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VI-ARM-T22 Datasheet(PDF) 6 Page - Vicor Corporation |
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VI-ARM-T22 Datasheet(HTML) 6 Page - Vicor Corporation |
6 / 12 page Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 ARM, Autoranging Rectifier Module Rev. 2.4 Page 6 of 12 Set your site on VICOR at www.vicorpower.com Figure 8—Converter connections +In Gate In (PC) Gate Out (PR) –In +In Gate In (PC) Gate Out (PR) –In N ST L +V BOK EN –V Vicor DC-DC Converter VI-ARM R1 R2 C1 C2 V1 V2 D2 D1 C3 C5 C4 C6 F1 F2 Vicor DC-DC Converter To additional modules C7* C8* Part C1,2 C3–6 R1,2 V1,2 F1,2 D1,2 C7,8 Z1 D3,D4 C10,C11 R3 Description Holdup capacitors 4700pF 150kΩ, 0.5W 220V MOV 3A, PC Tron Diode Film Cap., 0.8µf MOV 1N5817 0.001µF 500Ω Vicor Part Number see text 01000 00127-1503 13755 02178 00670 03040 26108 Sizing PCB traces: All traces shown in bold carry significant current and should be sized accordingly. VI-ARM- _12 N/ST/L +/– In 10A rms at 90Vac and 500W 4A DC at 190Vdc and 750W Required if C1 & C2 are located more than 6 inches from output of VI-ARM. * Z1 * Filter Holdup Box (HUB) 820µF HUB820-S, 2200µF HUB2200-S 1200µF HUB1200-S, 2700µF HUB2700-S 1800µF HUB1800-S, 3300µF HUB3300-S 20A rms at 90Vac and 1000W 8A DC at 190Vdc and 1500W VI-ARM- _22 N/ST/L +/– In R3 C10 D3 C11 D4 Application Note, continued Off-Line Power Supply Configuration The ARM maintains the DC output bus voltage between 200 and 375Vdc over the entire universal input range, which is compatible with Vicor VI-260 series and VI-J60 series DC-DC converters, as well as next-generation 300V input Vicor converters. The ARM automatically switches to the proper rectification mode (doubled or undoubled) depending on the input voltage, eliminating the possibility of damage due to improper line connection. The ARM–1 is rated at 500W in the low range (90-132Vac input), and 750W in the high range (180-264Vac input). The ARM–2 is rated for 1000W and 1500W for the low and high input ranges respectively. Either of these modules can serve as the AC front end for any number and combination of compatible converters as long as the maximum power rating is not exceeded. Strap (ST) Pin. In addition to input and output power pin connections, it is necessary to connect the Strap pin to the junction of the series holdup capacitors (C1, C2, Fig. 8) for proper (autoranging) operation. Gas tubes across the capacitors provide input transient protection. The bleeder resistors (R1, R2, Fig. 8) discharge the holdup capacitors when power is switched off. Enable (EN) Pin. (See Fig. 9). The Enable pin must be connected to the Gate-In or PC pin of all converter modules to disable the converters during power-up. Otherwise, the converters would attempt to start while the holdup capacitors were being charged through an unbypassed thermistor, preventing the bus voltage from reaching the thermistor bypass threshold thus disabling the power supply. The Enable output (the drain of an N channel MOSFET) is internally pulled up to 15V through a 150k Ω resistor. A signal diode should be placed close to and in series with the Gate-In pin of each converter to eliminate the possibility of control interference between converters. The Enable pin switches to the high state (15V) with respect to the negative output power pin to turn on the converters after the power-up inrush is over. The Enable function also provides input overvoltage protection for the converters by turning off the converters if the DC bus voltage exceeds 400Vdc. The thermistor bypass switch opens if this condition occurs, placing the thermistor in series with the input voltage, which reduces the bus voltage to a safe level while limiting input current in case the gas tubes fire. The thermistor bypass switch also opens if a fault or overload reduces the bus voltage to less than 180Vdc. |
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