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| cool-power ? rev 1.2 vicorpower.com page 1 of 22 02/2015 800 927.9474 48 v in and 3.3 - 18 v out , cool-power zvs isolated dc-dc converter modules cool-power ? 48 volt product description the cool- power zvs isolated converter module series consists of high density isolated dc-dc converters implementing zero voltage switching topology. the 48 vin cool- power series operates over a wide input range of 36 v to 75 v with 3.3 v and 12 v output models and a narrower range of 41 v to 57 v at 18 v output for poe and other applications. both model sets produce 60w of output power, yeilding an unprecedented power density of 400 w/in 3 . these converter modules are surface mountable and only ~.5" square in area achieving ~50% space reduction versus conventional solutions. a switching frequency of 900 khz allows for small input and output ?lter components which further reduces the total size and cost of the overall system solution. the output voltage is sensed and fed back to the internal controller using a proprietary isolated magnetic feedback scheme which allows for high bandwidth and good common mode noise immunity. the 48 volt pi31xx series requires no external feedback compensation and offers a total solution with a minimum number of external components. a rich feature set is offered, including output voltage trim capability, output over-voltage protection, adjustable soft-start, over-current protection with auto-restart, over and under input voltage lockout and a temperature monitoring and protection function that provides an analog voltage proportional to the die temperature as shut down and alarm capabilities. features ? efficiency up to 89% ? high switching frequency minimizes input filter requirements and reduces output capacitance ? proprietary ?double-clamped? zvs buck-boost topology ? proprietary isolated magnetic feedback ? small footprint (0.57 in2) enables pcb area savings ? very low profile (0.265 in) ? on/off control, positive logic ? wide trim range +10/-20% ? temperature monitor (tm) & over-temperature protection (otp) ? input uvlo & ovlo and output ovp ? over current protection with auto restart ? adjustable soft-start ? 2250 vdc input to output isolation ? surface mountable 0.87? x 0.65? x 0.265? package applications ? space constrained systems ? isolated board level power ? network power systems ? telecommunications ? distributed power architecture ? poe-power over ethernet ? ipol - isolated point of load power package information ? surface mountable 0.87? x 0.65? x 0.265? package ? weight = 7.8 grams device output voltage i out max set range pi3101-00-hviz 3.3 v 2.97 to 3.63 v 18 a pi3105-00-hviz 12 v 9.6 to 13.2 v 5 a pi3110-01-hviz 18 v 16.2 to 19.8 v 3.3 a
cool-power ? rev 1.2 vicorpower.com page 2 of 22 02/2015 800 927.9474 48 volt pi31xx contents contents page order information 3 absolute maximum ratings 4 functional block diagram 5 pin description 6 package pin-out 6 pi3101-00-hviz electrical characteristics 7 pi3105-00-hviz electrical characteristics 11 pi3110-01-hviz electrical characteristics 15 functional description 19 input power pins 19 enable 19 trim/ss 19 tm 20 sgnd 20 output power pins 20 package outline & recommended pcb land pattern 21 warranty information 22 cool-power ? rev 1.2 vicorpower.com page 3 of 22 02/2015 800 927.9474 48 volt pi31xx order information transport cool-power vin vout iout max package media pi3101-00-hviz 36 - 75 v 3.3 v 18 a 0.87? x 0.65? x 0.265? tray pi3105-00-hviz 36 - 75 v 12 v 5 a 0.87? x 0.65? x 0.265? tray pi3110-01-hviz 41 - 57 v 18 v 3.3 a 0.87? x 0.65? x 0.265? tray also available pi3109-01-hviz 18 - 36 v 5 v 10 a 0.87? x 0.65? x 0.265? tray pi3106-01-hviz 18 - 36 v 12 v 4.2 a 0.87? x 0.65? x 0.265? tray pi3109-00-hvmz 16 - 50 v 5 v 10 a 0.87? x 0.65? x 0.265? tray pi3106-00-hvmz 16 - 50 v 12 v 4.2 a 0.87? x 0.65? x 0.265? tray pi3111-00-hvmz 16 - 5 0v 15 v 3.33 a 0.87? x 0.65? x 0.265? tray cool-power ? rev 1.2 vicorpower.com page 4 of 22 02/2015 800 927.9474 48 volt pi31xx name rating +in to -in max operating voltage pi3101-00-hviz/pi3105-00-hviz pi3110-01-hviz -1.0 to 75 vdc (operating) -1.0 to 57 vdc (operating) +in to -in max peak voltage pi3101-00-hviz/pi3105-00-hviz pi3110-01-hviz 100 vdc (non-operating 100ms) 80 vdc (non-operating 100ms) enable to ?in -0.3 to 6.0 vdc tm to ?in -0.3 to 6.0 vdc trim/ss to ?in -0.3 to 6.0 vdc +out to ?out see relevant model output section continuous output current see relevant model output section peak output current see relevant model output section operating junction temperature -40 to 125c storage temperature -50 to 125c case temperature during reflow 245c absolute maximum ratings cool-power ? rev 1.2 vicorpower.com page 5 of 22 02/2015 800 927.9474 functional block diagram trim/ss +out sgnd -out -in +in enable tm lff - + rss css int vref 1.22v rfb1 cfb1 cfb2 - + error amp driver - + dc slow current limit driver synchronous rectifier - + dc output ovp - + dc input uvp input ovp - + dc - + dc fast current limit over temp - + dc enb period ramp - + dc enable - + dc on-duty ramp - + zvs power train + - dc timing logic fb fb enb +5v ea fault - + dc 120us delay 120us delay fault latch and reset logic reset fault run bias start bias vcc temp sensor zvs power train zvs fb 48 volt pi31xx cool-power ? rev 1.2 vicorpower.com page 6 of 22 02/2015 800 927.9474 48 volt pi31xx package pin-out pin name description +in primary side positive input voltage terminals. -in primary side negative input voltage terminals. enable converter enable option, functions as 5v reference and on/off control pin. pull low for off. trim/ss external soft start pin and trim function. connect to sgnd or enable through resistor for trim up or trim down. tm temperature measurement output pin. sgnd signal ground, primary side referenced. +out isolated secondary dc output voltage positive terminals. -out isolated secondary dc output voltage negative terminals. pin description u.s. pats. listed on packing materials & datasheets made in usa cool-power +in -in +out -out sgnd tm trim/ss enable cool-power ? rev 1.2 vicorpower.com page 7 of 22 02/2015 800 927.9474 48 volt pi31xx pi3101-00-hviz electrical characteristics unless otherwise specified: 36 v < v in < 75 v, 0 a < i out < 18 a, -40c < t case < 100c (1) [1] these parameters are not production tested but are guaranteed by design, characterization and correlation with statistical proc ess control. unless otherwise specified, ate tests are completed at room temperature. [2] current flow sourced by a pin has a negative sign. parameter symbol conditions min typ max unit input specifications input voltage range v in 36 48 75 vdc input dv/dt (1) v indvdt v in = 75 v 1.0 v/s input under-voltage turn-on v uvon i o = 1.8 a 32.5 34.0 35.0 vdc input under-voltage turn-off v uvoff i o = 1.8 a 30.5 32.0 33.0 vdc input under-voltage hysteresis v uvh i o = 1.8 a 2 vdc input over-voltage turn-on v ovon i o = 1.8 a 75.7 78 81.0 vdc input over-voltage turn-off v ovoff i o = 1.8 a 77.7 80.0 82.3 vdc input over-voltage hysteresis v ovh i o = 1.8 a 1.6 vdc input quiescent current i q v in = 48 v, enable = 0 v 2.5 madc input idling power p idle v in = 48 v, i out = 0 a 4 w input standby power p sby v in = 48 v, enable = 0 v 0.120 w input current full load i in t case = 100c i out = 18 a fl = 86.5% typical v in = 48 v 1.43 adc input reflected ripple current i inrr l in = 2 h c in = 47 f 100 v electrolytic 10 mapp + 2 x 1 f 100 v x7r ceramic recommended ext input c in c in = 47 f 100 v electrolytic + 2 x 1 f 100 v x7r ceramic capacitance c in = cbulk + chf 49 f output specifications output voltage set point v out i out = 9 a 3.3 vdc total output accuracy v oa 0c cool-power ? rev 1.2 vicorpower.com page 9 of 22 02/2015 800 927.9474 48 volt pi31xx no heatsink thermal derating temp c load currrent (amps) 36 v 0 lfm 48 v 0 lfm 60 v 0 lfm 36 v 200 lfm 48 v 200 lfm 60 v 200 lfm 36 v 600 lfm 48 v 600 lfm 60 v 600 lfm 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 figure 2 ? load currrent vs temperature (without heat sink) figure 1 ? conversion efficiency figure 3 ? load currrent vs temperature (6.3mm heat sink) 11 mm heatsink thermal derating temp c load currrent (amps) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 36 v 0 lfm 48 v 0 lfm 60 v 0 lfm 36 v 200 lfm 48 v 200 lfm 60 v 200 lfm 36 v 600 lfm 48 v 600 lfm 60 v 600 lfm figure 4 ? load currrent vs ambient temperature (11mm heat sink) figure 6 ? start up c ref = 0 (v in = 48 v, i out = 18 a, cr, c out = 12 x 10 f x7r ceramic) figure 5 ? start up c ref = 0 (v in = 36 v, i out = 18 a, cr, c out = 12 x 10 f x7r ceramic) pi3101-00-hviz electrical characteristics 6.3 mm heatsink thermal derating temp c load currrent (amps) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 36 v 0 lfm 48 v 0 lfm 60 v 0 lfm 36 v 200 lfm 48 v 200 lfm 60 v 200 lfm 36 v 600 lfm 48 v 600 lfm 60 v 600 lfm conversion efficiency at 100c load curent (amps) efficiency 100? 36 v 40 45 50 55 60 65 70 75 80 85 90 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 100? 48 v 100? 60 v cool-power ? rev 1.2 vicorpower.com page 10 of 22 02/2015 800 927.9474 48 volt pi31xx figure 8 ? transient response (v in = 48 v, i out = 9 - 18 a, 0.1 a/s, c out = 12 x 10 f x7r ceramic) figure 7 ? start up c ref = 0 (v in = 75 v, i out = 18 a, cr, c out = 12 x 10 f x7r ceramic) figure 9 ? output ripple (v in = 48 v, i out = 18 a, cr, c out = 12 x 10 f x7r ceramic) figure 10 ? thermal image (v in = 48 v, i out = 18 a, cr, 0 lfm evaluation pcb) pi3101-00-hviz electrical characteristics cool-power ? rev 1.2 vicorpower.com page 11 of 22 02/2015 800 927.9474 48 volt pi31xx pi3105-00-hviz electrical characteristics unless otherwise specified: 36 v < v in < 75 v, 0 a < i out < 5 a, -40c < t case < 100c (1) [1] these parameters are not production tested but are guaranteed by design, characterization and correlation with statistical proc ess control. unless otherwise specified, ate tests are completed at room temperature. [2] current flow sourced by a pin has a negative sign. parameter symbol conditions min typ max unit input specifications input voltage range v in 36 48 75 vdc input dv/dt (1) v indvdt v in = 75 v 1.0 v/s input under-voltage turn-on v uvon i o = 5 a 32.5 34.0 35.0 vdc input under-voltage turn-off v uvoff i o = 5 a 30.5 31.5 33 vdc input under-voltage hysteresis v uvh i o = 5 a 2.5 vdc input over-voltage turn-on v ovon i o = 5 a 75.7 78 81.0 vdc input over-voltage turn-off v ovoff i o = 5 a 77.7 80 82.3 vdc input over-voltage hysteresis v ovh i o = 5 a 2 vdc input quiescent current i q v in = 48 v, enable = 0 v 2.5 madc input idling power p idle v in = 48 v, i out = 0 a 4.1 w input standby power p sby v in = 48 v, enable = 0 v 0.120 w input current full load i in t case = 100c i out = 5 a fl = 88.5% typical v in = 48 v 1.412 adc input reflected ripple current i inrr l in = 2 h c in = 47 f 100 v electrolytic 10 mapp + 2 x 1 f 100 v x7r ceramic recommended ext input c in c in = 47 f 100 v electrolytic + 2 x 1 f 100 v x7r ceramic capacitance c in = cbulk + chf 49 f output specifications output voltage set point v out i out = 2.5 a 12.0 vdc total output accuracy v oa 0c cool-power ? rev 1.2 vicorpower.com page 13 of 22 02/2015 800 927.9474 48 volt pi31xx no heatsink thermal derating temp c load currrent (amps) 36 v 0 lfm 48 v 0 lfm 60 v 0 lfm 36 v 200 lfm 48 v 200 lfm 60 v 200 lfm 36 v 600 lfm 48 v 600 lfm 60 v 600 lfm 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6 3.8 4 4.2 4.4 4.6 4.8 5 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 figure 12 ? load currrent vs temperature (without heat sink) conversion efficiency at 100c load curent (amps) efficiency 36 v 100? 48 v 100? 60 v 100? 50 55 60 65 70 75 80 85 90 95 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6 3.8 4 4.2 4.4 4.6 4.8 5 figure 11 ? conversion efficiency 6.3 mm heatsink thermal derating temp c load currrent (amps) 36 v 0 lfm 48 v 0 lfm 60 v 0 lfm 36 v 200 lfm 48 v 200 lfm 60 v 200 lfm 36 v 600 lfm 48 v 600 lfm 60 v 600 lfm 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6 3.8 4 4.2 4.4 4.6 4.8 5 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 figure 13 ? load currrent vs temperature (6.3mm heat sink) 11 mm heatsink thermal derating temp c load currrent (amps) 36 v 0 lfm 48 v 0 lfm 60 v 0 lfm 36 v 200 lfm 48 v 200 lfm 60 v 200 lfm 36 v 600 lfm 48 v 600 lfm 60 v 600 lfm 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6 3.8 4 4.2 4.4 4.6 4.8 5 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 figure 14 ? load currrent vs ambient temperature (11mm heat sink) figure 16 ? start up c ref = 0 (v in = 48 v, i out = 5 a, cr, c out = 6 x 4.7 f x7r ceramic) figure 15 ? start up c ref = 0 (v in = 36 v, i out = 5 a, cr, c out = 6 x 4.7 f x7r ceramic) pi3105-00-hviz electrical characteristics cool-power ? rev 1.2 vicorpower.com page 14 of 22 02/2015 800 927.9474 48 volt pi31xx figure 18 ? transient response (v in = 48 v, i out = 3.75 - 5 a, 0.1 a/s, c out = 6 x 4.7 f x7r ceramic) figure 17 ? start up c ref = 0 (v in = 75 v, i out = 5 a, cr, c out = 6 x 4.7 f x7r ceramic) figure 19 ? output ripple (v in = 48 v, i out = 5 a, cr, c out = 6 x 4.7 f x7r ceramic) figure 20 ? thermal image (v in = 48 v, i out = 5 a, cr, 0 lfm evaluation pcb) pi3105-00-hviz electrical characteristics cool-power ? rev 1.2 vicorpower.com page 15 of 22 02/2015 800 927.9474 48 volt pi31xx pi3110-01-hviz electrical characteristics unless otherwise specified: 41 v < v in < 57 v, 0 a < i out < 3.3 a, -0c < t case < 100c (1) [1] these parameters are not production tested but are guaranteed by design, characterization and correlation with statistical proc ess control. unless otherwise specified, ate tests are completed at room temperature. [2] current flow sourced by a pin has a negative sign. parameter symbol conditions min typ max unit input specifications input voltage range v in 41 52 57 vdc input dv/dt (1) v indvdt v in = 57 v 1.0 v/s input under-voltage turn-on v uvon i o = 3.3 a 37.1 38.6 40.2 vdc input under-voltage turn-off v uvoff i o = 3.3 a 34.5 36.2 38 vdc input under-voltage hysteresis v uvh i o = 3.3 a 2.4 vdc input over-voltage turn-on v ovon i o = 3.3 a 57.5 60 62.5 vdc input over-voltage turn-off v ovoff i o = 3.3 a 59 61.3 63.5 vdc input over-voltage hysteresis v ovh i o = 3.3 a 1.3 vdc input quiescent current i q v in = 52 v, enable = 0 v 2.5 madc input idling power p idle v in = 52 v, i out = 0 a 3.3 w input standby power p sby v in = 52 v, enable = 0 v 0.130 w input current full load i in t case = 100c i out = 3.3 a fl = 89% typical v in = 52 v 1.28 adc input reflected ripple current i inrr l in = 2 h c in = 47 f 100 v electrolytic 20 mapp + 2 x 1 f 100 v x7r ceramic recommended ext input c in c in = 47 f 100 v electrolytic + 2 x 1 f 100 v x7r ceramic capacitance c in = cbulk + chf 49 f output specifications output voltage set point v out i out = 1.65 a 18 vdc total output accuracy v oa -0c cool-power ? rev 1.2 vicorpower.com page 17 of 22 02/2015 800 927.9474 48 volt pi31xx no heatsink thermal derating temp c load currrent (amps) 41 v 0 lfm 50 v 0 lfm 57 v 0 lfm 41 v 200 lfm 50 v 200 lfm 57 v 200 lfm 41 v 600 lfm 50 v 600 lfm 57 v 600 lfm 0 0.33 0.66 0.99 1.32 1.65 1.98 2.31 2.64 2.97 3.3 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 figure 22 ? load currrent vs temperature (without heat sink) conversion efficiency at 100c load curent (amps) efficiency 41 v 100? 50 v 100? 57 v 100? 60 65 70 75 80 85 90 0.3 0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9 3.1 3.3 figure 21 ? conversion efficiency 6.3 mm heatsink thermal derating temp c load currrent (amps) 0 0.33 0.66 0.99 1.32 1.65 1.98 2.31 2.64 2.97 3.3 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 41 v 0 lfm 50 v 0 lfm 57 v 0 lfm 41 v 200 lfm 50 v 200 lfm 57 v 200 lfm 41 v 600 lfm 50 v 600 lfm 57 v 600 lfm figure 23 ? load currrent vs temperature (6.3mm heat sink) 11 mm heatsink thermal derating temp c load currrent (amps) 41 v 0 lfm 50 v 0 lfm 57 v 0 lfm 41 v 200 lfm 50 v 200 lfm 57 v 200 lfm 41 v 600 lfm 50 v 600 lfm 57 v 600 lfm 0 0.33 0.66 0.99 1.32 1.65 1.98 2.31 2.64 2.97 3.3 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 figure 24 ? load currrent vs ambient temperature (11mm heat sink) figure 26 ? start up c ref = 0 (v in = 52 v, i out = 3.3 a, cr, c out = 6 x 2.2 f x7r ceramic) figure 25 ? start up c ref = 0 (v in = 41 v, i out = 3.3 a, cr, c out = 6 x 2.2 f x7r ceramic) pi3110-01-hviz electrical characteristics cool-power ? rev 1.2 vicorpower.com page 18 of 22 02/2015 800 927.9474 48 volt pi31xx figure 28 ? transient response (v in = 52 v, i out = 2.475 - 3.3 a, 0.1 a/s, c out = 6 x 2.2 f x7r ceramic) figure 27 ? start up c ref = 0 (v in = 52 v, i out = 3.3 a, cr, c out = 6 x 2.2 f x7r ceramic) figure 29 ? output ripple (v in = 52 v, i out = 3.3 a, cr, c out = 6 x 2.2 f x7r ceramic) figure 30 ? thermal image (v in = 52 v, i out = 3.3 a, cr, 0 lfm evaluation pcb) pi3110-01-hviz electrical characteristics functional description input power pins in(+) and in(-) the input power pins on the 48 volt pi31xx are connected to the input power source which can range from 36 v to 75 v dc. (pi3110-01-hviz 41 v to 57 v) under surge conditions, the 48 volt pi31xx can withstand up to 100 v dc. (pi3110-01-hviz 80 v) for 100 ms without incurring damage. the user should take care to avoid driving the input rails above the specified ratings. since the 48 volt pi31xx is designed with high reliability in mind, the input pins are continuously monitored. if the applied voltage exceeds the input over-voltage trip point the conversion process shall be terminated immediately. the converter initiates soft-start automatically within 80ms after the input voltage is reduced back to the appropriate value. the input pins do not have reverse polarity protection. if the 48 volt pi31xx is operated in an environment where reverse polarity is a concern, the user should consider using a polarity protection device such as a suitably rated diode. to avoid the high losses of using a diode, the user should consider the much higher efficiency picor family of intelligent cool-oring? solutions that can be used in reverse polarity applications. information is available at picorpower.com . the 48 volt pi31xx will draw nearly zero current until the input voltage reaches the internal start up threshold. if the enable pin is not pulled low by external circuitry, the output voltage will begin rising to its final output value about 80ms after the input uv lockout releases. this will occur automatically even if the enable pin is floating. to help keep the source impedance low, the input to the 48 volt pi31xx should be bypassed with (2) 1.0 uf 100 v ceramic capacitors of x7r dielectric in parallel with a low q 47 uf 100 v electrolytic capacitor. to reduce emi and reflected ripple current, a series inductor of 0.2 to 0.47 uh can be added. the input traces to the module should be low impedance configured in such a manner as to keep stray inductance minimized. enable the enable pin serves as a multi-function pin for the 48 volt pi31xx . during normal operation, it outputs the on-board 4.9 v regulator which can be used for trimming the module up. the enable pin can also be used as a remote enable pin either from the secondary via an optocoupler and some external isolated bias supply or from the primary side through a small signal transistor, fet or any device that sinks 3.3 ma, minimum. if the enable pin is lower than 2.35 v typical, the converter will be held off or shut down if already operating. a third feature is offered in that during a fault condition such as output ovp, input uv or ov, or output current limit, the enable pin is pulled low internally. this can be used as a signal to the user that a fault has occurred. whenever the enable pin is pulled low, the trim/ss pin follows, resetting the internal and external soft-start circuitry. all faults will pull enable low including over temperature. if increased turn on delay is desired, the enable pin can be bypassed with a small capacitor up to a maximum of 1500 pf. trim/ss pin the trim/ss pin serves as another multi-purpose pin. first, it is used as the reference for the internal error amplifier. connecting a resistor from trim/ss to sgnd allows the reference to be margined down by as much as -20%. connecting a resistor from trim/ss to enable will allow the reference and output voltage to be margined up by 10%. if the user wishes a longer start up time, a small ceramic capacitor can be added to trim/ss to increase it. it is critical to connect any device between trim/ss and sgnd and not -in, otherwise high frequency noise will be introduced to the reference and possibly cause erratic operation. referring to the figures below, the appropriate trim up or trim down resistor can be calculated using the equivalent circuit diagram and the equations. when trimming up the trim down resistor is not populated and when trimming down, the trim up resistor is not populated. the soft start time is adjustable within the limits defined by the data tables and has a default value of 500us to reach steady state. the internal soft start capacitor value is 10nf. enable trim/ss sgnd rss rhigh rlow vero vref pi31xx 10k ? ? ? cool-power ? rev 1.2 vicorpower.com page 19 of 22 02/2015 800 927.9474 48 volt pi31xx figure 31 ? picor 48 volt pi31xx shown with system fuse, filter, decoupling and extended soft start figure 32 ? trim equations and equivalent circuit r low = ( ? ) ? r int ( ?out nom ) + v desired desired r high = ( ?ss ) ? ( ?out nom ) ? v ero + v ? v ref v ref [ ( ?out nom ) + v ] desired desired c ref = t ssdesired ?230 ? 10 ?6 23000 cool-power ? rev 1.2 vicorpower.com page 20 of 22 02/2015 800 927.9474 48 volt pi31xx tm the tm pin serves as an output indicator of the internal package temperature which is within +/- 5k of the hottest junction temperature. because of this, it is a good indicator of a thermal overload condition. the output is a scaled, buffered analog voltage which indicates the internal temperature in degrees kelvin. upon a thermal overload, the tm pin is pulled low, indicating a thermal fault has occurred. upon restart of the converter, the tm pin reverts back to a buffered monitor. the thermal shutdown function of the 48 volt pi31xx is a fault feature which interrupts power processing if a certain maximum temperature is exceeded. tm can be monitored by an external microcontroller or circuit configured as an adaptive fan speed controller so that air flow in the system can be conveniently regulated. sgnd the 48 volt pi31xx sgnd pin is the quiet control circuitry return. it is basically an extension of the internal signal ground. to avoid contamination and potential ground loops, this ground should not be connected to -in since it is already star connected inside the package. connect signal logic to sgnd. output power pins +out and -out the output power terminals out(+) and out(-) deliver the maximum output current from the 48 volt pi31xx through the j-lead output pins. this configuration allows for a low impedance output and should be connected to multi-layer pcb parallel planes for best performance. due to the high switching frequency, output ripple and noise can be easily attenuated by adding just a few high quality x7r ceramic capacitors while retaining adequate transient response for most applications. the 48 volt pi31xx does not require any feedback loop compensation nor does it require any opto- isolation. all isolation is contained within the package. this greatly simplifies the use of the converter and eliminates all outside influences of noise on the quality of the output voltage regulation and feedback loop. it is important for the user to minimize resistive connections from the load to the converter output and to keep stray inductance to a minimum for best regulation and transient response. the very small size footprint and height of the 48 volt pi31xx allows the converter to be placed in the optimum location to allow for tight connections to the point of load. for those applications absolutely requiring very tight regulation, contact picor engineering at picorpower.com for a remote sense application circuit which can be used. cool-power ? rev 1.2 vicorpower.com page 21 of 22 02/2015 800 927.9474 48 volt pi31xx package outline & recommended pcb land pattern figure 33 ? package outline & recommended pcb land pattern 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 requirements , 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. the products described on this data sheet are protected by the following u.s. patents numbers: 6,788,033; 7,154,250; 7,561,446; 7,361,844; d496,906; d506,438; 6,940,013; 7,038,917; 6,969,909; 7,166,898; 6,421,262; 7,368,95 7; re 40,072 vicor corporation 25 frontage road andover, ma 01810 usa picor corporation 51 industrial drive north smithfield, ri 02896 usa email customer service: custserv@vicorpower.com technical support: apps@vicorpower.com 48 volt pi31xx cool-power ? rev 1.2 vicorpower.com page 22 of 22 02/2015 800 927.9474 |
Price & Availability of PI3101-00-HVIZ-16
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