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70IMX4 Datasheet(PDF) 4 Page - Power-One |
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70IMX4 Datasheet(HTML) 4 Page - Power-One |
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4 / 12 page  ® IMX4 Series Data Sheet 4 Watt DC-DC Converters BCD20006-G Rev AC, 06-Jul-2012 Page 4 of 12 www.power-one.com Table 3: Input electrolytic capacitors Model 20IMX4 40IMX4 70IMX4 C i 100 µF 47 µF 330 µF 50 V 100 V 200 V Electrical Input Data General conditions: TA = 25 °C, unless TC is specified. Table 2: Input Data Input 5I MX4 20IMX4 40IMX4 70IMX4 Unit Characteristics Conditions min typ max min typ max min typ max min typ max Vi Input voltage range TC min to TC max 4.7 5.0 16.8 8.4 36 16.8 2 75 40 121 VDC Vi nom Nominal input voltage Io = 0 to Io nom 5.0 20 40 70 Vi sur Repetitive surge voltage abs. max input (3 s) -- 40 100 150 tstart-up Converter start-up time1 Worst case condition at 0.25 0.5 0.25 0.5 0.25 0.5 0.25 0.5 s Vi min and full load trise Rise time 1 Vi nom resistive load -- 5 5 5 ms Io nom capacitive load -- 12 12 12 Ii o No-load input current Io = 0, Vi min to Vi max -- 15 20 5 10 5 10 mA C i Input capacitance -- 0.54 0.3 0.15 µF Iinr p Inrush peak current Vi = Vi nom 3 3.8 3.7 4.2 5.6 A fs Switching frequency Vi min to Vi max, Io = 0 to Io nom 400 400 400 400 kHz Ii rr Reflected ripple current Io = 0 to Io nom -- 100 60 30 mApp vi RFI Input RFI level EN 55011/55022 4 -- A A A Class conducted 1 Measured with a resistive or max. admissible capacitive load; see fig. 5 2 Operation at lower input voltage possible: Po approx. 80% of Po nom at Vi min = 14.4 V 3 Source impedance according to ETS 300132-2, version 4.3. 4 External capacitors required according to table 3. Fig. 5 Converter start-up and rise time Inrush Current The inrush current has been kept as low as possible by choosing a very small input capacitance. A series resistor may be inserted in the input line to further limit this current. Fig. 6 Typ. inrush current at Vi nom, Po nom versus time measured according to ETS 300132-2, version 4.3 (40IMX4). Fig. 7 Input capacitors A 0 10 20 30 40 µs 04034a 0 1 2 3 Start-up Filter to Comply with EN 55011/55022 Electromagnetic emission requirements according to table Electrical Input Data can be achieved by adding an external capacitor as close as possible to the input terminals (see fig. 7 and table 3). Vi+ Vi– Ci 04035b + Vo nom Vo tstartup trise t 04008b |
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