wall industries, inc. 5 watson brook road exeter, nh 03833 603- 778 - 2300 www.wallindustries.com fax 603-778- 9797 page 1 of 3 kr/krw series single and dual outputs 6 watt dc/dc converte rs 2:1 and 4:1 wide input voltage range rev c f eatures high efficiency up to 83% fixed switching frequency six - sided continuous shield standard 2 x 1 x 0.4 inch package 2:1 a nd 4:1 wide input voltage range i so9001 certified manufacturing facilities compliant to rohs eu directive 2002/ 95/ec options: positive logic and negative logic remote on/off, industrial temperature specifications: kr/krw series all specifications apply @ 25c ambient unless otherwise noted input specifications input voltage range kr .... .......................... 12v nominal input ............................. 9- 18 vdc 24v nominal input ........................... 18- 36vdc 48v nominal input ........................... 36- 75vdc k rw ........................... 24v nominal input ............................. 9- 36vdc 48v nominal input ........................... 18- 75vdc input filter ..................................................................................... pi type input surge voltage (100ms max) ....... 12v input .......................... 36 vdc 24v input .......................... 50 vdc 48v input ........................ 100 vdc input reflected ripple current (nom. vin and fl) ....................... 20map -p start up time (nom. vin and constant resistive load) ............. 450ms max. remote on/off (option) (see note 6) ( positive logic) ............... dc- dc on ............ open or 3.5v < vr < 12v dc - dc off ............ short or 0v < vr < 1.2v ( negative logic) ............. dc- dc on .............. s hort or 0v < vr < 1.2v dc - dc off .......... open or 3.5v < vr < 12v input current of remote control pin (nominal vin) ........... - 0.5ma ~ +1ma remote off state input current (nominal vin) ................................ . 2.5ma output specifications output voltage ............................................................................ see table voltage accuracy (nominal vin and full load) ...................................... 1% output current ............................................................................ see table output power ....................................................................... 6 watts max. line regulation (ll to hl at fl) ...................................................... 0.2% load regulation (no load to full load) .......... single output .............. 0.2% d ual output ................... 1% cross regulation (dual) (asymmetrical load 25% / 100% fl) ............ 5% minimum load ...................................................................................... 0% ripple/noise (20 mhz bw) .......................................................... 50mvp -p temperature coefficient ................................................. 0.02% / c max. transient response recovery time 25% load step change .................................................. (single) 200us f l to hl 1% error band (dual) 200us prot ection specifications over load protection (% of full load at nom. input) .................... 170% typ. short circuit protection. .......................... continuous, automatic recovery general specifications efficiency ..................................................................................... see table switching frequency kr .... ................................................................................... 300khz typ. k rw ................................................................................... 200khz typ. isolation voltage (input to output) ........................................ 1600vdc min. isolation resistance ............................................................. 10 9 ohms min. isolation capacitance ............................................................... 300pf max. environmental specifications operating temperature s tandard .................................................. - 25c ~ +85c (with derating) ? i? suffix (see note 7) ................................ - 40c ~ +85c (non - derating) ?i ? suffix (krw series) .............................. - 40c ~ +85c (with derating) storage temperature ......................................................... - 55c ~ +105c maximum case temperature ............................................................ 100c relative humidity ................................................................ . 5% to 95% rh thermal impedance (see note 8) n atural convection ............................................................ 12c / watt n atural convection with heat - sink .................................... 10 c / watt thermal shock ................................................................... mil - std - 810f vibration ................................ 10~55hz, 10g, 30 minutes along x, y, and z mtbf (see note 1) ......................................................... 3.145 x 10 6 hours physical specifications weight .................................................................................... 27g (0.95 oz) dimensions ...................... 2.0 x 1.0 x 0.40 inches (50.8 x 25.4 x 10. 2 mm) case material ............................................................. nickel - coated copper base material ................................................. non - conductive black plastic potting material ................................................................ epoxy (ul94 - v0) shielding ....................................................................................... six - sided safety & emc approvals and standards .................. iec60950 - 1, ul60950 - 1, en60950 -1 emi .................................... en55022 ............................................. class a esd ................... en61000 -4-2??.. ??. perf. criteria b radiated immunity ............. en61000 -4-3 .............. 10v/m perf. criteria a fast transient .................... en61000 -4-4 ................ 2kv perf. criteria b surge (see note 9) ............ en61000 -4-5 ................ 1kv perf. criteria b conducted immunity .......... en61000 -4-6 ............ 10 vrms perf. criteria a due to advances in technology, specifications subject to change without notice air 8kv contact 6 kv applications measurement wireless network telecom/datacom industry control system semiconductor equipment
wall industries, inc. 5 watson brook road exeter, nh 03833 603- 778 - 2300 www.wallindustries.com fax 603-778- 9797 page 2 of 3 kr/krw series single and dual outputs 6 watt dc/dc converte r s 2:1 and 4:1 wide input voltage range rev c model selection guide model number input range output voltage output current output ( 4) ripple & noise input current efficiency ( 4 ) capacitor ( 5 ) load max min. load full load no load ( 3) full load ( 2) kr12s33 - 1000 12 vdc (9 ? 18 vdc) 3.3 vdc 0ma 1000ma 50mvp - p 10ma 382ma 76 3700f 1700f 290f 188f 850f 140f 47f 3700f 1700f 290f 188f 850f 140f 47f 3700f 1700f 290f 188f 850f 140f 47f 3700f 1700f 290f 188f 850f 140f 47f 3700f 1700f 290f 188f 850f 140f 47f notes 1. bellcore tr - nwt - 000332. case 1 : 50% stress, temperature at 40 oc. (ground fixed and controlled environment) 2. maximum value at nominal input voltage and full load of standard type. 3. typical value at nominal input voltage and no load. 4. typical value at nominal i nput voltage and full load. 5. test by minimum vin and constant resistive load. 6. the on/off control pin voltage is referenced to - vin. to order positive logic on - off control add the suffix ?p? (ex: kr48s5 - 1000p) to order negative logic on - off control add the suffix ?r? (ex: kr48s5 - 1000r) 7. the industrial ?i? suffix for the 2:1 input version is more efficient; therefore , it can be operated in a more extensive temperature range than ? standard? and ?i? suffix 4:1 input version s . to ord er industrial temperature range ( - 40c ~ +85c) add the suffix ?i? to the part number (ex: kr48s5 -1000i ) 8. heat sink is optional, consult factory. 9. an external filter capacitor is required if the module has to meet en61000 -4 - 5. the filter capacitor w all industries suggest s : nippon chemi - con ky series 220 f/100v esr 48m.
wall industries, inc. 5 watson brook road exeter, nh 03833 603- 778 - 2300 www.wallindustries.com fax 603-778- 9797 page 3 of 3 kr/krw series single and dual outputs 6 watt dc/dc converte r s 2:1 and 4:1 wide input voltage range rev c derating curve & efficiency graphs mechanical drawing unit: inches (mm) 0.40 0 (10. 16 ) 0.40 0 (10. 16 ) 0.50 (12.7) 1.00 (25.4) 0.40 (10.2) dia. 0.04 (1.0) 1. tolerance: x.xx 0.02 (x.x 0.5) x.x x x 0.0 1 (x.x x 0. 2 5) 2. pin pitch tolerance 0.01 ( 0. 2 5) 3. pin dimension tolerance 0. 004 ( 0.1 ) 2.00 (50.8) 0.10 0 (2.5 4 ) 0.20 0 (5. 08 ) 0.80 0 (20.3 2 ) 0.60 (15.2) 0.22 (5.6) 1 2 3 4 5 6 bottom view pin connection pin single dual 1 +vin +vin 2 - vin - vin 3 +vout +vout 4 no pin common 5 - vout - vout 6 control (option) control (option)
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