripple at the input voltage, it is critical to use low esr capacitors at the input to the module. figure 20 shows the input ripple voltage (mvp-p) for various output models using 2x47 uf low esr tantalum capacitors (sanyo p/n:16tqc47m, 47uf/16v or equivalent) and 2x22 uf very low esr ceramic capacitors (tdk p/n:c3225x7s1c226mt, 22uf/16v or equivalent). the input capacitance should be able to handle an ac ripple current of at least: arms vin vout vin vout iout irms ? ? ? ? ? ? ? = 1 0 50 100 150 200 250 300 0123456 output voltage (vdc) input ripple volt age (mvp-p) tantalum ceramic figure 20: input ripple voltage for various output models, io = 6a (cin = 2x47uf tantalum capacitors and 2x22uf ceramic capacitors at the input)
ds_dns10sip06_03092009 7 design considerations (con.) the power module should be connected to a low ac-impedance input source. highly inductive source impedances can affect the stability of the module. an input capacitance must be placed close to the modules input pins to filter ripple current and ensure module stability in the presence of inductive traces that supply the input voltage to the module. safety considerations for safety-agency approval the power module must be installed in compliance with the spacing and separation requirements of the end-use safety agency standards. for the converter output to be considered meeting the requirements of safety extra-low voltage (selv), the input must meet selv requirements. the power module has extra-low voltage (elv) outputs when all inputs are elv. the input to these units is to be provided with a maximum 6a of glass type fast-acting fuse in the ungrounded lead. features descriptions remote on/off the dns series power modules have an on/off pin for remote on/off operation. both positive and negative on/off logic options are available in the dns series power modules. for positive logic module, connect an open collector (npn) transistor or open drain (n channel) mosfet between the on/off pin and the gnd pin (see figure 21). positive logic on/off signal turns the module on during the logic high and turns the module off during the logic low. when the positive on/off function is not used, leave the pin floating or tie to vin (module will be on). for negative logic module, the on/off pin is pulled high with an external pull-up resi stor (see figure 22) negative logic on/off signal turns the module off during logic high and turns the module on during logic low. if the negative on/off function is not used, leave the pin floating or tie to gnd. (module will be on) rl vo vin on/off gnd i on/off figure 21: positive remote on /off implementation vo vin on/off gnd rpull-up rl i on/off figure 22: negative remote on/off implementation over-current protection to provide protection in an output over load fault condition, the unit is equipped with internal over-current protection. when the over-current protection is triggered, the unit enters hiccup mode. the units operate normally once the fault condition is removed.
ds_dns10sip06_03092009 8 features descriptions (con.) over-temperature protection the over-temperature protecti on consists of circuitry that provides protection from thermal damage. if the temperature exceeds the ov er-temperature threshold the module will shut down. the module will try to restart after shutdown. if the over-t emperature condition still exists during restart, the module will shut down again. this restart trial will continue until the temperature is within specification. output voltage programming the output voltage of the dns can be programmed to any voltage between 0.75vdc and 5.0vdc by connecting one resistor (shown as rtrim in figure 23) between the trim and gnd pins of the module. without this external resistor, the output voltage of the module is 0.7525 vdc. to calculate the value of the re sistor rtrim for a particular output voltage vo, please use the following equation: rtrim 10500 vo 0.7525 ? 1000 ? ? ? ? ? ? ? ? := rtrim is the external resistor in ? vo is the desired output voltage for example, to program the output voltage of the dns module to 3.3vdc, rtrim is calculated as follows: rtrim 10500 2.5475 1000 ? ? ? ? ? ? ? ? := rtrim = 3.122 k ? dns can also be programmed by applying a voltage between the trim and gnd pins (figure 24). the following equation can be used to determine the value of vtrim needed for a desired output voltage vo: vtrim 0.7 vo 0.7525 ? ( ) 0.0667 ? ? ? ? ? ? := vtrim is the external voltage in v vo is the desired output voltage for example, to program the output voltage of a dns module to 3.3 vdc, vtrim is calculated as follows vtrim 0.7 2.5475 0.0667 ? ( ) ? := vtrim = 0.530v figure 23: circuit configuration for programming output voltage using an external resistor figure 24: circuit configuration for programming output voltage using external voltage source
ds_dns10sip06_03092009 9 the amount of power delivered by the module is the voltage at the output terminals multiplied by the output current. when using the trim feature, the output voltage of the module can be increased, which at the same output current would increase the power output of the module. care should be taken to ensure that the maximum output power of the module must not exceed the maximum rated power ( vo.set x io.max p max ). voltage margining output voltage margining can be implemented in the dns modules by connecting a resistor, r margin-up , from the trim pin to the ground pin for margining-up the output voltage and by connecting a resistor, r margin-down , from the trim pin to the output pin for margining-down. figure 25 shows the circuit configuration for output voltage margining. if unused, leave the trim pin unconnected. a calculation tool is available from the evaluation procedure, which computes the values of r margin-up and r margin-down for a specific output voltage and margin percentage. vo on/off vin gnd trim q2 q1 rmargin-up rmargin-down rtrim figure 25: circuit configuration for output voltage margining voltage tracking the dns family was designed for applications that have output voltage tracking requirements during power-up and power-down. the devices have a track pin to implement three types of tracking method: sequential start-up, simultaneous and ratio-metric. track simplifies the task of supply voltage tracking in a power system by enabling modules to track each other, or any external voltage, during power-up and power-down. by connecting multiple modules together, customers can get multiple modules to track their output voltages to the voltage applied on the track pin. feature descriptions (con. ) table 1 provides rtrim values required for some common output voltages, while table 2 provides value of external voltage source, vtrim, for the same common output voltages. by using a 1% tolerance trim resistor, set point tolerance of 2% can be achieved as specified in the electrical specification. table 1 vo (v) rtrim (k ? ) 0.7525 open 1.2 22.464 1.5 13.047 1.8 9.024 2.5 5.009 3.3 3.122 5.0 1.472 table 2 vo (v) vtrim (v) 0.7525 open 1.2 0.670 1.5 0.650 1.8 0.630 2.5 0.583 3.3 0.530 5.0 0.4167
ds_dns10sip06_03092009 10 figure 28: ratio-metric feature descriptions (con. ) the output voltage tracking f eature (figure 26 to figure 28) is achieved according to the different external connections. if the tracking feature is not used, the track pin of the module can be left unconnected or tied to vin. for proper voltage tracking, input voltage of the tracking power module must be applied in advance, and the remote on/off pin has to be in turn-on status. (negative logic: tied to gnd or unconnect ed. positive logic: tied to vin or unconnected) figure 26: sequential figure 27: simultaneous ps1 ps1 ps1 ps1 ps2 ps2 ps2 ps2 + v ps1 ps2 ps1 ps2
ds_dns10sip06_03092009 11 feature descriptions (con. ) sequential start-up sequential start-up (figure 26) is implemented by placing an on/off control circuit between vo ps1 and the on/off pin of ps2. simultaneous simultaneous tracking (figure 27) is implemented by using the track pin. the objective is to minimize the voltage difference between the power supply outputs during power up and down. the simultaneous tracking can be accomplished by connecting vo ps1 to the track pin of ps2. please note the voltage apply to track pin needs to always higher than the vo ps2 set point voltage. ratio-metric ratio?metric (figure 28) is implemented by placing the voltage divider on the track pin that comprise r1 and r2, to create a proportional voltage with vo ps1 to the track pin of ps2. for ratio-metric applications that need the outputs of ps1 and ps2 reach the regulation set point at the same time. the following equation can be used to calculate the value of r1 and r2. the suggested value of r2 is 10k ? . 2 1 2 1 , 2 , r r r v v ps o ps o + = r1 r2 track vo ps1 ps2 vo ps2 ps1 vin vin on/off on/off the high for positive logic the low for negative logic r1 r2 vo ps1 ps1 vin on/off on/off ps2 vo ps2 vin c1 q1 r3 track vo ps1 ps2 vo ps2 ps1 vin vin on/off on/off
ds_dns10sip06_03092009 12 thermal considerations thermal management is an important part of the system design. to ensure proper, reliable operation, sufficient cooling of the power module is needed over the entire temperature range of the modul e. convection cooling is usually the dominant mode of heat transfer. hence, the choice of equipment to characterize the thermal performance of the power module is a wind tunnel. thermal testing setup delta?s dc/dc power modules are characterized in heated vertical wind tunnels t hat simulate the thermal environments encountered in most electronics equipment. this type of equipment commonly uses vertically mounted circuit card s in cabinet racks in which the power modules are mounted. the following figure shows the wind tunnel characterization setup. the power module is mounted on a test pwb and is vertically positioned within the wind tunnel. the height of this fan duct is constantly kept at 25.4mm (1??). thermal derating heat can be removed by increasing airflow over the module. to enhance system reliability, the power module should always be operated below the maximum operating temperature. if the temperature exceeds the maximum module temperature, reliability of the unit may be affected. note: wind tunnel test setup figure dimensions are in millimeters and (inches) module air flow 12.7 (0.5?) 50.8 ( 2.0? ) facing pwb pwb air velocity and ambient temperature measured below the module 25.4 (1.0?) figure 29: wind tunnel test setup
ds_dns10sip06_03092009 13 thermal curves figure 30: temperature measurement location t he allowed maximum hot spot te mperature is defined at 120 dns10s0a0r06(standard) output current vs. ambient temperature and air velocity @ vin = 12v, vo = 5.0v (either orientation) 0 1 2 3 4 5 6 7 30 35 40 45 50 55 60 65 70 75 80 85 ambient temperature ( ) output current(a) natural convection 100lfm 200lfm 300lfm 400lfm 500lfm 600lfm figure 31: dns0a0r06(standard) output current vs. ambient temperature and air velocity@ vin=12v, vout=5.0v (either orientation) dns10s0a0r06(standard) output current vs. ambient temperature and air velocity @ vin = 12v, vo = 1.8v (either orientation) 0 1 2 3 4 5 6 7 30 35 40 45 50 55 60 65 70 75 80 85 ambient temperature ( ) output current(a) natural convection 100lfm 200lfm 300lfm 500lfm 400lfm figure 32: dns0a0r06(standard)output current vs. ambient temperature and air velocity@ vin=12v, vout=1.8v (either orientation) dns10s0a0r06(standard) output current vs. ambient temperature and air velocity @ vin = 12v, vo = 0.75v (either orientation) 0 1 2 3 4 5 6 7 30 35 40 45 50 55 60 65 70 75 80 85 ambient temperature ( ) output current(a) natural convection 100lfm 200lfm 300lfm 400lfm 500lfm figure 33: dns0a0r06(standard) output current vs. ambient temperature and air velocity@ vin=12v, vout=0.75v (either orientation)
ds_dns10sip06_03092009 14 mechanical drawing smd package (optional) sip package
ds_dns10sip06_03092009 15 part numbering system dns 10 s 0a0 r 06 p f d product series input voltage numbers of outputs output voltage package type output current on/off logic option code dns - 6a dnm -10a dnl - 16a 04 - 2.8v ~ 5.5v 10 - 8.3v ~14v s - single 0a0 - programmable r - sip s - smd 06 - 6a n- negative p- positive f- rohs 6/6 (lead free) d - standard function model list model name packaging input voltage output voltage output current on/off logic efficiency 12vin @ 100% load dns10s0a0r06nfd sip 8.3v ~ 14v 0.75v ~ 5.0v 6a negative 89.5% (3.3v) dns10s0a0r06pfd sip 8.3v ~ 14v 0.75v ~ 5.0v 6a positive 89.5% (3.3v) dns10s0a0s06nfd smd 8.3v ~ 14v 0.75v ~ 5.0v 6a negative 89.5% (3.3v) dns10s0a0s06pfd smd 8.3v ~ 14v 0.75v ~ 5.0v 6a positive 89.5% (3.3v) contact: www.delta.com.tw/dcdc usa: telephone: east coast: (888) 335 8201 west coast: (888) 335 8208 fax: (978) 656 3964 email: dcdc@delta-corp.com europe: phone: +41 31 998 53 11 fax: +41 31 998 53 53 email: dcdc@delta-es.com asia & the rest of world: telephone: +886 3 4526107 ext 6220~6224 fax: +886 3 4513485 email: dcdc@delta.com.tw warranty delta offers a two (2) year limited warranty. complete warranty information is listed on our web site or is available upon request from delta. information furnished by delta is believed to be accurate and reliable. however, no responsibility is assumed by delta for its use, nor for any infringements of patents or other rights of third parties, which may result from its use. no license is granted by implication or otherwise under

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