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e48 sd1202 0 240 w dc /dc power modules ds_ e48sd1202 0_0 704 2013 e - mail dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 1 features ? input voltage range: 3 8 v~ 75 v ? output voltage range ( trim, remote sense and pmbus) 8 v~ 13.2 v ? high efficiency : 95. 6 % @ 48vin/ 2 0 a ? size: 58.4 mm x 22.8 m m x 11.0 mm (2. 3 x 0.9 x 0.43 )(w/o heat - spreader) 58.4 mm x 22.8 m m x 12.7 mm (2. 3 x 0.9 x 0.5 )(with heat - spreader) ? industry standard dosa compliant pin out ? fully protected: input uvlo, output ocp and o v p , o t p ? 1 5 0 0 v isolation ? no minimum load required ? fixed frequency operation ? iso 9001, tl 9000, iso 14001, qs9000, ohsas18001 certified man ufacturing facility ? ul/ c ul 60950 - 1 (us & canada) pending delphi series e48sd1202 0 , eighth brick family dc/dc power modules: 3 8 ~ 75 vin, 1 1.7 vout, 240 w the delphi series e48 sd1202 0 , eighth brick, 3 8 ~75v input, single output 1 1.7 v, are full digital control dc/dc converter , and are the latest offering from a world leader in power system and technology and manufacturi ng D delta electronics, inc. this product provides up to 240 watts of power at 3 8 ~75v input in an industry standard , dosa compliant footprint and pin out. the e48 sd1202 0 offers more than 95 . 6 % high efficiency at 48v input, 1 1.7 v output and 2 0 a load . there is a built - in digital pwm controller in the e48sd1202 0 series, which is used to complete the vo feedback, pwm signal generation, fault protection, output voltage trim, on/off control and pmbus communications, and so on. with the digital control, many desig n and application flexibility, advanced performance, and reliability are obtained. options ? positive or negative on/off logic ? open frame / w ith heat - spreader option ? digital pmbus interface option applications ? data com / networking ? wireless networks ? optical network equipment ? server and data storage ? industrial / testing equipment free datasheet http:///
ds_ e48sd1202 0 _0 704 2013 e - mail dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 2 technical specifications (t a =25c , airflow rate= 4 00 lfm, v in = 48 vdc, nominal vout unless otherwise noted. ) parameter notes and conditions e48sd1202 0 min. typ. max. units absolute maximum ratings input voltage continuous 0 75 vdc transient (100ms) 100ms 100 vdc o utput negative voltage 0.3 v operating ambient temperature - 40 85 c storage temperature - 55 125 c input/output isolation voltage 1 5 0 0 vdc input characteristics operating input voltage 3 8 48 75 vdc input under - volt age lockout turn - on voltage threshold (adjustable via pmbus, vin_on) 34 36 vdc turn - off voltage threshold (adjustable via pmbus, vin_off) 31 34 vdc lockout hysteresis voltage 2 vdc maximum input current 2 0 a load, 3 8 vin 7 a no - load input current vin= 48 v 50 1 00 ma off converter input current vin= 48 v 10 30 ma input capacitance 100 uf inrush current (i 2 t) 1 a2s input reflected - ripple current p - p thru 12h inductor, 5hz to 20mhz 25 ma input voltage ripple rejection 120hz 50 db output characteristics output voltage set point (adjustable via pmbus) vin= 48 v, io=0a , ta=25c 11. 5 8 11.70 11.82 vdc output voltage regulation over line vin= 38 v to 75v, io=100% load 48 mv over load vin= 38 v to 75v , io=io,min to io,max 48 mv over tempearture vin= 38 v to 75v, io=100% load, ta= - 40c to 85c 108 mv total output voltage range trim, remote sense and pmbus , trim up at vin>44v 8.00 13.20 vdc output over - voltage lockout (adjustable via pmbus, vout_ov_fault_limit) 14.6 vdc output capacitance 0 10 000 f output voltage ripple and noise vin= 48 v , full load , 20mhz bandwidth peak - to - peak co= 220 uf/ 16 v (polymer ) + 10u/16v (tantalum capacitor) +1u/16 v ( c eramic ) 80 150 mv rms co= 220 uf/ 16 v (polymer ) + 10u/16v (tan talum capacitor) +1u/16 v ( c eramic ) 25 50 mv dynamic characteristics output voltage current transient vin=48v, load slew rate 0.1 a/s with a 1uf ceramic , a 10uf tantalum, and a 220uf polymer capacitor positive step change in output current 50 % io.max to 75 % io.max 250 mv negative step change in output current 75 % io.max to 50 % io.max - 250 mv settling time (within 1% vout nominal) 5 00 s turn - on transient (adjustable via pmbus) start - up time, from on/off control f rom on/off to 9 0%vo final value 40 ms start - up time, from input f rom input to 9 0%vo final value 5 5 ms output voltage rise time f rom 1 0%vo final value to 9 0%vo final value 20 ms efficiency 100% load vin= 3 8 v 95.6 % 100% load vin= 48 v 95.6 % 60 % load vin = 48 v 95.6 % isolation characteristics input to output 1 5 0 0 vdc isolation resistance 10 m isolation capacitance 69 00 pf feature characteristics switching frequency 175 k hz on/off control, positive remote on/off logic logic low (module on ) von/off at ion/off=1.0ma 0 0.8 v logic high (module o ff ) von/off at ion/off=0.0 a 4.0 9 v on/off current (for both remote on/off logic) ion/off at von/off=0.0v 0. 5 ma general specifications mtbf io=80% of io max; ta=25 c; airflow=600lfm 1 m hours weight without heat - spreader 32.6 grams weight with heat - spreader 40.4 grams over - temperature shutdown ( without heat spreader) refer to figure 2 1 for hot spot 1 location (48vin, 80% io, 200lfm,airflow from vin - to vi n + ) 132 c over - temperature shutdown ( with heat spreader) refer to figure 2 3 for hot spot 2 location (48vin, 80% io, 200lfm,airflow from vin - to vin + ) 120 c over - temperature shutdown ( ntc resistor ) refer to figure 2 1 for ntc resistor location 128 c note: please attach thermocouple on ntc resistor to test otp function, the hot spots temperature is just for reference. and the otp is adjustable via pmbus. free datasheet http:///
ds_ e48sd1202 0 _0 704 2013 e - mail dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 3 digit al interface specifications (t a =25c , airflow rate= 4 00 l fm, v in = 48 vdc, nominal vout unless otherwise noted.) pin de fina tion pin# name function pin# name function 1 vin(+) 9 c2 pgood pin , and this pin also could be configurated as secondary on/off control pin 2 on/off primary on/off control pin 10 sig_g nd signal ground 3 vin( - ) 11 data pmbus data line 4 vout( - ) 12 smbalert pmbus smbalert line 5 sense( - ) remote sense 13 clock pmbus clock line 6 trim trim note 1 14 addr1 addr1 pin sets the high order digit of the address. 7 sense(+) remote sense 15 addr0 addr0 pin sets the low order digit of the address. 8 vout(+) note1: s ee the last page. parameter notes and conditions e48sd1202 0 min. typ. max. units pmbus signal interface characteristics input high voltage (clk, data) 2.1 3.6 vdc input low voltage (clk, data) 0 0.8 vdc input high level current (clk, data) - 10 10 ua input low level current (clk, data) - 10 10 ua output low voltage (smbalert#) iout=2ma 0.4 vdc output high level open drain leakage current (smbalert#) vout=3.6v 0 10 ua pmbus operating frequency range 100 400 khz measur ement system characteristics output current reading accuracy iout =2 0 a - 3 +3 adc vout reading accuracy 1 % vin reading accuracy - 2 +2 vdc temperature sense range 0 c temperature reading accuracy - 5 +5 c free datasheet http:///
ds_ e48sd1202 0 _0 704 2013 e - mail dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 4 s i mplified a pplication circuit vout(+) trim addr0 addr1 on/off delta dc/dc module emi filter fuse load input source system mcu clock data c2 sm b - alert clk data pgood / on/off alert on/off control vin( - ) sense( - ) sense(+) vout( - ) vin(+) reverse voltage protect resistance of trace resistance of trace free datasheet http:///
ds_ e48sd1202 0 _0 704 2013 e - mail dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 5 electrical character istics curves figure 1: efficiency vs. load current for m inimum, nominal, and maximum input voltage at 25c. figure 2: power loss vs. load current for minimum, nominal, and maximum input voltage at 25c. figure 3: typical full load input characteristics at room temperature. 77 79 81 83 85 87 89 91 93 95 97 2 4 6 8 10 12 14 16 18 20 output current (a) efficiency(%) 38vin 48vin 75vin 2 4 6 8 10 12 14 16 18 2 4 6 8 10 12 14 16 18 20 output current(a) power dissipation (w) 38vin 48vin 75vin 0 1 2 3 4 5 6 7 30 35 40 45 50 55 60 65 70 75 input voltage(v) input current(a) free datasheet http:///
ds_ e48sd1202 0 _0 704 2013 e - mail dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 6 electrical character istic s curves for negative remote on/off logic figure 4: turn - on transient at zero load current) ( 2 0 ms/div). top trace: vout; 5 v/div; bottom trace: on/off input: 5 v/div. figure 5: turn - on transient at full rated load current ( 2 0 ms/div). top trace: vout : 5 v/div; bottom trace: on/off input: 5 v/div. for input voltage start up figure 6: turn - on transient at zero load current ( 2 0 ms/div). top trace: vout; 5 v/div; bottom trace: input voltage : 30 v/div. figure 7 : turn - on transient at full rated load curr ent ( 2 0 ms/div). top trace: vout; 5 v/div; bottom trace: input voltage : 30 v/div. free datasheet http:///
ds_ e48sd1202 0 _0 704 2013 e - mail dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 7 electrical character istics curves figure 8 : output voltage response to step - change in load current (75% - 50% of io, max; di/dt = 0.1a/s , vin=48v ). load cap: 220 f, e lectrolytic capacitor ; 10f, tantalum capacitor and 1f ceramic capacitor. top trace: vout (200mv/div, 200us/div); bottom trace: io ( 10 a/div, 200us/div). scope measurement should be made using a bnc cable (length shorter than 20 inches). position the load between 51 mm to 76 mm (2 inches to 3 inches) from the module.. figure 9 : output voltage response to step - change in load current (50% - 75% of io, max; di/dt = 0.1a/s , vin=48v ). load cap: 220 f, e lectrolytic capacitor ; 10f, tantalum capacitor and 1f ce ramic capacitor. top trace: vout (200mv/div, 200us/div); bottom trace: io ( 10 a/div, 200us/div). scope measurement should be made using a bnc cable (length shorter than 20 inches). position the load between 51 mm to 76 mm (2 inches to 3 inches) from the mod ule.. figure 10: test set - up diagram showing measurement points for input terminal ripple current and input reflected ripple current. note: measured input reflected - ripple current with a simulated source inductance (l test ) of 1 2 h. capacitor cs offset possible battery impedance. measure current as shown above. figure 11: input terminal ripple current, i c , at full rated output current and nominal input voltage with 12h source impedance and 100f electrolytic capacitor ( 0. 2 a/ div 2us/div ). free datasheet http:///
ds_ e48sd1202 0 _0 704 2013 e - mail dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 8 electrical character istics curves figure 12: input reflected ripple current, i s , through a 12h source inductor at nominal input voltage and rated load current (2 0m a/div 2us /div ). figure 13: output voltage noise and ripple meas urement test setup. figure 14: output voltage ripple at nominal input voltage and rated load current (io= 2 0 a) ( 5 0 mv/div , 2us/div ) loadcapacitance: 22 0uf (electrolytic)+10uf(tantalum)+1uf(ce ramic) and min co . bandwidth: 20 mhz. figure 15: output v oltage vs. load current showing typical current limit curves and converter shutdown points. 0 2 4 6 8 10 12 14 0 5 10 15 20 25 30 output current(a) output voltage(v) free datasheet http:///
ds_ e48sd1202 0 _0 704 2013 e - mail dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 9 design consideration s input source impedance the impedance of the input source connecting to the dc/dc power modules will interact with the modules and affect the stability. a low ac - impedance input source is recommended. if the source in ductance is more than a few h, we advise adding a 100f electrolytic capacitor (esr < 0.2 at 100 khz) mounted close to the input of the module to improve the stability. layout and emc considerations deltas dc/dc power modules are designed to operate in a wide variety of systems and applications. for design assistance with emc compliance and related p w b layout issues, please contact deltas technical support team. an external input filter module is available for easier emc compliance design. below is the reference design for an input filter and tested result which can meet class b in cisspr 22. schematic : te st result: 25c, 48vin, full load, green line is average peak mode and blue line is quasi mode. safety considerations the pow er module must be installed in compliance with the spacing and separation requirements of the end - users safety agency standard, i.e., ul60950 - 1, csa c22.2 no. 60950 - 1 2nd, iec 60950 - 1 2nd : 2005,en 60950 - 1 2nd: 2006+a11+a1: 2010, if the system in which th e power module is to be used must meet safety agency requirements. when the input source is selv , the power module meets selv (safety extra - low voltage) requirements. if the input source is a hazardous voltage which is greater than 60 vdc and less than or equal to 75 vdc, for the modules output to meet selv requirements, all of the following must be met: ? the input source must be insulated from the ac mains by reinforced or double insulation. ? the input terminals of the module are not operator accessible. ? one vout pin is grounded. ? a selv reliability test is conducted on the system where the module is used , in combination with the module, to ensure hazardous voltage does not appear at the modules output. when installed into a class ii equipment (without grounding), spacing consideration should be given to the end - use installation, as the spacing between the module and mounting surface have not been evaluated. the power module has extra - low voltage (elv) outputs when all inputs are elv. this power modul e is not internally fused. to achieve optimum safety and system protection, an input line fuse is highly recommended. the safety agencies require a normal - blow fuse with 20 a maximum rating to be installed in the ungrounded lead. a lower rated fuse can be u sed based on the maximum inrush transient energy and maximum input current. soldering and cleaning considerations post solder cleaning is usually the final board assembly process before the board or system undergoes electrical testing. inadequate cleani ng and/or drying may lower the reliability of a power module and severely affect the finished circuit board assembly test. adequate cleaning and/or drying is especially important for un - encapsulated and/or open frame type power modules. for assistance on a ppropriate soldering and cleaning procedures, please contact deltas technical support team. free datasheet http:///
ds_ e48sd1202 0 _0 704 2013 e - mail dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 10 output overvoltage protection the module can detect and respond to output overvoltage conditions. if the overvoltage condition causes the output voltage to rise above the limit in the specifications table, the module will shut down. the m odules will try to restart after shutdown . if fault condition still exists, the modules will shut down again. this restart trial will continue until the fault condition is corrected. the vo ovp function could be changed via pmbus. the commond related to v o ovp function are vout_ov_warn_limit, vout_ov_fault_limit and vout_ov_ fault _response. input over voltage lockout the module can detect and respond to input overvoltage conditions. if the input vol tage rise s above the limit in the specifications table, the module will shut down. the module is factory default configured for auto - restart operation. the auto - restart f eature continually monitors the input voltage and will restart the module when the level fal ls 6v below the inp ut ovp level. the vin ovp f unction could be changed via pmbus. the commond related to vin ovp function are vin_ov_fault_limit and vin_ov_fault_response remote on/off (enable) the remote on/off (enable) feature on the module is negative logic. the low logic turns the modules on. an d the high logic, or floating, turns the modules off. remote on/off (enable) can be controlled by an external switch between the on/off terminal and the v i n( - ) terminal. the switch can be an open collector or open drain. features description s over - power protection the modules include an internal output over - power protection circuit, which will endure power lim iting for an unlimited duration during output overload. if the output current exceeds the ocp set points, the modules will automatically shut down (hiccup mode). the modules will try to restart after shutdown. if the overload condition still exists, the m odules will shut down again. this restart trial will continue until the overload condition is corrected. the ocp function could be changed via pmbus. the commond related to ocp function are iout_oc_warn_limit, iout_oc_fault_limit and iout_oc_ fault _respo nse. over - temperature protection the over - temperature protection consists of circuitry that provides protection from thermal damage. if the temperature exceeds the over - temperature threshold, the modules will shut down, and enter the auto - restart mode. for auto - restart mode, the module will monitor the module temperature after shutdown. once the temperature of module is decreased by an otp hysteresis, the module will restart. the otp function could be changed via pmbus. the commond related to otp function are ot _warn_limit, ot_fault_limit and ot_fault _response. input under voltage lockout when vin exceeds vin turn on threshold, the module output is enabled, when vin falls b elow vin turn off threshold, the module output is disabled. vin turn on threshold and vin turn off threshold can be reconfigured via the pmbus interface. the vin uvp function could be changed via pmbus. the commond related to vin uvp function are vin_on and vin_off. free datasheet http:///
ds_ e48sd1202 0 _0 704 2013 e - mail dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 11 for the negative logic , i f the remote on/off (enable) feature is not used, please maintain the enable pin to vin ( - ). figure 16: remote on/off (enable) implementation secondary remote on/off reference to the vo( - ) terminal, there is a c2 pin. the default configuration is set t o pgood function. and such pin can be reconfigured as secondary remote on/off pin by the pmbus interface including either negative or positive logic. negative logic turns the module o n during a logic low and off during a logic high. positive logic turns the modules on during a logic high and off during a logic low. the secondary remote on/off can be controlled by an external switch between the on/off terminal and the vo( - ) terminal. th e switch can be an open collector or open drain. mfr_c1_c2_ara_config, mfr_ c2_logic, mfr_pgood_polarity are used to config c2 pin function. remote sense remote sense minimizes the effects of distribution losses by regulating the voltage at the remote - sense connections (see figure 1 7 ). the sense( - ) pin should be always connected to vo( - ) pin . the voltage between the remote - sense pins and the output terminals must not exceed the output voltage sense range given in the feature specifications [vo(+) C v o( C )] C sense(+) 0.5 v the output voltage can also be increased by the trim, the maximum increase for the output voltage is the sum of both. the amount of power delivered by the module is defined as the voltage at the output terminals multiplied by the o utput current. when using remote sense and trim, 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 remains at or below the maximum rated power (maximum rated power = vo,set x io,max) figure 17: circuit configuration for remote sense. configurable control pins the module contains one configurable control pins c2, referenced to the module secondary sig_gnd. see mechanical views for pin locations. the following table list the default factory configurations for the functions assigned to the pin. pin designation/function configuration c2 power good factory default on/off optional vias pmbus out put voltage adjustment (trim) note1 to increase or decrease the output vol tage set point, connect an external resistor between the trim pin and either the vo(+) or vo( - ). the trim pin should be left open if this feature is not used. figure 1 8 : circuit configuration for trim - down (decrease output voltage) if the external resistor is connected between the trim and vo ( - ) pins, the output voltage set point decreases (fig. 1 8). the external resistor value required to obtain a percentage of output voltage change % is defined as: ex. when trim - down - 10% (1 1.7 v0.9=10. 53 v) r load vin+ enable vin - vo+ vo - r load vin+ enable vin - vo+ vo - vout ( + ) load input source vin ( - ) s ense ( - ) s ense ( + ) vout ( - ) vin ( + ) r esist ance of trace r esist ance of trace ? ? ? ? ? ? ? ? ? ? ? ? k down rtrim 2 . 10 511 _ ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? k k down rtrim 9 . 40 2 . 10 10 511 _ free datasheet http:///
ds_ E48SD12020 _ 0 704 2013 e - mail : dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 12 figure 19 : circuit configura tion for trim - up (increase output voltage) i f the external resistor is connected between the trim and vo ( + ) the output voltage set point increases (fig.19) the extern al resistor value require d to obtain a percentage output voltage change % is defined as : ex. when trim - up +10% (1 1.7 v1.1=1 2.87 v) care should be taken to ensure that the maximum output power of the module remains at or below the maximum rated power. note1: see the last page. power good, pg the module provide s a power good (pg) signal which is provided by the ic inside module, voltage level 3.3v, to indicate that the output voltage is within the normal output voltage range of the power module. the pg signal will be de - asserted to a low st ate if any condition such as overtemperature, overcurrent or loss of regulation occurs that would result in the output voltage going below the normal voltage range value. the vin pg function could be changed via pmbus. the commond related to vin ovp funct ion are power_good_on and power_good_off. ? ? ? ? ? ? ? ? ? ? k up rtrim 2 . 10 511 1.225 ) (100 vo 11 . 5 _ ? ? ? ? ? ? ? ? ? ? ? k up rtrim 6 . 475 2 . 10 10 511 10 225 . 1 ) 10 100 ( 7 . 1 1 11 . 5 _ free datasheet http:///
ds_ E48SD12020 _ 0 704 2013 e - mail : dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 13 thermal consideratio ns thermal management is an important part of the system design. to ensur e proper, reliable operation, sufficient cooling of the power module is needed over the entire temperature range of the module. convection cooling is usually the dominant mode of heat transfer. hence, the choice of equipment to characterize the thermal pe rformance of the power module is a wind tunnel. thermal testing setup deltas dc/dc power modules are characterized in heated vertical wind tunnels that simulate the thermal environments encountered in most electronics equipment. this type of equipment c ommonly uses vertical ly mounted circuit cards 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 win d tunnel. the space between the neighboring pwb and the top of the power module is constantly kept at 6.35mm (0.25). figure 20 : wind tunnel test setup thermal derating heat can be removed by increasing airflow over the module. to enhance system relia bility, 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. thermal curves (with out heat spreader) figure 2 1 : * hot spot 1 temperature measured point, t he allowed maximum hot spot 1 temperature is defined at 1 14 figure 2 2 : output current vs. ambient temperature and air velocity @vin=48v(transverse orientation, airflow from vin - to vin + ,without heat spreader) air flow module pwb 50.8(2.00") air velocity and ambient temperature sured below the module fancing pwb note: wind tunnel test setup figure dimensions are in millimeters and (inches) ntc resistor airflow hot spot 1 0 4 8 12 16 20 25 30 35 40 45 50 55 60 65 70 75 80 85 output current(a) ambient temperature ( ) E48SD12020(standard) output current vs. ambient temperature and air velocity @vin = 48v (transverse orientation) natural convection 100lfm 200lfm 300lfm 600lfm 500lfm 400lfm free datasheet http:///
ds_ E48SD12020 _ 0 704 2013 e - mail : dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 14 digital feature desc riptions the module has a digital pmbus interface to allow the module to be monitored, controlled and configured by th e system. the module supports 4 pmbus signal lines, data, c loc k, smbalert (optional), control (c2 pin, optional), and 2 address line addr0 and addr1. more detail pmbus informatio n can be found in the pmb power management protocol specification, part i and part ii, revision 1.2 ; which is shown in http://pmbus.org . both 100khz and 400khz bus speeds are supported by the module. connection f or the pmbus interface should be following the high power dc specifications given in section 3.1.3 in the smbus specification v2.0 or the low power dc specifications in section 3.1.2. the complete smbus specification is shown in http://smbus.org . t he module support s t he packet error checking (pec) protocol. it can check the pec byte provided by the pmbus master, and include a pec byte in all message responses to the master. and the module also can communicate with the mast er that does not implement the pec mechanism. smbalert protocol is also supported by the module. smbalert line is also a wired - and signal; by which the module can alert the pmbus master via pulling the smbalert pin to an active low. there are only one way that the master and the module response to the alert of smbalert line. this way is for the module used in a system that does not support alert response address (ara). the module is to retain its resistor programmed address, when it is in an alert active condition. the master will communicate with the slave module using the programmed address, and using the various read_status commands to find who cause for the smbalert. the clear_faults command will clear the smbalert. thermal curves (with heat spreader) figure 2 3 : * hot spot temperature measured point, t he allowed maximum hot spot tempe rature is defined at 1 0 2 figure 2 4 : output current vs. ambient temperature and air velocity @vin=48v(transverse orientation, airflow from vin - to vin + ,with heat spreader) airflow 22.2mm 11.3mm (0.87") (0.44") 0 4 8 12 16 20 25 30 35 40 45 50 55 60 65 70 75 80 85 output current(a) ambient temperature ( ) E48SD12020(standard) output current vs. ambient temperature and air velocity @vin = 48v (transverse orientation,with heatspreader) natural convection 100lfm 200lfm 300lfm 400lfm 600lfm 500lfm free datasheet http:///
ds_ E48SD12020 _ 0 704 2013 e - mail : dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 15 the module contains a data flash used to store configuration settings, which will not be programmed into the device data f lash automatically. the store_default_all command must be used to commit the current settings are transfer from ram to data flash as device defaults. pmbus addressing the module has flexible pmbus addressing capability. when connect different resistor fr om addr0 and addr1 pin to gnd pin, 64 possible addresses can be acquired. the address is in the form of octal digits; each pin offer one octal digit, and then combine together to form the decimal address as shown in below. address = 8 * addr1 + addr0 corresponded to each octal digit, the requested resistor values are shown in below, and +/ - 1 % resistors accuracy can be accepted. if there is any resistances exceeding the requested range, address 127 will be return. 0 - 12 and 40, 44, 45, and 55 in decimal address cant be used, since they are reserved according to the smbus specifications, and which will also return address 127. pmbus data format the module receives and report date in linear format. the exponent of the data words is fixed at a reasonable value for the command; altering the exponent is not supported. direct format is not supported by the module. for commands that set or report any voltage thresholds related to the output voltage, the module supports the linear data format consisting of a two byte value with a 16 - bit, unsigned mantissa, and a fixed exponent of - 12. the format of the two data bytes is shown below: the equation can be written as: vout = mantissa x 2 ( - 12) for example, considering set vout to 12v by vout_command, the read/write data can be calcu lated refer to below process: mantissa =vout/ 2 ( - 12) = 12 / 2 ( - 12) =4 9152 ; converter the calculated mantissa to hexa decimal 0x c000 . free datasheet http:///
ds_ E48SD12020 _ 0 704 2013 e - mail : dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 16 for commands that set or report all other thresholds, including input voltages, output curre nt, temperature, time and frequency, the supported linear data format is a two byte value with: an 11 bit, twos complement mantissa , and a 5 bit, twos complement exponent (scaling factor).the format of the two data bytes is shown as in below. the eq uation can be written as: value = mantissa x 2 (exponent) for example, considering set the turn on threshold of input under voltage lockout to 34v by vin_on command; the read/write data can be calculated refer to below process: get the exponent of vin, - 3; whose binary is 11101 mantissa =v in /2 ( - 3 ) = 34/ 2 ( - 3 ) =272; converter the calculated mantissa to hexadecimal 110, then converter to binary 00100010000;combine the exponent and the mantissa, 11101 and 001000 10000; converter binary 1110100100010000 to hexadecim al e910. free datasheet http:///
ds_ E48SD12020 _ 0 704 2013 e - mail : dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 17 supported pmbus comm ands the main p mbus commands described in the pmbus 1.2 specification are supported by the module. partial pmbus commands are fully supported; partial pmbus commands have difference with the definition in pmbus 1.2 specification. all the supported pmbus commands are deta il summarized in below table command command code c o mmand description transf - er type compatible with standard pmbus or not? data format default value range limit data units expon - ent note operation 0x01 turn the module on or off by pmbus command r/w by te refer to below description; bit field 0x80 / / / / on_off_config 0x02 configures the combination of primary on/off pin and pmbus command r ead byte yes bit field 0x1d / / / 0x1d (neg logic); 0x1f (pos logic); clear_faults 0x03 clear any fault bits th at have been set send byte yes / / / / / / store_default_all 0x11 stores operating parameters from ram to data flash send byte yes / / / / / this command is effective to the parameter of all command in this table. restore_default_all 0x12 restores operat ing parameters from data flash to ram send byte yes / / / / / this command can't be issued when the power unit is running. vout_mode 0x20 read vo data format read byte yes mode+exp 0x14 / / / / vout_command 0x21 set the output voltage normal value r/w w ord yes vout linear 12 8 ~13. 2 volts - 12 / vout_ margin_high 0x2 5 set the output voltage margin high value r/w word yes vout linear 12.6 <13.0 volts - 12 / vout_ margin_low 0x2 6 set the output voltage margin low value r/w word yes vout linear 11.4 >10.2 vol ts - 12 / frequency_switch 0x33 set the switching frequency r/w word yes frequency linear 175 140 ~ 180 khz - 2 / free datasheet http:///
ds_ E48SD12020 _ 0 704 2013 e - mail : dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 18 command command code c o mmand description transf - er type compatible with standard pmbus or not? data format default value range limit data units expon - ent note vin_on 0x35 set the turn on voltage threshold of vin under voltage lockout r/w word yes vin linear 3 5 33~ 36 v - 3 vin_on should be higher than vin_off vin_off 0x36 set the turn off voltage threshold of vin under voltage lockout r/w w ord yes vin linear 3 3 3 1 ~ 34 v - 3 vin_on should be higher than vin_off vout_ov_fault_l imit 0x40 set the output overvoltage fault threshold. r/w word yes vout linear 15 1 1 ~ 16 v - 12 must be higher than the value of vout_command and vout_ov_warn_limit; vout _ov_fault_ response 0x41 instructs what action to take in response to an output overvoltage fault. read byte refer to below description; bit field 0xb8 / n/a / / vout_ov_warn_l imit 0x42 set a threshold causing an output voltage high warning. r/w word yes v out linear 15 11~16 v - 12 must be the same or less than vout_ov_fault_limit value iout_oc_fault_li mit 0x46 set the output overcurrent fault threshold. r/w word yes iout linear 32 20~35 a - 4 must be greater than iout_oc_warn_limit value iout_oc_fault_r esp onse 0x47 instructs what action to take in response to an output overcurrent fault. read byte refer to below description; bit field 0xf8 / n/a / / iout_oc_warn_li mit 0x4a set a threshold causing an output current high warning. r/w word yes iout linear 27 20 ~ 25 a - 4 must be less than iout_oc_fault_limit value ot_fault_limit 0x4f set the over temperature fault threshold. r/w word yes temp linear 1 25 25~ 14 0 deg. c - 2 must be greater than ot_warn_limit value ot_fault_respo nse 0x50 instructs what action to tak e in response to an over temperature fault. read byte refer to below description; bit field 0x 80 / n/a / / free datasheet http:///
ds_ E48SD12020 _ 0 704 2013 e - mail : dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 19 command comman d code c o mmand description transf - er type compatible with standard pmbus or not? data format default value range limit data units expon - ent note ot_warn_ limit 0x51 set a threshold causing a temperature high warning. r/w word yes temp linear 100 25~140 deg.c - 2 must be less than ot_fault_li mit value vin_ov_fa ult_limit 0x55 set the input overvoltage fault threshold. r/w word yes vin linear 110 48~110 v - 3 / v in _ov_fa ult_respo nse 0x 56 instructs what action to take in response to an in put overvoltage fault. read byte refer to below description; bit field 0x c0 / n/a / / power_go od_on 0x5e sets the output voltage at which the bit 3 of status_word high byte should be asserted. r/w word yes vout linear 11 8 ~13 .2 v - 12 must be greater than power_goo d_off value power_go od_off 0x5f sets the output voltage at which the bit 3 of status_word high byte should be negated. r/w word yes vout lin ear 9 8 ~1 3 .2 v - 12 must be less than power_goo d_on value ton_delay 0x60 sets the time from a start condition is received until the output voltage starts to rise r/w word yes time linear 20 5~500 ms - 1 / ton_rise 0x61 sets the time from the output starts to rise until the voltage has entered the regulation band. r/w word yes time linear 20 15~500 ms - 1 / status_w ord 0x79 returns the information with a summary of the module's fault/warning read word refer to below description; bit field / / / / / status_ vo ut 0x7a returns the information of the module's output voltage related fault/warning read byte refer to below description; bit field / / / / / status_io ut 0x7b returns the information of the module's output current related fault/warning read byte refer to below description; bit field / / / / / free datasheet http:///
ds_ E48SD12020 _ 0 704 2013 e - mail : dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 20 command comman d code c o mmand description transf - er type compatible with standard pmbus or not? data format default value range limit data units expon - ent note status_in put 0x7c returns the information of th e module's input over voltage and under voltage fault read byte refer to below description; bit field / / / / / status_te mperatur e 0x7d returns the information of the module's temperature related fault/warning read byte refer to below description; bit fie ld / / / / / status_cm l 0x7e returns the information of the module's communication related faults. read byte refer to below description; bit field / / / / / read_vin 0x88 returns the input voltage of the module read word yes vin linear / / v - 3 / read_v ou t 0x8b returns the output voltage of the module read word yes vout linear / / v - 12 / read_iout 0x8c returns the output current of the module read word yes iout linear / / a - 4 / read_tem perature_ 1 0x8d returns the module's hot spot temperature of the module read word yes temp linear / / deg.c - 2 / pmbus_re vision 0x98 reads the revision of the pmbus read byte yes bit field 0 x12 / / / / mfr_c1_c2 _ara_conf ig 0xe0 config c2 pin function r/w byte refer to below description; bit field 0x00 / / / / mfr_ c2 _ configure 0xe1 config c2 pin logic r/w byte refer to below description; bit field 0x00 / / / / mfr_pgoo d _polarity 0xe2 config power good logic r/w byte refer to below description; bit field 0x01 / / / / mfr_seria l 0x9e reads the sn of module read blo ck / total 11 ascii charact ers xxxxxxxxx xx / / / the sn number of module use 11 ascii characters free datasheet http:///
ds_ E48SD12020 _ 0 704 2013 e - mail : dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 21 operation [0x01] bit number purpose bit v alue meaning default settings 0x80 7: enable/disable the module 1 output is enabled 1 0 output is disabl ed 6: reserved 0 5:4 margins 00 no margin 00 01 margin low (act on fault) 10 margin high (act on fault) 3:0 reserved 0000 vout_ov_fault_response [0x41] bit number purpose bit v alue meaning default settings 0xb8 7:6 response setting s 10 u n it shuts down and responds according to the retry settings 10 5:3 retry setting 111 unit continuously restarts while fault is present until commanded off 111 000 unit does not attempt to restart on fault 2:0 delay time setting 000 no delay supported 000 iout_oc_fault_response [0x47] bit number purpose bit v alue meaning default settings 0xf8 7:6 response setting s 1 1 u nit shuts down and responds according to the retry settings 11, 5:3 retry settings 111 unit continuously restarts while fault is present until commanded off 111 000 unit does not attempt to restart on fault 2:0 delay time setting 000 no delay supported 000 ot_fault_response [0x50] bit number purpose bit v alue meaning default settings 0x80 7:6 response setting s 1 0 u nit shuts down and responds according to the retry settings 10, 5:3 retry settings 111 unit continuo usly restarts while fault is present until commanded off 000 000 unit does not attempt to restart on fault 2:0 delay time setting 000 no delay supported 000 free datasheet http:///
ds_ E48SD12020 _ 0 704 2013 e - mail : dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 22 v in _ov_fault_response [0x 56 ] bit number purpose bit v alue meaning default settings 0xc0 7 :6 response setting s 1 1 u nit shuts down and responds according to the retry settings 11 5:3 retry setting 111 unit continuously restarts while fault is present until commanded off 000 000 unit does not attempt to restart on fault 2:0 delay time sett ing 000 no delay supported 000 status_word [0x79] high byte bit number purpose bit v alue meaning 7 an output over voltage fault or warning 1 occurred 0 no occurred 6 an output over current fault or warning 1 occurred 0 no occurred 5 an input vol tage fault, including over voltage and undervoltage 1 occurred 0 no occurred 4 reserved 3 power_good 1 is negated 0 ok 2:0 reserved low byte bit number purpose bit v alue meaning 7 reserved 6 o ff (the unit is not providing po wer to the output, regardless of the reason) 1 occurred 0 no occurred 5 an output over voltage fault 1 occurred 0 no occurred 4 an output over current fault 1 occurred 0 no occurred 3 an input under voltage fault 1 occurred 0 no occurred 2 a temperature fault or warning 1 occurred 0 no occurred 1 cml ( a communications, memory or logic fault 1 occurred 0 no occurred 0 reserved free datasheet http:///
ds_ E48SD12020 _ 0 704 2013 e - mail : dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 23 status_vout [0x7a] bit number purpose bit v alue meaning 7 output o ver voltage fault 1 occurred 0 no occurred 6 output o ver voltage warning 1 occurred 0 no occurred 5:0 reserved status_iout [0x7b] bit number purpose bit v alue meaning 7 output o ver current fault 1 occurred 0 no occurred 6 reserved 5 output o ver current warning 1 occ urred 0 no occurred 4:0 reserved status_input [0x7c] bit number purpose bit v alue meaning 7 input o ver voltage fault 1 occurred 0 no occurred 6: 5 reserved 4 input under voltage fault 1 occurred 0 no occurred 3:0 reserved status _temperature [0x7d] bit number purpose bit v alue meaning 7 over temperature fault 1 occurred 0 no occurred 6 over temperature warning 1 occurred 0 no occurred 5:0 reserved status_cml [0x7e] bit number purpose bit v alue meaning 7 invalid/u nsupported command received 1 occurred 0 no occurred 6 invalid/unsupported dat a received 1 occurred 0 no occurred 5 packet error check failed 1 occurred 0 no occurred 4:0 reserved free datasheet http:///
ds_ E48SD12020 _ 0 704 2013 e - mail : dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 24 mfr_c1_c2_ara_config [0xe0] bit number purpose bit v alue meaning 7:5 reserved 000 reserved 4 ara 0 ara not functional, module remains at resistor programmed address when smblaert is asserted 3:0 pin configuration 0000 c2 pin: power_good 0010 c2 pin: on/off (secondary) mfr_ c2_configure [0xe1] bit numbe r purpose bit v alue meaning 7:2 reserved 000000 reserved 1 on/off configuration 0 secondary side on/off pin state when mapped to c2 is ignored 1 and C primary and secondary side on/off 0 secondary side on/off logic 0 negative logic (low enable: input < 0.8v wrt vout( - ) 1 positive logic (high enable: input > 2.0v wrt vout( - ) mfr_pgood_polarity [0xe2] bit number purpose bit v alue meaning 7:1 reserved 0000000 reserved 0 power good logic 0 negative pgood logic 1 positive pgood logic free datasheet http:///
ds_ E48SD12020 _ 0 704 2013 e - mail : dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 25 mechanical drawing (with heat - spreader) * for modules with through - hole pins and the optional heat spreader, they are intended for wave soldering assembly onto system boards, please do not subject such modules through reflow temperature profi le. free datasheet http:///
ds_ E48SD12020 _ 0 704 2013 e - mail : dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 26 mechanical drawing (without heat - spreader) pin specification: pins 1 - 3, 5 - 7 1.00mm (0.040) diameter (all pins are copper with matte tin plating over nickel under plating ) pins 4,8 2. 1.50 mm (0.0 59 ) diameter (all pins are copper with matte ti n plating over nickel under plating ) pins 9 - 15 1. sq 0.50mm(0.020) ( all pins are copper with gold flash plating) 2. free datasheet http:///
ds_ E48SD12020 _ 0 704 2013 e - mail : dcdc @ d elta.com.tw http://www.deltaww.com/dcdc p 27 part numbering syste m e 48 s d 120 2 0 n r f h form factor input voltage number of outputs product s e ries output voltage output current o n/off logic pin length option code e - eighth brick 48 - 3 8 v~75v s C single d - digital control 120 C 11.7 v 20 - 2 0 a n C negative p - positive n C 0.14 5 r C 0.170 k C 0.110 f - rohs 6/6 (lead free) pmbus pin(9~15pin) heat spreader a yes n o b no no c no yes h yes yes model list model name input output eff @ 100%load e48sd1202 0 nrf h 3 8 v~ 75 v 7 a 1 1.7 v 20 a 9 5 . 6 % * for modules with through - hole pi ns and the optional heat sink , they are intended for wave soldering assembly onto system boards; please do not subject such modules through reflow temperature profile. note1: if use vout_command of pmbus to trim vo ut set point, then the function of trim pin(6 pin) will be disable d immediately . and if n eed enable the function of trim pin(6pin) to trim vo ut set point again , should turn off and turn on the input voltage of module to restart module . contact : www.deltaww.com/dcdc usa: telephone: east coast: 978 - 656 - 3993 west coast: 510 - 668 - 5100 fax: (978) 656 3964 email: dcdc@delta - corp.com europe: phone: +31 (0)20 655 09 67 fax: +31 (0)20 655 09 99 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. i nformation 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 othe rwise under any patent or patent rights of delta. delta reserves the right to revise these specifications at any time, without notice . free datasheet http:///

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