ATCR250 series 250 watt half-brick isolated dcdc converter total power: 250 watts input voltage: -48 vdc output : 12 v intermediate bus 3.3 v management bus special features ? optimized footprint for high density atca applications ? accepts inputs from -48 v a and b feeds ? cispr class a emi ? adjustable hold up voltage from 50 - 80 vdc ? i 2 c serial bus interface for monitoring and reporting ? programmable alarm thresholds via i 2 c bus ? hardware alarms via opto-isolators for loss of a or b feeds ? comprehensive protection circuitry: current, voltage and temperature ? eu directive 2002/95/ec compliant for rohs safety ? ul/cul 60950-1 ? tv en60950-1 data sheet electrical specifcations input input ra nge -36 v to -72 vdc transient -100 vdc (< 1 ms) external input capacitance 82 f max inrush current 11 a typical inrush duration < 2 ms undervoltage lockout -36 < vin overvoltage lockout -77.5 < vin < 72 vdc effciency 89% @ 250 w output 12 v intermediate bus 3.3 v management bus nominal setpoint 12.2 v 3.32 v total regulation band 1 11.4 - 12.6 v 3.20 - 3.40 v output current 0 - 20.83 a 0 - 4.5 a current limit 118% io, max (typ) 130% io, max (typ) short circuit shutdown/autorecovery ripple and noise 2 50 mv pk-pk 40 mv pk-pk overvoltage vo > 13.4 vdc vo > 3.6 vdc (typ) undervoltage na vo < 3.0 vdc (typ) external output capacitance 1000 f min 100 f min control/monitoring on/off+ and on/off- i 2 c serial bus interface remote activation of module. see ATCR250 application note. for digital monitoring (vout, vin, temp, iin) referenced to secondary side. isolation characteristic input to output isolation voltage 2250 vdc input to output insulation basic power
environmental specifcations operating ambient temperature range -25 c to +85 c ambient storage temperature -40 c to +125 c mtbf > 1 mhrs @ 25 c 100% load (target) notes: 1. regulation band over line, load and temperature. 2. measured at 20 mhz with external 10 mf tantalum in parallel with 1 mf ceramic, 25v rated low esr type capacitors across each output. 3. all specifications are typical at nominal line, ta = 25 c unless otherwise indicated. 4. all specifications are subject to change without notice. 5. technical reference notes and application notes should be consulted for complete product details 6. warranty 2 years. part number system with options atcr 250 48 d12-03 j product family atca product series product family rohs 6/6 product family dual output: 12.0 v @ 20.83 a intermediate bus 3.3 v @ 4.5 a management bus product family -36 to 72 vdc product family 250 watts pin assignments pin # pin name function note 1 -48va power input from a bus connects to atcazone 1 connector pin 33 via external 12 a fuse 2 -48vb power input from b bus connects to atcazone 1 connector pin 34 via external 12 a fuse 3 reserved for future use 4 hold up trim hold up voltage trim connects a resistor between this pin and pin 11 to trim hold up voltage 5 rtn a power return from a bus connects to atcazone 1 connector pin 28 via external 15 a fuse 6 rtn b power return from b bus connects to atcazone 1 connector pin 29 via external 15 a fuse 7 ena when connected to rtn a, turns on isolated open collector a enabled device (see note 3) connects to atcazone 1 connector pin 32 via external 1 a fuse. used to signal to management system correct board insertion and presence of a bus 8 enb when connected to rtn b, turns on isolated open collector b enabled device (see note 3) connects to atcazone 1 connector pin 27 via external 1 a fuse. used to signal to management system correct board insertion and presence of b bus 9 c_cl- connection to module of auxiliary capacitor hold up array -ve utilizes greater capacitance in a given can size of lower voltage capacitors. clamped to -50v wrt hu+out when pin 4 is open. 10 hu- connection to module of hold up capacitor array -ve 11 hu+out connection from on board flter and management circuits to hold up capacitor array +ve may also connect to input of boost module to reduce hold up storage area 12 hu+in connection to main power converter from hold up capacitor array +ve may also connect to output of boost module to reduce hold up storage area 13 on/off- current from pin to turn main output on fully foating remote on/off signal, may be used with management system or atca enable_a/b via r-d network 14 on/off+ current into pin to turn main output on fully foating remote on/off signal, may be used with management system or atca enable_a/b via r-d network 15 b_ok# open collector signal, monitors status of b feed low when ok 16 a_ok# open collector signal, monitors status of a feed low when ok 17 a2 i 2 c lines, address strapping 18 intrpt interrupt alarm i 2 c register out of limits, lm80 pin int# direct connection 19 a1 i 2 c lines, address strapping 20 scl clock i 2 c lines, clock line input 21 a0 i 2 c lines, address strapping 22 sda data i 2 c lines, serial data 23. 24 3v3 return management power return and i 2 c also return for a_ok# and b_ok# signals externally connected to atca zone 1 connector pin 26 25, 26 3v3 out 3v3, 14.85 w management power 27, 28 3v3 trim trim pin for management power 29 12v rtn 12 v return externally connected to atca zone 1 connector pin 26 30 12v out 12 v power ATCR250 series data sheet
mechanical drawings ATCR250 series 07may2015 ATCR250 series data sheet worldwide offices americas 2900 s.diablo way tempe, az 85282 usa +1 888 412 7832 europe (uk) waterfront business park merry hill, dudley west midlands, dy5 1lx united kingdom +44 (0) 1384 842 211 asia (hk) 14/f, lu plaza 2 wing yip street kwun tong, kowloon hong kong +852 2176 3333 for more information: www.artesyn.com/power for support: productsupport.ep@artesyn.com www.artesyn.com while every precaution has been taken to ensure accuracy and completeness in this literature, artesyn embedded technologies assumes no responsibility, and disclaims all liability for damages resulting from use of this information or for any errors or omissions. artesyn embedded technologies, artesyn and the artesyn embedded technologies logo are trademarks and service marks of artesyn embedded technologies, inc. all other names and logos referred to are trade names, trademarks, or registered trademarks of their respective owners. ? 2015 artesyn embedded technologies, inc.
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