pascall electronics limited westridge business park cothey way ryde, isle of wight po33 1qt uk tel +44 (0) 1983 817300 fax +44 (0) 1983 564708 email enquiries@pascall.co.uk www.pascall.co.uk electronics limited 03/07 a subsidiary of emrise electronics 500 watt single and multi output ac/dc converters single, dual or triple outputs 108 - 118 volts input active power factor correction emc compatibility to mil-std-461c high power density operating temperature -55oc to +100oc low output noise utilises surface mount technology remote on/off e xternal synchronisation facility high efficiency (>70%) fixed switching frequency hi-rel versions available designed to navmat guidelines semi - custom options available caa-500 cae-500 CAF-500 +5v +5v 50.0a +5v 50.0a 100.0a 12v 10.4a 15v 8.3a 5 5 5 ac input output voltages & currents case code this series of switch-mode ac-dc power converters provides the military electronics designer with a highly specified, cost effective and space efficient solution for airborne, shipboard and ground based applications. these converters accept a wide input voltage range, conforming with standard military 115v ac supplies and are available in single, and triple output configurations. in order to satisfy military requirements the powermite series has been designed and tested in accordance with stringent navmat guidelines to provide exceptional electrical and environmental performance. _
electronics limited input voltage: input power characteristics power factor isolation efficiency output voltages load, line & temperature regulation (ceb) noise and ripple (pard) total effect band (teb) cross regulation dynamic load regulation dynamic line regulation minimum load conditions output protection remote sense output overvoltage protection soft start synchronisation 108v to 118v single phase 400hz. for operation from 50/60hz supplies can be accomodated by means of an external capacitor. please contact our sales office for further details. mil-std-704e, transients as per figure 4, including voltage spikes specified in mil-e-6051. bs3g100, excluding limit 1 of variable frequency and limit 2 of variable or constant frequency. incorporates active power factor correction circuitry and achieve a power factors in excess of 0.95. input to output > 10m ? @ 1kvdc input to chassis > 10m ? @ 1kvdc outputs to chassis > 10m ? @ 500vdc not less than 70% at full load, nominal input voltage and at 25oc baseplate temperature. see output rating table for details. other v/a combinations are available. contact sales team for further information. prime output 2% of output voltage auxillary outputs 2% of output voltage measured over bandwidth dc-20mhz prime output 2% of output voltage auxillary outputs 2% of output voltage total combination of ceb + pard + drift and warm-up. prime output 5% of output voltage auxillary outputs 5% of output voltage prime output 2% of output voltage auxillary outputs 2% of output voltage maximum transient over or undershoot of 5% of nominal output voltage for a 50% step load change in 20 s. recovery within 1ms. maximum transient over or undershoot of 5% of nominal output voltage with recovery within 1ms for all line transients and surges defined in input power characteristics above. for full specified performance. prime output 10% of maximum current. auxillary outputs 10% of maximum current. individual outputs are protected against indefinite overload and short circuit. current limiting circuitry operates at 110-130% of full rated current. output voltages recover automatically following removal of overload. fitted as standard on the prime output only. all outputs are protected by means of zener diode clamps. these limit the output voltage to 120%, typically, of the nominal value. under all conditions the converters start up in an orderly fashion. rise time of supplies is less than 10ms. these modules can be synchronised to an external source or to other modules in the powermite range. (synchronisation frequency = 400khz 5%) 500 watt single and multi output ac/dc converters
electronics limited undervoltage lockout remote shutdown hold up emi operating temperature storage temperature cooling humidity construction weight and dimensions vibration acceleration shock salt mist explosion proofness nuclear hardening maintainability mtbf shelf life burn in to protect internal circuits against low input voltages, the converters will not operate below an input of 13v dc. connecting the shutdown terminal to a voltage of ( 0.4v) with respect to the output return terminal, will cause the unit to shutdown. leaving the terminal open circuit or connecting it to a logic high signal (3v to 5.5v) will allow the unit to operate. on dc models pins are provided which permit the connection of an external hold-up capacitor. the units are designed to meet the following requirements of mil-std-461c, part 2, category a1b : ceo1 ce03 ce07, cs01 cs02 cs06, re02 rs02 rs03 full specified performance with the baseplate temperature maintained within the range -55 o c to +100 o c. -55 o c to +125 o c conduction cooling via baseplate. mil-std-810c, method 507.3, 95% at 25 o c. bs3g100, part 2, section 3, sub-section 3.2, para 6.2. fully enclosed construction utilising aluminium alloy lm25m to bs1490. paint finish matt black to dtd 5555a. mounting surface alochromate finish. the maximum weight is 2400 grams. refer to outline drawing for unit dimensions and fixing positions. mil-std-810e, method 514.4 category 5. bs3g100, part 2, section 3, sub-section 3.1, tests 4.3, 4.4.2 and 4.4.4. mil-std-810e, method 513.4 procedure 11. bs3g100, part 2, section 3, sub-section 3.6. mil-std-810e, method 516.4 procedure v. def-stan-07-55 part 2, section 1.1, test a2 (100g, 6ms, 3 shocks per axis). bs3g100, part 2, section 3, sub-section 3.8. bs3g100, part 2, section 3, sub-section 3.5. the circuitry of all powermite converters is designed to limit the effects of nuclear radiation. units are constructed in a non-hermetically sealed two part housing. internal circuitry is protected by means of conformal coating. all powermite modules are repairable. the mtbf for any unit in the powermite range, calculated in accordance with mil-hdbk-217, can be provide upon request. hi-rel versions with active components screened to jantx, mil-std-883 or similar are available. the shelf life of the units is ten years, they may be left in deep store, without the need for intermittent powering-up or any form of servicing for the period of the shelf life. all units are subjected to an environmental stress screening programme. for standard versions this consists of a 48 hour bake at 85 o c baseplate temperature. high reliability versions are subjected to 10 minutes of random vibration followed by 48 hours of power and temperature cycling between -55 o c and +85 o c, with full load applied. 500 watt single and multi output ac/dc converters
electronics limited outline dimensions dimensions in mm 1. achi 2. ac-lo 3. + 4. - 5. chassis 6. - 7. + 8. shutdown 9. frequency shift 10. sync in 11. sync out 12. - 13. + 14. - 15. + 16. - 17. + ) remote sense ) input ) hold-up ) prime output ) aux 1 ) aux 2 further information a detailed specification is available upon request. please contact our sales office. pin designations 500 watt single and multi output ac/dc converters
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