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sensitron semiconductor technical data datasheet 5186 , rev - ?2010 sensitron semiconductor ? 221 west industry court ? deer park, ny 11729-4681 phone (631) 586 7600 fax (631) 242 9798 ? www.sensitron.com ? sales@sensitron.com ? page 1 spdpxxd28-1 series programmable dc solid state power controller module description: these solid state power controller (sspc) modules are designed to operate without any heatsink requirements. they are mi crocontroller-based solid state relays ra ted up to 30a designed to be used in high reliability 28v dc applications. these modules have in tegrated current sensing with no derating over the full operating temperature range. these modules are the el ectronic equivalent to electromechanical circuit breakers with isolated control and stat us. this series is supplied in 6 sspc families, with each family being programmable over a 5:1 current range. spdp05d28-1: programmable from 1a to 5a spdp10d28-1: programmable from 2a to 10a spdp15d28-1: programmable from 3a to 15a spdp20d28-1: programmable from 4a to 20a SPDP25D28-1: programmable from 5a to 25a spdp30d28-1: programmable from 6a to 30a compliant documents & standards: mil-std-1275b, notice1 characteristics of 28 volt dc electrical systems in military vehicles-4/20/04 mil-std-704f aircraft electrical power characteristics 12 march 2004 mil-std-217f, notice 2 reliability prediction of electronic equipment 28 feb 1995 module features: ? no additional heat sinking or external cooling required! ? extremely low power, no derati ng over the full temperature range ? low weight (30 grams) ? same pin out as industry st andard sspcs in a smaller outline ? epoxy shell construction ? solid state reliability ? high power density electrical features (spdpxxd28-1 series): ? 28vdc input with very low voltage dr op; 45mv, typ. @15a for SPDP25D28-1 ? true i 2 t protection up to 10x rating with nuisance trip suppression ? instant trip protection (100 sec typ) for loads above 10x rating ? unlimited interrupt capability; repetitive fault handling capability ? thermal memory ? internally generated isolated supply to drive the switch ? low bias supply current: 60 ma typ @ 5v dc ? high control circuit isolation: 750v dc control to power circuit ? soft turn-on to reduce emc issues ? emi tolerant ? module reset with a low level signal; reset circuit is trip-free ? ttl/cmos compatible, digitally isolated, input and outputs ? input filter for noise immunity
sensitron semiconductor technical data datasheet 5186 , rev - ?2010 sensitron semiconductor ? 221 west industry court ? deer park, ny 11729-4681 phone (631) 586 7600 fax (631) 242 9798 ? www.sensitron.com ? sales@sensitron.com ? page 2 spdpxxd28-1 series table 1 - electrical characteristics (at 25 o c and v bias = 5.0v dc unless otherwise specified) power input voltage ? continuous ? transient 0 to 40v dc, 55v dc absolute maximum +600v or ?600v spike (< 10 s) power dissipation see table 5 current see table 5 see figure 1, trip curve max voltage drop see table 5 max current without tripping 110% min trip time see figure 1, trip curve output rise time (turn on) 200 sec typ output fall time under normal turn-off 200 sec typ output fall time under fault 50 sec typ min load requirement nil protection short circuit protection unlimited instant trip 800%, min; 1200%, max table 2 - physical characteristics temperature operating temperature t a = -55 c to +100 c storage temperature t a = -55 c to +125 c environmental altitude up to 30,000 ft can be installed in an unpressurized area case dimensions 1.875 l x 1.125 w x 0.550 h operating orientation any weight 40 grams max mtbf (estimate: mil std 217f) 44 khrs @ 70 0 c ambient, full load, ground mobile control & status (ttl/cmos compatible) bias (vcc) 5.0v dc nominal, 6.5v dc absolute maximum 4.5v to 5.5 vdc bias (vcc) current 60 ma typ 85 ma, max gate status, load status signals v oh =4.6v min, at i oh =-4ma v ol =0.4v max, at i ol =4ma control signal v ih =2.0v min v il =0.8v max trip reset cycle control signal
sensitron semiconductor technical data datasheet 5186 , rev - ?2010 sensitron semiconductor ? 221 west industry court ? deer park, ny 11729-4681 phone (631) 586 7600 fax (631) 242 9798 ? www.sensitron.com ? sales@sensitron.com ? page 3 spdpxxd28-1 series figure 1 - trip curve
sensitron semiconductor technical data datasheet 5186 , rev - ?2010 sensitron semiconductor ? 221 west industry court ? deer park, ny 11729-4681 phone (631) 586 7600 fax (631) 242 9798 ? www.sensitron.com ? sales@sensitron.com ? page 4 spdpxxd28-1 series figure 2 - timing diagram table 3 - signal timing ? (-55 o c to 100 o c @ line = 28v dc) parameter symbol min ( s) max ( s) control to gate status delay for turn on t0 100 250 turn on delay t1 150 350 load current rise time t2 100 300 turn on to load status delay t3 300 500 control to gate status delay for turn off t4 100 300 turn off delay t5 200 500 load current fall time t6 150 300 turn off to load delay t7 150 350 note: current fall time from trip dependent on magnitude of overload
sensitron semiconductor technical data datasheet 5186 , rev - ?2010 sensitron semiconductor ? 221 west industry court ? deer park, ny 11729-4681 phone (631) 586 7600 fax (631) 242 9798 ? www.sensitron.com ? sales@sensitron.com ? page 5 spdpxxd28-1 series figure 3 - mechanical dimensions all dimensions are in inches table 4 - pin definitions pin number pin name function 1 bias +5v dc supply 2 gnd 5v return 3 gate status switch status 4 load status load current detection 5 control input on/off control 6 line +28v dc supply 7 gainret internally con nected to load (pin 10) 8 pwrgnd 28v return 9 gain gain adjust 10 load load connection
sensitron semiconductor technical data datasheet 5186 , rev - ?2010 sensitron semiconductor ? 221 west industry court ? deer park, ny 11729-4681 phone (631) 586 7600 fax (631) 242 9798 ? www.sensitron.com ? sales@sensitron.com ? page 6 spdpxxd28-1 series table 5 ? individual model ratings spdp05d28-1 spdp05d28-1 set for 1.0 amp rating spdp05d28-1 set for 2.5 amp rating spdp05d28-1 set for 5 amp rating current rating @ 100 o c 1.0a 2.5a 5a power dissipation (including control power) 0.26w typ @ 0.6a 25 o c 0.27w max @ 1a 25 o c 0.27w max @ 1a 100 o c 0.28w typ @ 1.5a 25 o c 0.34w max @ 2.5a 25 o c 0.35w max @ 2.5a 100 o c 0.38w typ @ 3a 25 o c 0.61w max @ 5a 25 o c 0.67w max @ 5a 100 o c max voltage drop 9mv typ @ 0.6a 25 o c 15mv max @ 1a 25 o c 17mv max @ 1a 100 o c 22mv typ @ 1.5a 25 o c 36mv max @ 2.5a 25 o c 42mv max @ 2.5a 100 o c 44mv typ @ 3a 25 o c 73mv max @ 5a 25 o c 83mv max @ 5a 100 o c spdp10d28-1 spdp10d28-1 set for 2.0 amp rating spdp10d28-1 set for 5 amp rating spdp10d28-1 set for 10 amp rating current rating @ 100 o c 2.0a 5a 10a power dissipation (including control power) 0.26 w typ @ 1.2a 25 o c 0.29w max @ 2a 25 o c 0.30w max @ 2a 100 o c 0.34w typ @ 3a 25 o c 0.49w max @ 5a 25 o c 0.54w max @ 5a 100 o c 0.59w typ @ 6a 25 o c 1.20w max @ 10a 25 o c 1.42w max @ 10a 100 o c max voltage drop 11mv typ @ 1.2a 25 o c 19mv max @ 2a 25 o c 23mv max @ 2a 100 o c 29mv typ @ 3a 25 o c 48mv max @ 5a 25 o c 58mv max @ 5a 100 o c 57mv typ @ 6a 25 o c 95mv max @ 10a 25 o c 117mv max @ 10a 100 o c spdp15d28-1 spdp15d28-1 set for 3.0 amp rating spdp15d28-1 set for 7.5 amp rating spdp15d28-1 set for 15 amp rating current rating @ 100 o c 3.0a 7.5a 15a power dissipation (including control power) 0.27w typ @ 1.8a 25 o c 0.32w max @ 3a 25 o c 0.34w max @ 3a 100 o c 0.40w typ @ 4.5a 25 o c 0.67w max @ 7.5a 25 o c 0.79w max @ 7.5a 100 o c 0.86w typ @ 9a 25 o c 1.94w max @ 15a 25 o c 2.43w max @ 15a 100 o c max voltage drop 14mv typ @ 1.8a 25 o c 23mv max @ 3a 25 o c 29mv max @ 3a 100 o c 34mv typ @ 4.5a 25 o c 56mv max @ 7.5a 25 o c 73mv max @ 7.5a 100 o c 68mv typ @ 9a 25 o c 113mv max @ 15a 25 o c 145mv max @ 15a 100 o c spdp20d28-1 spdp20d28-1 set for 4.0 amp rating spdp20d28-1 set for 10 amp rating spdp20d28-1 set for 20 amp rating current rating @ 100 o c 4.0a 10a 20a power dissipation (including control power) 0.28w typ @ 2.4a 25 o c 0.33w max @ 4a 25 o c 0.35w max @ 4a 100 o c 0.44w typ @ 6a 25 o c 0.78w max @ 10a 25 o c 0.90w max @ 10a 100 o c 1.01w typ @ 12a 25 o c 2.35w max @ 20a 25 o c 2.87w max @ 20a 100 o c max voltage drop 13mv typ @ 2.4a 25 o c 21mv max @ 4a 25 o c 26mv max @ 4a 100 o c 32mv typ @ 6a 25 o c 53mv max @ 10a 25 o c 65mv max @ 10a 100 o c 63mv typ @ 12a 25 o c 105mv max @ 20a 25 o c 131mv max @ 20a 100 o c
sensitron semiconductor technical data datasheet 5186 , rev - ?2010 sensitron semiconductor ? 221 west industry court ? deer park, ny 11729-4681 phone (631) 586 7600 fax (631) 242 9798 ? www.sensitron.com ? sales@sensitron.com ? page 7 spdpxxd28-1 series SPDP25D28-1 SPDP25D28-1 set for 5.0 amp rating SPDP25D28-1 set for 12.5 amp rating SPDP25D28-1 set for 25 amp rating current rating @ 100 o c 5.0a 12.5a 25a power dissipation (including control power) 0.29w typ @ 3a 25 o c 0.36w max @ 5a 25 o c 0.39w max @ 5a 100 o c 0.49w typ @ 7.5a 25 o c 0.92w max @ 12.5a 25 o c 1.12w max @ 12.5a 100 o c 1.13w typ @ 15a 25 o c 2.84w max @ 25a 25 o c 3.64w max @ 25a 100 o c max voltage drop 13mv typ @ 3a 25 o c 21mv max @ 5a 25 o c 28mv max @ 5a 100 o c 32mv typ @ 7.5a 25 o c 53mv max @ 12.5a 25 o c 69mv max @ 12.5a 100 o c 64mv typ @ 15a 25 o c 107mv max @ 25a 25 o c 139mv max @ 25a 100 o c spdp30d28-1 spdp30d28-1 set for 6.0 amp rating spdp30d28-1 set for 15 amp rating spdp30d28-1 set for 30 amp rating current rating @ 100 o c 6.0a 15a 30a power dissipation (including control power) 0.31w typ @ 3.6a 25 o c 0.40w max @ 6a 25 o c 0.45w max @ 6a 100 o c 0.60w typ @ 9a 25 o c 1.21wmax @ 15a 25 o c 1.50w max @ 15a 100 o c 1.63w typ @ 18a 25 o c 4.08w max @ 30a 25 o c 5.24w max @ 30a 100 o c max voltage drop 15mv typ @ 3.6a 25 o c 26mv max @ 6a 25 o c 33mv max @ 6a 100 o c 38mv typ @ 9a 25 o c 64mv max @ 15a 25 o c 83mv max @ 15a 100 o c 77mv typ @ 18a 25 o c 129mv max @ 30a 25 o c 166mv max @ 30a 100 o c figure 5 - electrical block diagram
sensitron semiconductor technical data datasheet 5186 , rev - ?2010 sensitron semiconductor ? 221 west industry court ? deer park, ny 11729-4681 phone (631) 586 7600 fax (631) 242 9798 ? www.sensitron.com ? sales@sensitron.com ? page 8 spdpxxd28-1 series description figure 5 shows the block diagram of the spdpxxd28-1 series. it uses a lo w-power triple channel digital isolator si8431 device for digital i/o. these are cmos devices that employ an rf coupler to transmit digital information across an isolation barrier. very high speed operation at low power levels is achieved. the operation of a si8431 channel is analogous to that of an opto coupler, except an rf carrier is modulated instead of light. this simple architecture provides a robust is olated data path and requires no special considerations or initialization at start-up. a channel consists of an rf transmitter and rf receiver separated by a semiconductor-based isolation barrier. transmitter input modulates the carrier provided by an rf oscillator using on/off keying. the receiver contains a demodulat or that decodes the input st ate according to its rf energy content and applies the result to the output via the output driver. this rf on/off keying scheme is superior to pulse code schemes as it provides best-in- class noise immunity, low power consumption, and better immunity to magnetic fields. the block labeled ?control & protection circuitry? gets po wer from the dc-dc converter and is referenced to the output of the sspc . this block contains an amplifier to gain up the voltage developed across the sense resistor. it also contains a microcontroller with on-b oard timers, a/d converter, clock generator and independent watchdog timer. the microcontroller implements a precision i 2 t protection curve as well as an instant trip function to protect the wiring and to protect itself. it per forms all of the functions of multiple analog comparators and discrete logic in one high-reliability component. the ?control & protection ci rcuitry? block also has the ability to adjus t the current rating of each model of the spdpxxd28-1 series over a 5:1 range. if the ?gain? term inal is left open, the sspc will be set for maximum rating. if the ?gain? terminal is c onnected directly to the ?g ain return? terminal, the sspc will be set for 1/5 of the maximum rating. furthermore, a resistor connect ed between the ?gain? terminal and the ?gain return? terminal will set a rating between maximum and 1/5 of maximum. see figure 10 for the relationship between rating and resistor value. the code programmed in the microcontroller acquires the output of the internal a/d converter, squares the result and applies it to a simulated rc circuit. it checks the output of the simulated circuit to determine whether or not to trip (turn off the power mosfets). beca use the microcontroller simulates an analog rc circuit, the sspc has ?thermal memory?. that is, it trips faster if there had been current flowing prior to the overload than if there hadn?t been current flowing. this behavior imitat es thermal circuit breakers and better protects the application?s wiring since the wiring cannot take as much an overload if current had been flowing prior to the overload. the watchdog timer operates from its own intern al clock so a failure of the ma in clock will not stop the watchdog timer. the code programmed in the mi crocontroller will periodically reset the watchdog timer preventing it from timing out. if the code malfunctions for any reason, the watchdog timer is not reset and it times out. when the watchdog timer times out, it resets the microcontroller. since the code is designed to detect levels and not edges, the output of the module, and therefore the output of the spd pxxd28-1, immediately reflects the command on its input. the power mosfets used in the spdpxxd28-1 series have been selected for very low r ds(on) and results in low voltage drop and low power dissipatio n. in most applications, the spd pxxd28-1 will be operat ed at 50 ? 60% of rated current to provide a safety margin. as can be seen in table 1, when the SPDP25D28-1 is operated at 15 amps, 60% of rated current, it only dissipates 1.0 watt at room temperature. no heat sinking is required for this condition. however, if the SPDP25D28-1 is to be operated at maximum rating and/or at elevated temperatures, the dissipation can exceed 4 watts and heat sinking is required. some heat sinking can be accomplished by adding copper area to the line and load pins, a heatsink can be epoxy attached to the surface of the module or a flat copper or alumin um heatsink can be sandwiched between the SPDP25D28-1 and the printed circuit board using a thermal pad to maximize heat transfer. each application should be evaluated at maximum expected const ant current. the lower current models in the spdpxxd28-1 series do not require heat sinking under all conditions.
sensitron semiconductor technical data datasheet 5186 , rev - ?2010 sensitron semiconductor ? 221 west industry court ? deer park, ny 11729-4681 phone (631) 586 7600 fax (631) 242 9798 ? www.sensitron.com ? sales@sensitron.com ? page 9 spdpxxd28-1 series for overloads, no heat sinking is required provided the spdpxxd28-1 series is allowed some time to cool down. the spdpxxd28-1 has sufficien t thermal mass that the temperature will rise only a few degrees under the worst-case overload. repetiti ve overloads should be avoided. when the spdpxxd28-1 reports a trip condition, the controller driving the spdpxxd28-1 shoul d allow no more than four repetitions and then allow thirty seconds to cool down before trying to turn on again. the spdpxxd28-1 will trip on overlo ads in the always trip region show n in figure 1 and will never trip when in the never trip region. the spdpxxd28-1 can be reset by bringing the control pin to a logic low. when the control pin is br ought back to logic high, the spdpxxd 28-1 will turn back on. if the overload is still present, the spdpxxd28-1 will trip again. cycling the 5 volt bias power will also reset the spdpxxd28-1. if the control pin is at logic high when the bias power is cy cled, the spdpxxd28-1 will turn back on when the bias power is re-applied. status outputs the load and gate status outputs of the spdpxxd28-1 show whether or not the load is drawing current and power mosfet switch is on. a logic high on the load status output show s that the load draws < 5% of rated load and a logic low shows that the load draws > 15% of rated current. a load that draws between 5% and 15% of rated current could result in either a high or low logic level on the load status output. logic high on the gate output indicates that the power mosfet switch is on while a logic low indicate s that the switch is off. as can be seen in table 6, of the 8 possible states for the combination of control, load and gate, only 3 states represent valid sspc operation. the other 5 states indicate either a failed sspc or, more likely, a short to ground or a short to the bias supply of one of the l ogic outputs. by comparing the control input with the load and gate outputs, the user can determine whet her or not the load is supposed to be on (gate), whether or not it?s drawing current (gate) and whether or not the load and gate outputs are valid responses to the control input. table 6 ? control, load & gate truth table state control load gate comments 1 l l l sspc failure or shor ted load output to ground 2 l l h sspc failure 3 l h l normal off condition 4 l h h sspc failure or shorted gate output to bias supply 5 h l l sspc failure or shor ted gate output to ground 6 h l h normal on condition with load current > 15% rated current 7 h h l tripped 8 h h h normal on condition with load current < 5% rated current wire size mil-w-5088l has a chart the shows wire size as a functi on of wire temperature and current. this chart is for a single copper wire in free air. for an ambient temperature of 70 o c, the chart allows an 18-gauge wire to handle 25 amps continuously at a wire temperature of 200 o c ? a wire temperature rise of 130 o c. for a wire temperature limited to 150 o c, the chart requires a 16-gauge wire and for a wire temperature of 105 o c, the chart requires a 14-gauge wire. amendment 1 of mil-w-5088l has a table for copper wire in a bundle, group or harness with condition on the number of wires, percent of total harne ss capacity, etc. this table shows that a 12 gauge wire is necessary for 200 o c operation, 10-gauge for 150 o c and 8-gauge for 105 o c.
sensitron semiconductor technical data datasheet 5186 , rev - ?2010 sensitron semiconductor ? 221 west industry court ? deer park, ny 11729-4681 phone (631) 586 7600 fax (631) 242 9798 ? www.sensitron.com ? sales@sensitron.com ? page 10 spdpxxd28-1 series mil-w-5088l has various figures showing derating for harne sses as a function of t he number of current carrying conductors for different altitudes. mil-w-5088l only specifies wire for dc or rms ac conditions, not for transient or overload conditions. mil-w-5088l and it s amendment should be consulted to determine minimum wire sizes for other currents and conditions. for transient or overload conditions, the transient or overload happens so quickly t hat heat is not transferred from the wire to the surrounding s. the heat caused by the i 2 r heating of the wire causes the temperature to rise at a linear rate controlled by the heat capacity of the wire. the equation for this linear rise in temperature, with respect to time, can be solved as: i 2 t = constant. every wire has an i 2 t rating that?s dependent on the temperature rise allowed and the diameter of the wire. if the i 2 t rating of the sspc or circuit breaker is less than the i 2 t rating of the wire, then the sspc or circuit breaker can protect the wire. the maximum i 2 t rating for the SPDP25D28-1 is 7.45 x 10 3 amp 2 -seconds. every wire size in the paragraphs above has an i 2 t rating that exceeds the SPDP25D28-1 i 2 t rating for the temperature rises stated. therefore, to select a wire size, it?s simply a matter of determining the maximum temperature ri se of the application and deciding whether or not the wire will be in a bundle and use the information above. similarly, the i 2 t ratings for the spdp12d28-1 and spdp05d28-1 are 1.72 x 10 3 amp 2 -seconds and 300 amp 2 -seconds, respectively. application connections the spdpxxd28-1 series may be configured as a high-side or low-side switch and may be used in positive or negative supply applications. figure 6 ? high-side switch, positive supply figure 6 shows the connections as a high-side switch with a positive power supply.
sensitron semiconductor technical data datasheet 5186 , rev - ?2010 sensitron semiconductor ? 221 west industry court ? deer park, ny 11729-4681 phone (631) 586 7600 fax (631) 242 9798 ? www.sensitron.com ? sales@sensitron.com ? page 11 spdpxxd28-1 series figure 7 ? low-side switch, positive supply figure 7 shows a low-side switch wi th a negative power supply. note that the pwrgnd pin is now connected to the line pin (see rise/fall time paragraph below for more information on the pwrgnd pin). figures 8 and figure 9 show negative supply high-side switch and low-side switch implementations. again, note the connection of the pwrgnd pin. figure 8 ? high side switch, negative supply
sensitron semiconductor technical data datasheet 5186 , rev - ?2010 sensitron semiconductor ? 221 west industry court ? deer park, ny 11729-4681 phone (631) 586 7600 fax (631) 242 9798 ? www.sensitron.com ? sales@sensitron.com ? page 12 spdpxxd28-1 series figure 9 ? low side switch, negative supply rise time & fall time the rise and fall times of the spdpxxd28-1 are pre-set at the factor y for a nominal 100 s with a line supply of 28vdc (see table 3 for min/max limits). the rise and fa ll times will vary linearly with supply voltage. the pwrgnd pin is used to control the rise and fall times. if the pwrgnd pin is left open, the rise and fall times will be about 50us. leaving the pwrgnd pin open can be useful when a faster rise or fall time is desirable. with the pwrgnd pin connected as in figures 6 through 9, the spdpxxd28-1, when set for a 25 amp rating, can turn on into a capacitive load of 440uf, min, 880uf, typ, without tripping for any power supply voltage within the ratings. the capacitive load capability is proportional to current rating and can be therefore easily calculated for each model and setting in the spdpxxd28-1 series. wiring and load inductance wiring inductance can cause voltage transients wh en the spdpxxd28-1 is switched off due to an overload. generally, these transients are small but must be consid ered when long wires are used on either the line or load pins or both. a 10 foot length of wire in free air will cause a transient voltage of about 10 volts when the SPDP25D28-1 trips at an instant trip level of 250 amps. at the rated load current of 25 amps, the voltage transient will be about 1 volt. if longer wire lengths are used, a transient suppressor may be used at the line pin and a power diode may be used at the load pin so t hat the total voltage between the line and load pins is less than 50 volts. when powering inductive loads, the negative voltage transient at the load pin can cause the voltage between line and load to exceed the spdpxxd 28-1 rating of 50 volts and a powe r diode from the load pin to ground must be used. the cathode of the power diode is connected to the load pin with the anode connected to ground. the power di ode must be able to carry the load current when the spdpxxd28-1 switches off. voltage transients due to wiring or load inductance are proportional to the operating current.
sensitron semiconductor technical data datasheet 5186 , rev - ?2010 sensitron semiconductor ? 221 west industry court ? deer park, ny 11729-4681 phone (631) 586 7600 fax (631) 242 9798 ? www.sensitron.com ? sales@sensitron.com ? page 13 spdpxxd28-1 series paralleling for example, putting two SPDP25D28-1s in parallel will not double the rating to 50 amps. due to differences in the r ds(on) of the power mosfets in the sspc s, the current will not share equally . in addition, there are unit-to- unit differences in the trip curves so that two spdp25d 28-1s in parallel may possibly trip at 35 amps. also, both SPDP25D28-1s will not trip together; the spdp25d28 ca rrying the higher current will trip first followed by the other SPDP25D28-1. multiple SPDP25D28-1s may be used in parallel as long as these complexities are appreciated. due not parallel different models of this series as the current sharing will not be predictable. board layout the current-carrying power circuit should be kept well away from the control circuit and other low-level circuits in the system. it?s unlikely, but possible, that magnetic coupling could affe ct the control circuit when turning normal loads on and off. however, in the case of an overl oad, the magnetic coupling c ould be 10 times greater than with normal loads. effect s of such coupling could cause ?chattering ? when turning on and off, oscillation, and the possibility of turning the spdpxxd28 -1 back on after an overload. the spdpxxd28-1 series is a trip-free device. once tripped it will not turn back on until re set and commanded on again. reset is accomplished by bringing the control pin low and turning the sspc bac k on is accomplished by bringing the control pin high. sufficient magnetic coupling between the current-ca rrying power circuit and the control circuit can negate the trip-free characteristic. mil-std-704f and mil-std-1275b these standards cover the characteristics of the elec trical systems in military aircraft and vehicles. the spdpxxd28-1 series meets all of the requirements of mil-std-704f including normal, emergency, abnormal and electric starting conditions with the ripple, dist ortion factor and distortion spectrum defined in the standard. the spdpxxd28-1 series also meets all of the requi rements of mil-std-1275b including operation with battery and generator, generator only and battery only for all of the conditions described in the standard including cranking, surges , spikes and ripple. in addition, t he spdpxxd28-1 series can withstand + 600 v spikes for 10 s. this capability is beyond that r equired by the standar ds cited above. figure 10 ? spdpxxd28-1 rating vs. ?gain? and ?gain return? terminals 0.00% 10.00% 20.00% 30.00% 40.00% 50.00% 60.00% 70.00% 80.00% 90.00% 100.00% 10 100 1000 10000 100000 proramming resistor % of current rating
sensitron semiconductor technical data datasheet 5186 , rev - ?2010 sensitron semiconductor ? 221 west industry court ? deer park, ny 11729-4681 phone (631) 586 7600 fax (631) 242 9798 ? www.sensitron.com ? sales@sensitron.com ? page 14 spdpxxd28-1 series ordering information spdp xx d28-1 : xx is for maximum amps. for example, spdp0 5d28-1 is programmable from 1a to 5a. disclaimer: 1- the information given herein, including the specifications and dimens ions, is subject to change without prior notice to impr ove product characteristics. before ordering, purchas ers are advised to contact the sensitron semiconductor sales department for the latest version of the datasheet(s). 2- in cases where extremely high reliabilit y is required (such as use in nuclear power control, aerospace and aviation, traffic equipment, medical equipment , and safety equipment) , safety s hould be ensured by using semi conductor devices that featur e assured safety or by m eans of users? fail-safe precautions or other arrangement . 3- in no event shall sensitron semiconductor be liable for any dam ages that may result from an accident or any other cause duri ng operation of the user?s units according to the datas heet(s). sensitron semiconductor assumes no responsibility for any intellectual property claims or any other problems that may result from applications of info rmation, products or circuits described in the datasheets. 4- in no event shall sensitron semiconductor be liable for any fa ilure in a semiconductor device or any secondary damage result ing from use at a value exceeding the absolute maximum rating. 5- no license is granted by the datasheet(s ) under any patents or other rights of any th ird party or sensitron semiconductor. 6- the datasheet(s) may not be reproduced or duplicated, in any form, in whole or par t, without the expressed written permissio n of sensitron semiconductor. 7- the products (technologies) de scribed in the datasheet(s) are not to be provi ded to any party whose purpose in their applica tion will hinder maintenance of international peace and safety nor are they to be applied to that purpose by thei r direct purchasers or any thir d party. when exporting these products (technolog ies), the necessary procedures are to be taken in accordance with related laws and regulatio ns.

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