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filter/autoranging rectifier module up to 1000 watts s nrtl cus c us farm ? rev 6.7 vicorpower.com page 1 of 11 06/2015 800 927.9474 farmxxxx farm ? parameter rating unit notes l to n voltage 264 vac continuous 280 vac 100 ms +out to ? out voltage 400 vdc b ok to ? out voltage 16 vdc en to ? out voltage 16 vdc mounting torque 4 ? 6(0.45 ? 0.68) in-lbs (n-m) 6 each, 4-40 screw operating temperature ? 40 to 100 c h-grade storage temperature ? 55 to 125 c h-grade pin soldering temperature 500 (260) f (c) < 5 sec; wave solder 750 (390) f (c) < 7 sec; hand solder output current 3.5 a baseplate temperature 100 c features ? rohs compliant (with f or g pin style) ? emi filtering ? choice of 500 w or 750 w modules ? 96% efficiency ? autoranging 115/230 vac input ? microprocessor controlled ? inrush current limiting ? mini sized package ? power fail signal ? module enable product highlights the farm (filter/autoranging rectifier module) is an ac front-end module which provides emi filtering, autoranging line rectification and inrush current limiting. the farm is available in either 500/750 w or 750/1000 w models in a mini sized package measuring only 2.28" x 2.2" x 0.5". the farm interfaces directly with worldwide ac mains and may be used with vicor 300 v input dc-dc converters to realize an autoranging, high density, low profile switching power supply. the farm includes a microcontr oller that continuously monitors the ac line to control bridge / doubler operation. the user need only provide external capacitance to satisfy system hold-up requirements. vicor 2nd generation packaging technology offers flexible mounting options for various manufacturing processes. the farm may be installed as a conventional leaded device for onboard applications, inboard for low profile, height restricted applications, socketed or surface mounted with optional modumate interconnect products. actual size: 2.28 x 2.2 x 0.5 in 57,9 x 55,9 x 12,7 mm absolute maximum rating thermal resistance and capacity parameter min typ max unit baseplate to sink flat, greased surface 0.16 c/watt with thermal pad (p/n 20264) 0.14 c/watt baseplate to ambient free convection 8.0 c/watt 1000 lfm 1.9 c/watt farm 1 c 1 1 product type 1 = 500/750 w 2 = 750/1000 w baseplate 1 = slotted 2 = threaded 3 = thru hole pin style 1 = short pin 2 = long pin s = short modumate [1] n = long modumate [1] f = short rohs [1] g = long rohs [1] k = extra long rohs [2] product grade temperatures (c) grade operating storage e = ?10 to +100 ? 20 to +125 c = ? 20 to +100 ? 40 to +125 t = ? 40 to +100 ? 40 to +125 h = ? 40 to +100 ? 55 to +125 part numbering [1] pin styles s, n, f & g are compatible with the modumate interconnect system for socketing and surface mounting [2] not intended for socket or surfmate mounting
farm ? rev 6.7 vicorpower.com page 2 of 11 06/2015 800 927.9474 farmxxxx farm1 xxx farm2 xxx parameter min typ max min typ max unit notes output power 0 500 0 750 watts 90 ? 132 vac 0 750 0 1000 watts 180 ? 264 vac efficiency 94 96 94 96 % 120/240 vac output voltage 250 370 250 370 vdc 90 ? 264 vac external hold-up capacitance 1,750 f 2 - 3,300 f in series; hub3300-s 1,100 f 2 - 2,200 f in series; hub2200-s output specifications parameter min typ max unit notes operating input voltage low range 90 132 vac autoranging (doubler mode) high range 180 264 vac autoranging (bridge mode) input undervoltage 90 vac no damage ac line frequency 47 63 hz c-grade 47 880 hz t-grade, h-grade power factor 0.60 dependent on line source impedance, hold up capacitance and load. inrush current 30 amps 264 vac peak line input specifications (farm1xxx, farm2xxx) electrical characteristics electrical characteristics apply over the full operating range of input voltage, output power and baseplate temperature, unless otherwise specified. all temperatures refer to the operating temperature at the center of the baseplate. specifications apply f or ac mains having up to 5% total harmonic distortion. control pin specifications parameter min typ max unit notes ac bus ok (b ok) low state resistance 15 to negative output ? bus normal low state voltage 0.1 vdc bus normal 50 ma max. high state voltage 14.0 15.0 15.4 vdc bus abnormal, 27 k internal pull up to 15 vdc (see fig.11) b ok true threshold 235 240 245 vdc output bus voltage (see fig. 8) b ok false threshold 200 205 210 vdc output bus voltage module enable (en) low state resistance 15 to negative output ? converters disabled low state voltage 0.1 vdc 50 ma max. high state voltage 12 14 16 vdc 150 k internal pull up to 15 vdc (see fig. 10) enable threshold 235 240 245 vdc output bus voltage (see fig. 8) disable threshold 185 190 195 vdc output bus voltage ac bus ok - module enable, 12 14 16 vdc ac bus ok and module enable thresholds track differential error* * tracking error between bus ok and enable thresholds
farm ? rev 6.7 vicorpower.com page 3 of 11 06/2015 800 927.9474 farmxxxx electrical characteristics (cont.) general specifications parameter min typ max unit notes mtbf >1,000,000 hours 25 ?c, ground benign, mil, hdbk, 2 17 f baseplate material aluminum cover ends: zenite ? 6130 center section: kapton insulated aluminum pin material style 1 & 2 copper, tin / lead plated styles s & n (modumate compatible) copper, nickel / gold plated styles f & g (rohs compliant) copper, nickel / gold plated weight 3.1 ounces (88) (grams) size 2.28 x 2.2 x 0.5 inches (57,9 x 55,9 x 12,7) (mm) safety specifications (farm1xxx, farm2xxx) parameter min typ max unit notes isolation voltage (in to out) none isolation provided by dc-dc converter(s) dielectric withstand 2,121 vdc baseplate earthed (i/o to baseplate) leakage current 1.5 ma 264 vac agency approvals safety standards agency markings notes farm1 xxx ul60950, en60950, csa 60950 ctvus baseplate earthed, fast acting line fuse, bussman abc10 or wickman 10 a 194 series ce marked low voltage directive farm2 xxx ul60950, en60950, csa 60950 ctvus baseplate earthed, fast acting line fuse, bussman abc15 or wickman 16 a 194 series ce marked low voltage directive parameter standard notes transient / surge immunity en61000-4-5 2 kv ? 50 s line or neutral to earth 1 kv ? 50 s line to neutral line disturbance / immunity en61000-4-11 interruptions and brownouts flicker / inrush en61000-3-3 electromagnetic compatibility
farm ? rev 6.7 vicorpower.com page 4 of 11 06/2015 800 927.9474 farmxxxx figure 1 ? start up at 120 vac input operating characteristics figure 3 ? power down, from 120 vac figure 4 ? power down, from 240 vac figure 2 ? start up at 240 vac input vdc output strap engaged i ac input @2 a / mv i ac input @2 a / mv enable enable b ok vdc output b ok vdc output enable b ok vdc output enable b ok figure 5 ? output overvoltage protection 240 vac range vdc output ? enable b ok figure 6 ? typical conducted emissions
farm ? rev 6.7 vicorpower.com page 5 of 11 06/2015 800 927.9474 farmxxxx the filtered, autoranging rectifier module (farm) provides an effective solution for the ac frontend of a power supply built with vicor dc-dc converters. this high-performance power system building block satisfies a broad spectrum of requirements and agency standards. in addition to providing transient/surge immunity and emi filtering, the farm contains all of the power switching and control circuitry necessary for autoranging rectification, inrush current limiting, and overvoltage protection. this module also provides converter enable and status functions for orderly power up/down control or sequencing. to complete the ac front-end configuration, the user only needs to add hold-up capacitors, and a few discrete components. functional description initial condition the switch that bypasses the inrush limiting ptc (positive temperature coefficient) thermistor is open when power is applied, as is the switch that engages the strap for voltage doubling. (see fig. 7). in addition, the converter modules are dis abled via the enable (en) line, and bus-ok (bok) is high. power up sequence. (see fig. 8) : upon application of input power, the output bus capacitors begin to charge. the thermistor limits the charge current, and the exponential time constant is determined by the hold-up capacitor value and the thermistor cold resistance. the slope (dv/dt) of the capacitor voltage versus time approaches zero as the capacitors become charged to the peak of the ac line voltage. if the bus voltage is greater than 200 v, the doubler is not activated. if the bus voltage is greater than 235 v as the slope approaches zero, the inrush limiting thermistor is bypassed. below 235 v, it is not bypassed. the converters are enabled ~150 milliseconds after the thermistor bypass switch is closed. bus-ok is asserted after an additional ~150 millisecond delay to allow the converter outputs to settle within specification. power down sequence. (see fig. 8) when input power is turned off or fails, the following sequence occurs as the bus voltage decays: bus-ok is de-asserted when the bus voltage falls below 205 vdc (typical). the converters are disabled when the bus voltage falls below 190 vdc. if power is reapplied after the converters are disabled, the entire power-up sequence is repeated. if a momentary power interruption occurs and power is re -established before the bus reaches the disable threshold, the power up sequence is not repeated, i.e., the power conversion system rides through the momentary interruption. application note microcontroller n l ptc thermi s tor +out ?out s tr a p en bok s tr a p emi filter emi grd 400 300 200 100 0 90?32 v ac line output bus (vdc) strap ptc thermistor bypass converter enable bus ok ~150 ms power up power down 4.1 1.1 2.1 3.1 5.1 2.2 1.2 ~150 ms figure 7 ? functional block diagram: autoranging rectifier figure 8 ? timing diagram: power up/down sequence 1.1 2.1 3.1 4.1 5.1 1.2 2.2
farm ? rev 6.7 vicorpower.com page 6 of 11 06/2015 800 927.9474 farmxxxx figure 9 ? offline power supply configuration offline power supply configuration the farm maintains the dc output bus voltage between 250 and 370 vdc over the entire input voltage range, which is compatible with vicor 300 v input converters. the farm automatically switches to the proper bridge or doubler mode depending on the input voltage, eliminating the possibility of damage due to improper line connection. the farm1xxx is rated at 500 w in the low range (90-132 vac input), and 750 w in the high range (180-264 vac input). the farm2xxx is rated for 750 w and 1000 w for the low and high input ranges respectively. either of these modules can serve as the ac front end for any number and combination of compatible converters as long as the maximum power rating is not exceeded. strap (st) pin. in addition to input and output power pin connections, it is necessary to connect the strap pin to the center junction of the series hold-up capacitors (c1, c2, see fig. 9) for proper (autoranging) operation. metal oxide varistors, v1 and v2 provide capacitor protection. the bleeder resistors (r1, r2, see fig. 9) discharge the hold-up capacitors when power is switched off. capacitors c7 and c8 are recommended if the hold-up capacitors are located more than 3 inches (75 mm) from the farm output pins. enable (en) pin. (see fig. 10) the enable pin must be connected to the pc or gate-in pin of all converter modules to disable the converters during power up. otherwise, the converters would attempt to start while the hold-up capacitors were being charged through an unbypassed current limiting thermistor, preventing the bus voltage from reaching the thermistor bypass threshold, thus disabling the power supply. the enable output (the drain of an n channel mosfet) is internally pulled up to 15 v through a 150 k resistor. a signal diode should be placed close to and in series with the pc or (gate-in) pin of each converter to eliminate the possibility of control interference between converters. the enable pin switches to the high state (15 v) with respect to the negative output power pin to turn on the converters after the power up inrush is over. the enable function also provides input overvoltage protection for the converters by turning off the converters if the dc bus voltage exceeds 400 vdc. the thermistor bypass switch opens if this condition occurs, placing the thermistor in series with the input voltage, which reduces the bus voltage to a safe level while limiting input current in case the varistors conduct. the thermistor bypass switch also opens if a fault or overload reduces the bus voltage to less than 180 vdc. caution : there is no input to output isolation in the farm, hence the Cout of the farm and thus the Cin of the downstream dc-dc converter(s) are at a high potential. if it is necessary to provide an external enable / disable function by controlling the dc-dc converters pc pin (referenced to the Cin) of the converter an opto-isolator or isolated relay should be employed. +in pc (gate in) pr ?in +in pc (gate in) pr ?in vicor dc-dc converter r1 r2 c1 c2 v1 v2 d2 d1 c 3 c5 c4 c6 f1 f2 vicor dc-dc converter to additional module s c7 ** c 8** farm filter/a u tor a nging rectifier mod u le n emi gnd n/c l + bok s t en ? z1 c9 l pe n r 3 d4 c11 c10 d 3 r4 f 3 * vicor part de s cription part number c1,2 hold- u p c a p a citor s c 3 -c6 4,700 pf (y2 type) 01000 c7, 8** film c a p., 0.61 f 3 4610 c9 0.47 f 0 3 047 c10,c11 0.001 f d1, 2 diode 00670 d 3 , 4 1n5 8 17 2610 8 f1, f2 u s e recommended f us ing for s pecific dc-dc converter s r1, 2 150 k , 0.5 w r 3 , 4 *** 250 v1,2 220 v mov 3 02 3 4-220 z1 mov 270 3 0076 s izin g pcb trace s : all tr a ce s s hown in b old c a rry s ignific a nt c u rrent a nd s ho u ld b e s ized a ccordingly. n/ s t/l 10 a rm s a t 90 v a c a nd 500 w +/? in 4 a dc a t 190 vdc a nd 750 w farm2-xxx n/ s t/l 20 a rm s a t 90 v a c a nd 750 w +/? in 8 a dc a t 190 vdc a nd 1000 w * s ee agency approv a l s on farm d a t a s heet. ** re qu ired if c1 & c2 a re loc a ted more th a n 3 in (75 mm) from o u tp u t of the farm. *** not us ed with vi-260/vi-j60 not us ed with vi-260/vi-j60 application note (cont.)
farm ? rev 6.7 vicorpower.com page 7 of 11 06/2015 800 927.9474 farmxxxx +in pc (gate in) pr ?in n emi gnd n/c l + en ? 150 k 15 vdc micro- controller vicor dc-dc converter farm bok st not used with vi-260/vi-j60 figure 10 ? enable (en) function bus-ok (bok) pin. (see fig. 11) the bus-ok pin is intended to provide early-warning power fail information and is also referenced to the negative output pin. caution : there is no input-to-output isolation in the farm. it is necessary to monitor bus ok via an optoisolator if it is to be used on the secondary (output) side of the converters. a line-isolation transformer should be used when performing scope measurements. scope probes should never be applied simultaneously to the input and output as this will damage the module. filter. (see fig. 12) an integral input filter consists of a common mode choke and y rated capacitors (line-ground) plus two x rated capacitors (line-line). this filter configuration provides common mode and differential mode insertion loss in the frequency range between 100 khz and 30 mhz as illustrated in figure 6. hold-up capacitors. hold-up capacitor values should be determined according to output bus voltage ripple, power fail hold-up time, and ride-through time (see fig. 13) . many applications requir e the power supply to maintain output regulation during a momentary power failure of specified duration, i.e., the converters must hold-up or ride- through such an event while maintaining undisturbed output voltage regulation. similarly, many of these same systems require notification of an impending power failure in order to allow time to perform an orderly shut down. the energy stored on a capacitor which has been charged to voltage v is: = 1/2(cv 2 )(1) where: = stored energy c = capacitance v = voltage across the capacitor energy is given up by the capacitors as they are discharged by the converters. the energy expended (the power-time product) is: = p t = c(v 1 2 Cv 2 2 ) / 2 (2) where: p = operating power t = discharge interval v 1 = capacitor voltage at the beginning of t v 2 = capacitor voltage at the end of t rearranging equation 2 to solve for the required capacitance: c = 2p t / (v 1 2 Cv 2 2 )(3) application note (cont.) +in pc pr ?in n emi gnd n/c l + bok s t en ? vicor dc-dc converter micro- controller 15 vdc +5 vdc s econd a ry referenced figure 11 ? bus ok (bok) isolated power status indicator 4.7 nf l1 4.7 nf n emi gnd n/c l 0.47 f 0.099 f 330 h + bok st en ? cm figure 12 ? internal filter
farm ? rev 6.7 vicorpower.com page 8 of 11 06/2015 800 927.9474 farmxxxx the power fail warning time ( t) is defined as the interval between b ok and converter shut down (en) as illustrated in fig. 13. the bus-ok and enable thresholds are 205 v and 190 v, respectively. a simplified relationship between power fail warning time, operating power, and bus capacitance is obtained by inserting these constants: c = 2p t / (205 2 C 190 2 ) c = 2p t / (5,925) it should be noted that the series combination (c1, c2, see fig. 9) requires each capacitor to be twice the calculated value, but the required voltage rating of each capacitor is reduced to 200 v. allowable ripple voltage on the bus (or ripple current in the capacitors) may define the capacitance requirement. consideration should be given to converter ripple rejection and resulting output ripple voltage. for example, a converter whose output is 15 v and nominal input is 300 v will provide approximately 56 db ripple rejection, i.e., 10 v p- p of input ripple will produce 15 mv p-p of output ripple (see fig. 17) . equation 3 is again used to determine the required capacitance. in this case, v 1 and v 2 are the instantaneous values of bus voltage at the peaks and valleys (see fig. 13) of the ripple, respectively. the capacitors must hold-up the bus voltage for the time interval ( t) between peaks of the rectified line as given by: t = ( C ) / 2f (4) where: f = line frequency = rectifier conduction angle the approximate conduction angle is given by: = cos -1 ( v 2 /v 1 ) (5) another consideration in hold-up capacitor selection is their ripple current rating. the capacitors rating must be higher than the maximum operating ripple current. the approximate operating ripple current (rms) is given by: i rms = 2p/vac (6) where: p = total output power vac = operating line voltage calculated values of bus capacitance for various hold-up time, ride-through time, and ripple voltage requirements are given as a function of operating power level in figures 14, 15, and 16, respectively. application note (cont.) example in this example, the output required from the dc-dc converter at the point of load is 12 vdc at 320 w. therefore, the output power from the farm would be 375 w (assuming a converter efficiency of 85%). the desired hold-up time is 9 ms over an input range of 90 to 264 vac. determining required capacitance for power fail warning. figure 14 is used to determine capacitance for a given power fail warning time and power level, and shows that the total bus capacitance must be at least 820 f. since two capacitors are used in series, each capacitor must be at least 1,640 f. note that warning time is not dependent on line voltage. a hold-up capacitor calculator is available on the vicor website, at: www.vicorpower.com/powerbench/product-calculators . determining ride-through time. figure 15 illustrates ride- through time as a function of line voltage and output power, and shows that at a nominal line of 90 vac, ride-through would be 68 ms. ride-through time is a function of line voltage. determining ripple voltage on the hold-up capacitors. figure 16 is used to determine ripple voltage as a function of operating power and bus capacitance, and shows that the ripple voltage across the hold-up capacitors will be 12 v p-p. determining the ripple on the output of the dc-dc converter. figure 17 is used to determine the approximate ripple rejection of the dc-dc converter and indicates a ripple rejection of approximately 60 db for a 12 v output. since the ripple on the bus voltage is 12 vac and the ripple rejection of the converter is 60 db, the output ripple of the converter due to ripple on its input (primarily 120 hz) will be 12 mv p-p. for more information about designing an autoranging ac input power supply using the farm and vicor dc-dc converter modules, contact vicor applications engineering at the nearest vicor technical support center, or send email to apps@vicorpower.com. ? ? ?
farm ? rev 6.7 vicorpower.com page 9 of 11 06/2015 800 927.9474 farmxxxx output voltage ripple rejection (db) 40 45 50 55 60 65 70 75 80 50 30 15 5 2 figure 17 ? converter ripple rejection vs. output voltage (typical) application note (cont.) * operating power (w) power fail warning time (ms) 0 5 10 15 20 25 30 35 40 1000 750 500 250 * * (farm2xxx) (farm1xxx) figure 14 ? power fail warning time vs. operating power and total bus capacitance, series combination of c1, c2 (see fig. 9) operatin g power (w) p-p ripple volta g e (vac) 0 5 10 15 20 25 3 0 2200 f 1600 f 1 3 00 f 1000 750 500 250 * 1100 f 8 20 f 6 8 0 f * * (farm1xxx) (farm2xxx) figure 16 ? ripple voltage vs. operating power and bus capacitance, series combination of c1, c2 (see fig. 9) operatin g power (w) ride-throu g h time (m s ) 0 10 20 3 0 40 50 60 70 8 0 90 100 90 v a c 115 v a c 1000 750 500 250 tot a l c a p a cit a nce 8 20 f figure 15 ? ride-through time vs. operating power figure 13 ? hold-up time 20 v 190 v power f a il power f a il w a rning b us ok converter s h u t down hold- u p time 254 v ride-thro u gh time ripple (v p-p) ? ?
farm ? rev 6.7 vicorpower.com page 10 of 11 06/2015 800 927.9474 farmxxxx pcb mounting specifications mechanical diagram converter pins no. function label 1 neutral n 2 emi gnd 3nc 4 line l 5?out ? 6 enable en 7 strap st 8 bus ok bok 9+out + (2x) full r (6x) (6x) (ref.) 0.10 2,5 2.000 50,80 1.30 33,0 2.28 57,9 2.20 55,9 0.130 3,30 0.10 2,5 0.49 12,4 0.65 16,5 0.06 1,5 r (3x) x 45? chamfer use a 4-40 screw (6x) torque to: 5 in-lbs 0.57 n-m (2x) 0.01 0.35 8,8 0.20** 5,1 0.12* 3,1 dia,(7x) 0.150 3,81 (ref) dia,(2x) 0.080 2,03 4 3 1 98 2 76 5 0.23 5,8 0.400 10,16 1.400 35,56 1.000 25,40 0.700 17,78 2.20 55,9 1.76 44,7 0.54 13,7 0.43 10,9 pin style 2&n (long pin) 0.62 15,7 pin style 1&s (short pin) (9x) (9x) (all markings this surface) aluminum baseplate 0.50 0.02 12,7 0,5 * style 1 baseplate only ** style 2 & 3 baseplates *** reserved for vicor accessories not for mounting pin center line style 2 & 3 baseplates only (4x)*** 0.300 0.015 7,62 0,38 0.300 0.015 7,62 0,38 1.900 48,26 pin c l c l slotted threaded 4-40 unc-2b (6x) thru hole #30 drill thru (6x) (0.1285) 0.13 3,3 full r (6x) (6x) pin style k (extra long pin) 0.71 18,0 (9x) notes: 1. material: base: 6000 series aluminum cover: lcp, aluminum 3003 h14 pins: rohs pins gold plate 30 micro inch min; non-rohs pins: tin/lead 90/10 bright 2. dimensions and values in brackets are metric 3. manufacturing control is in place to ensure that the spacing between the modules label surface to the printed circuit board of the application ranges from direct contact (zero), to the maximum gap as calculated from the tolerance stack-up and is not subject negative tolerance accumulation 0.195 4,95 1.400* 35,56 1.000* 25,40 0.700* 17,78 0.400* 10,16 1.790** 45,47 0.06 1,5 r (4x) 0.158 4,01 5 6 7 8 9 12 34 0.003 0,08 * denotes tol = pcb thickness 0.062 0.010 1,57 0,25 short pin style 0.094 0.003 2,39 0,08 inboard solder mount 0.45 0.43 0.45 0.45 11,5 0.53 13,5 1.900* 48.26 1.900* 48,26 1.575** 40,00 0.164 0.003 4,16 0,08 long pin style 0.094 0.003 2,39 0,08 onboard solder mount 0.164 0.003 4,16 0,08 plated through hole dia (7x) (2x) ** pcb window 0.45 this surface pins styles solder:tin / lead plated modumate: gold plated copper rohs: gold plated copper aluminum baseplate consult vicor application note: soldering methods and procedures for 1st and 2nd generation modules.
farm ? rev 6.7 vicorpower.com page 11 of 11 06/2015 800 927.9474 farmxxxx vicor?s comprehensive line of power solutions includes high density ac-dc and dc-dc modules and accessory components, fully configurable ac-dc and dc-dc power supplies, and complete custom power systems. information furnished by vicor is believed to be accurate and reliable. however, no responsibility is assumed by vicor for its use. vicor makes no representations or warranties with respect to the accuracy or completeness of the contents of this publication. vicor reserves the right to make changes to any products, specifications, and product descriptions at any time without notice. information published by vicor h as been checked and is believed to be accurate at the time it was printed; however, vicor assumes no responsibility for inaccuracies. testing and other quality controls are used to the extent vicor deems necessary to support vicor?s product warranty. except where mandated by government requirem ents, testing of all parameters of each product is not necessarily performed. specifications are subject to change without notice. vicor?s standard terms and conditions all sales are subject to vicor?s standard terms and conditions of sale, which are available on vicor?s webpage or upon request. product warranty in vicor?s standard terms and conditions of sale, vicor warrants that its products are free from non-conformity to its standard specifications (the ?express limited warranty?). this warranty is extended only to the original buyer for the period expiring two (2) years after t he date of shipment and is not transferable. unless otherwise expressly stated in a written sales agreement signed by a duly authorized vicor signatory, vicor disclaims all representations, liabilities, and warranties of any kind (whether arising by implication or by operation of law) with respect to the products, including, without limitation, any warranties or representations as to merchantability, fitness for particular purpose, infringement of any patent, copyright, or other intellectual property right, or any other matter. this warranty does not extend to products subjected to misuse, accident, or improper application, maintenance, or storage. vico r shall not be liable for collateral or consequential damage. vicor disclaims any and all liability arising out of the application or use of any pro duct or circuit and assumes no liability for applications assistance or buyer product design. buyers are responsible for their products and applications us ing vicor products and components. prior to using or distributing any products that include vicor components, buyers should provide adequate design, testing and operating safeguards. vicor will repair or replace defective products in accordance with its own best judgment. for service under this warranty, the buyer must contact vicor to obtain a return material authorization (rma) number and shipping instructions. products returned without prior author ization will be returned to the buyer. the buyer will pay all charges incurred in returning the product to the factory. vicor will pay all re shipment charges if the product was defective within the terms of this warranty. life support policy vicor?s products are not authorized for use as critical components in life support devices or systems without the express prior written approval of the chief executive officer and general counsel of vicor corporation. as used herein, life support devices or systems are devices which (a) are intended for surgical implant into the body, or (b) support or sustain life and wh ose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in a s ignificant injury to the user. a critical component is any component in a life support device or system whose failure to perform can be reasonably expec ted to cause the failure of the life support device or system or to affect its safety or effectiveness. per vicor terms and conditions of sale, the user of vicor products and components in life support applications assumes all risks of such use and indemnifies vicor against all liability and damag es. intellectual property notice vicor and its subsidiaries own intellectual property (including issued u.s. and foreign patents and pending patent applications ) relating to the products described in this data sheet. no license, whether express, implied, or arising by estoppel or otherwise, to any intel lectual property rights is granted by this document. interested parties should contact vicor's intellectual property department. vicor corporation 25 frontage road andover, ma, usa 01810 tel: 800-735-6200 fax: 978-475-6715 email customer service: custserv@vicorpower.com technical support: apps@vicorpower.com

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