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VI-ARM-M1N Datasheet(PDF) 7 Page - Vicor Corporation |
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VI-ARM-M1N Datasheet(HTML) 7 Page - Vicor Corporation |
7 / 12 page Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 ARM, Autoranging Rectifier Module Rev. 2.4 Page 7 of 12 Set your site on VICOR at www.vicorpower.com Application Note, continued +In Gate In (PC) Gate Out (PR) –In N ST L +V BOK EN –V Vico DC-D Conver Micro- controller 15Vdc 150kΩ To additional modules Figure 9—Enable (EN) function; See Fig.8 for details +In Gate In (PC) Gate Out (PR) –In N ST L +V BOK EN –V D Co Micro- controller 15Vdc 27kΩ +5 Vdc Secondary referenced To additional modules Figure 10—Bus OK (B OK) isolated power status indicator N ST L C2 R4 C4 L2/N L1 GND L1 R3 L2 R1 R2 L3 C1 C3 F1 Z1 Part C1 C2, C3 C4 F1 L1, L2 L3 R1, R2 R3 R4 Z1 Description 1.0µF 4700pF 0.15µF 12A fuse 27µH 1.3mH 10Ω 150kΩ, 0.5W 2.2Ω MOV Vicor Part Number 02573 01000 03269 05147 14563 15016 00127-1503 03040 Figure 11—Filter connections Bus-OK (B OK) Pin. (See Fig. 10). The Bus-OK pin is intended to provide early-warning power fail information and is also referenced to the negative output pin. Caution: There is no input to output isolation in the ARM. It is necessary to monitor Bus-OK via an optoisolator if it is to be used on the secondary (output) side of the converters. A line isolation transformer should be used when performing scope measurements. Scope probes should never be applied simultaneously to the input and output as this will destroy the unit. Filter. Two input filter recommendations are shown for low power VI-ARM-1 and high power VI-ARM-2 (See Fig. 11). Both filter configurations provide sufficient common mode and differential mode insertion loss in the frequency range between 100kHz and 30MHz to comply with the Level B conducted emissions limit. Hold-up Capacitors. Hold-up capacitor values should be determined according to output bus voltage ripple, power fail hold-up time, and ride-through time. (See Fig. 12). Many applications require the power supply to maintain output regulation during a momentary power failure of specified duration, i.e., the converters must hold-up or ride-through such an event while maintaining undisturbed output voltage regulation. Similarly, many of these same systems require notification of an impending power failure in order to allow time to perform an orderly shutdown. The energy stored on a capacitor which has been charged to voltage V is: ε = 1/2(CV2) (1) Where: ε = stored energy C = capacitance V= voltage across the capacitor Energy is given up by the capacitors as they are discharged by the converters. The energy expended (the power-time product) is: ε = P∆t = C(V 1 2–V 2 2) / 2 (2) Where: P = operating power ∆t = discharge interval V1 = capacitor voltage at the beginning of ∆t V2 = capacitor voltage at the end of ∆t Rearranging equation 2 to solve for the required capacitance: C = 2P ∆t / (V1 2–V 2 2) (3) Part L1,L4 L2, L3 C1 C2,C3,C4,C5 C6 R1 R2 F1 Z1 Description 1000µH 12A/6.5MΩ 22µH .68µf (x type) 4700pf .22µf (x type) 390k 1/2 W 10Ω 1/2 W 17A/250V MOV 03040 Vicor Part Number 02134 11479 02573 03285 04068 C2 4700pF C4 4700pF R1 C3 4700pF C5 4700pF C6 .22µF (X2) L4 L2 L1 L3 R2 10 1/2W C1 390K 1/2W L1 L2/N GND F1 N ST L Z1 High power filter connections Low power filter connections Vicor DC-DC Converter Vicor DC-DC Converter |
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