FARM VICOR | Alldatasheet

Document overview

  • Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
  • PDF pages: 12

Technical content

Features

  • EMI filtering
  • Choice of 500W or 750W modules
  • 96% Efficiency
  • Autoranging 115/230Vac input
  • Microprocessor controlled
  • Inrush current limiting
  • Mini sized package
  • Power fail signal
  • Module enable Product Highlights The FARM (Filter/Autoranging Rectifier Module) is an AC front-end module which provides EMI filtering, autoranging line rectification and inrush current limiting. The FARM is available in either 500/750W or 750/1000W models in a mini sized package measuring only 2.28" x 2.2" x 0.5". The FARM interfaces directly with worldwide AC mains and may be used with Vicor 1st or 2nd Generation 300V input DC-DC converters to realize an autoranging, high density, low profile switching power supply. The FARM includes a microcontroller that continuously monitors the AC line to control bridge/doubler operation. The user need only provide external capacitance to satisfy system hold-up requirements. Vicor 2nd Generation packaging technology offers flexible mounting options for various manufacturing processes. The FARM may be installed as a conventional leaded device for on-board applications, in-board for low profile, height restricted applications, socketed or surface mounted with optional ModuMate interconnect products. Data Sheet FARM TM Filter/ Autoranging Rectifier Module Up to 1000 Watts Shown actual size: 2.28 x 2.2 x 0.5 in 57,9 x 55,9 x 12,7 mm Absolute Maximum Rating Thermal Resistance and Capacity Parameter Min Typ Max Unit Baseplate to sink; flat, greased surface 0.16 °C/Watt Baseplate to sink; with thermal pad (P/N 20264) 0.14 °C/Watt Baseplate to ambient 8.0 °C/Watt Baseplate to ambient; 1000 LFM 1.9 °C/Watt FARM 1 C 1 1 Product Type 1 = 500/750W 2 = 750/1000W Baseplate 1 = Slotted 2 = Threaded 3 = Thru-hole Pin Style* 1= Short Pin 2= Long Pin S= Short ModuMate N= Long ModuMate Product Grade C = –20°C to +100°C T = –40°C to +100°C Part Numbering *Pin styles S & N are compatible with the ModuMate interconnect system for socketing and surface mounting.

Vicor Corp.Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 FARM, Filter/Autoranging Rectifier Module Rev. 4.7 Page 2 of 12 Set your site on VICOR at www.vicorpower.com PRELIMINARY Parameter Min Typ Max Unit Notes Operating input voltage 90 132 Vac Autoranging (doubler mode) Operating input voltage 180 264 Vac Autoranging (bridge mode) Input undervoltage 90 Vac No damage AC line frequency 47 63 Hz C–Grade AC line frequency 47 880 Hz T–Grade Power factor 0.60 0.65 Typical line Inrush current FARM1xxx 30 Amps 264Vac peak line, cold start FARM2xxx 60 Amps 264Vac peak line, cold start Input surge withstand 2kV–50 µs common mode EN61000-4-51kV–50 µs differential mode SAFETY SPECIFICATIONS (FARM1xxx, FARM2xxx) MODULE INPUT SPECIFICATIONS (FARM1xxx, FARM2xxx) MODULE OUTPUT SPECIFICATIONS

Electrical Characteristics

Electrical characteristics apply over the full operating range of input voltage, output power and baseplate temperature, unless otherwise specified. All temperatures refer to the operating temperature at the center of the baseplate. Specifications apply for AC mains having up to 5% total harmonic distortion. Parameter Min Typ Max Unit Notes Safety approvals UL 1950, CSA 22.2 No. 950, TÜV, VDE, EN60950, CE Marked Isolation voltage (in to out) None Isolation provided by DC-DC converter(s) Isolation voltage (I/O to baseplate) 1500 Volts, rms Leakage current 1.2 mA 264Vac FARM1xxx FARM2xxx Parameter Min Typ Max Min Typ Max Unit Notes Output power 0 500 0 750 Watts 90-132Vac Output power 0 750 0 1000 Watts 180-264Vac Efficiency, 120Vac 94 96 94 96 % Efficiency, 240Vac 94 96 94 96 % Output voltage 250 370 250 370 Vdc 90-264Vac Hold-up capacitance 1,800 3,300 µF

Set your site on VICOR at www.vicorpower.com PRELIMINARY Vicor Corp.Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 FARM, Filter/Autoranging Rectifier Module Rev. 4.7 Page 3 of 12 Electrical Characteristics (continued) MODULE CONTROL SPECIFICATIONS MODULE GENERAL SPECIFICATIONS Parameter Min Typ Max Unit Notes AC Bus OK (B OK) Low state resistance 15 Ω To negative output - Bus normal Low state current 50 mA Bus normal High state voltage 14.8 15.0 15.2 Vdc Bus abnormal, 27K internal pull up to 15Vdc (see Fig.11) B OK true threshold 235 240 245 Vdc Output Bus voltage B OK false threshold 200 205 210 Vdc Output Bus voltage Module Enable (EN) Low state resistance 15 Ω To negative output - Converters disabled Low state current 50 mA High state voltage 14.8 15.0 15.2 Vdc 150K internal pull up to 15Vdc (see Fig. 10) Enable threshold 235 240 Vdc Output bus voltage Disable threshold 185 190 195 Vdc Output bus voltage AC Bus OK - Module Enable, differential error* 15 17 20 Vdc AC Bus OK and Module Enable thresholds track Parameter Min Typ Max Unit Notes MTBF >1,000,000 Hours 25˚C, Ground Benign Baseplate material Aluminum Cover Polyetherimide Pin Material Copper, Tin/lead solder dipped Weight 3.1(88) Ounces (grams) Size 2.28 x 2.2 x 0.5 Inches 57,9 x 55,9 x 12,7 (mm) Storage Temperature (C, T-Grade) -40 +125 °C Operating Temperature (C-Grade) -20 +100 °C Baseplate (T-Grade) -40 +100 °C Baseplate * Tracking error between BUS OK and Enable thresholds

Set your site on VICOR at www.vicorpower.com PRELIMINARY Vicor Corp.Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 FARM, Filter/Autoranging Rectifier Module Rev. 4.7 Page 5 of 12 The Filtered, Autoranging Rectifier Module (FARM) provides an effective solution for the AC front end of a power supply built with Vicor DC-DC converters. This high performance power system building block satisfies a broad spectrum of requirements and agency standards. In addition to providing transient/surge immunity and EMI filtering, the FARM contains all of the power switching and control circuitry necessary for autoranging rectification, inrush current limiting, and overvoltage protection. This module also providesconverter enable and status functions for orderly power up/down control or sequencing. To completethe AC front end configuration, the user only needs to add hold-up capacitors, and a few discrete components. Functional Description Power-Up Sequence.(see Fig. 8): Upon application of input power, the output bus capacitors begin to charge. The thermistor limits the charge current, and the exponential time constant is determined by the hold-up capacitor value and the thermistor cold resistance. The slope (dv/dt) of the capacitor voltage versus time approaches zero as the capacitors become charged to the peak of the AC line voltage. The switch that bypasses the inrush limiting PTC (positive temperature coefficient) thermistor is open when power is applied, as is the switch that engages the strap for voltage doubling. (see Fig. 7).In addition, the converter modules are disabled via the Enable (EN) line, and Bus-OK (BOK) is high. If the bus voltage is less than 200V as the slope nears zero, the voltage doubler is activated, and the bus voltage climbs exponentially to twice the peak line voltage. If the bus voltage is greater than 200V , the doubler is not activated. If the bus voltage is greater than 235V as the slope approaches zero, the inrush limiting thermistor is bypassed. Below 235V , it is not bypassed. The converters are enabled 50 milliseconds after the thermistor bypass switch is closed. Bus-OK is asserted after an additional 50 millisecond delay to allow the converter outputs to settle within specification. Power-Down Sequence. (see Fig. 8)When input power is turned off or fails, the following sequence occurs as the bus voltage decays: Bus-OK is deasserted when the bus voltage falls below 210Vdc. The converters are disabled when the bus voltage falls below 190Vdc. If power is reapplied after the converters are disabled, the entire power-up sequence is repeated. If a momentary power interruption occurs and power is reestablished before the bus reaches the disable threshold, the power-up sequence is not repeated, i.e., the power conversion system “rides through” the momentary interruption. Application Note Microcontroller N L PTC Thermistor +Out –Out Strap EN BOK Strap 400 300 200 100 90–132V AC Line Output Bus (Vdc) Strap PTC Thermistor Bypass Converter Enable Bus OK 50ms 50ms Power Up Power Down 4. 1 1.1 2. 1 3. 1 5. 1 2.2 1.2 Figure 7—Functional block diagram: autoranging rectifier Figure 8—Timing diagram: power up/down sequence 1.1 2.1 3.1 4.1 5.1 1.2 2.2

Vicor Corp.Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 FARM, Filter/Autoranging Rectifier Module Rev. 4.7 Page 6 of 12 Set your site on VICOR at www.vicorpower.com PRELIMINARY Figure 9—Converter connections Application Note (continued) Off-Line Power Supply Configuration The FARM maintains the DC output bus voltage between 250 and 370Vdc over the entire input voltage range, which is compatible with Vicor 2nd Generation, 300V input converters as well as 1st Generation VI-26x and VI-J6x DC-DC converters. The FARM automatically switches to the proper bridge or doubler mode depending on the input voltage, eliminating the possibility of damage due to improper line connection. The FARM1xxx is rated at 500W in the low range (90-132Vac input), and 750W in the high range (180-264Vac input). The FARM2xxx is rated for 750W and 1000W 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 center junction of the series hold-up capacitors (C1, C2, see Fig. 9)for proper (autoranging) operation. Gas tubes V1 and V2 provide capacitor protection. The bleeder resistors (R1, R2, see Fig. 9) discharge the hold-up capacitors when power is switched off. Capacitors C7 and C8 are recommended if the holdup capacitors are located more than 3 inches from the FARM output pins. Enable (EN) Pin.(see Fig. 10)The Enable pin must be connected to the PC or Gate-In pin of all converter modules to disable the converters during power-up. Otherwise, the converters would attempt to start while the hold-up capacitorswere being charged through an unbypassed current limiting 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 150kΩresistor. A signal diode should be placed close to and in series with the PC or (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 varistors conduct. The thermistor bypass switch also opens if a fault or overload reduces the bus voltage to less than 180Vdc. +In PC (Gate In) PR (Gate Out) –In +In PC (Gate In) PR (Gate Out) –In Vicor DC-DC Converter Vicor DC-DC Converter To additional modules C7* C8* Part C1,2 C3–6 R1,2 V1,2 F1,2 D1,2 C7,8 D3,D4 C10,C11

Description

150kΩ, 0.5W 200V MOV 3A, PC Tron Diode Film Cap., 0.8µf MOV 0.47µF 1N5817 .001µF 500Ω Vicor Part Number see text 01000 00127-1503 20461-200 02178 00670 03040 26108 Sizing PCB traces: All traces shown in bold carry significant current and should be sized accordingly. FARM1-xxx N/ST/L +/– In 10A rms at 90Vac and 500W 4A DC at 190Vdc and 750W Required if C1 & C2 are located more than 3 inches from output of FARM. Holdup Box (HUB) 820µF HUB820-S 2200 µF HUB2200-S 1200µF HUB1200-S 2700 µF HUB2700-S 1800µF HUB1800-S 3300 µF HUB3300-S 20A rms at 90Vac and 750W 8A DC at 190Vdc and 1000W FARM2-xxx N/ST/L +/– In FARM Filter/Autoranging Rectifier Module N EMI GND N/C L B OK ST EN Z1 C9 L PE N C11 C10

Set your site on VICOR at www.vicorpower.com PRELIMINARY Vicor Corp.Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 FARM, Filter/Autoranging Rectifier Module Rev. 4.7 Page 7 of 12 Bus-OK (BOK) Pin. (see Fig. 11)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 FARM.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 transformation 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.(see Fig. 12)An integral input filter consists of a common mode choke and Y rated capacitors (line-ground) plus two X rated capacitors (line-line). This filter configuration provides common mode and differential mode insertion loss in the frequency range between 100kHz and 30MHz as illustrated in Figure 6. 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. 13). Many applicationsrequire 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(V1 2–V 2 2) / 2 (2) Where: P = operating power ∆t = discharge interval V 1 = capacitor voltage at the beginning of ∆t V 2 = 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) Application Note (continued) +In PC (Gate In) PR (Gate Out) –In N EMI GND N/C L B OK ST EN 150k 15Vdc Vicor DC-DC Converter Micro- controller Figure 10—Enable (EN) function +In PC (Gate In) PR (Gate Out) –In N EMI GND N/C L B OK ST EN Vicor DC-DC Converter Micro- controller

15 Vdc

27kΩ +5 Vdc Secondary referenced Optocoupler DI pkg. 26106 Optocoupler SM pkg. 26109 Figure 11—Bus OK (BOK) isolated power status indicator 4.7nF 4.7nF N EMI GND N/C L B OK ST EN .47µF .099µF 330µH Figure 12—Internal filter

Vicor Corp.Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 FARM, Filter/Autoranging Rectifier Module Rev. 4.7 Page 10 of 12 Set your site on VICOR at www.vicorpower.com PRELIMINARY PCB Mounting Specifications Mechanical Diagram Converter Pins No. Function Label

1 Neutral N

2 EMI GND

4 Line L

5 –Out –

6 Enable EN

8 BUS OK BOK

(2X) 0.01 0.35 8,8 0.12 3,1 DIA,(7X) 0.150 3,81 (REF) DIA,(2X) 0.080 2,03 431 76 5 0.23 5,8 0.400 10,16 1.400 35,56 1.000 25,40 0.700 17,78 2.20 55,9 1.74 44,2 1.900 48,26 0.300±0.015 7,62±0,38 0.300±0.015 7,62±0,38 FULL R (6X) (6X) (REF .) 0.10 2,5 2.000 50,80 1.30 33,0 2.28 57,9 2.20 55,9 0.130 3,30 0.10 2,5 0.49 12,4 0.65 16,5 0.06 1,5R( 3X) X 45˚ CHAMFER Use a 4-40 Screw (6X) Torque to: 5 in-lbs

0.57 N-m

0.54 13,7 0.42 10,6 Pin Style 2 &N (Long) 0.62 15,7 Pin Style 1&S (Short ) (9X) (9X) 0.50 ±0.02 12,7 ±0,5 Slotted (Style 1) or Threaded (Style 2) 4-40 UNC-2B (6X) or Thru Hole (Style 3) #30 Drill Thru (6X) (0.1285) 0.195 4,95 1.400* 35,56 1.000* 25,40 0.700* 17,78 0.400* 10,16 1.790 45,47 0.06 1,5R (4X) 0.158 4,01 56789 12 34 ±0.003 ±0,08 * DENOTES TOL = PCB THICKNESS 0.062 ±0.010 1,57 ±0,25 PIN STYLE 1&S 0.094 ±0.003 2,39 ±0,08 INBOARD SOLDER MOUNT 0.43 10,9 0.53 13,5 1.900* 48.26 1.900* 48,26 1.584* 40,23 0.164 ±0.003 4,16 ±0,08 PIN STYLE 2&N 0.094 ±0.003 2,39 ±0,08 ONBOARD SOLDER MOUNT 0.164 ±0.003 4,16 ±0,08 PLATED THRU HOLE DIA (7X) (2X) ALL MARKINGS THIS SURFACE PINS STYLES STYLE 1 & 2: TIN/LEAD HOT SOLDER DIPPED STYLE S & N: GOLD PLATED COPPER ALUMINUM BASEPLATE

Set your site on VICOR at www.vicorpower.com PRELIMINARY Vicor Corp.Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 FARM, Filter/Autoranging Rectifier Module Rev. 4.7 Page 11 of 12 Notes

Vicor Corp.Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 FARM, Filter/Autoranging Rectifier Module P/N 22952 Rev. 4.7 4/03/10M Set your site on VICOR at www.vicorpower.com V icor’s comprehensive line of power solutions includes modular, high density DC-DC converters and accessory components, configurable power supplies, and custom power systems. Information furnished by Vicor is believed to be accurate and reliable. However, no responsibility is assumed by Vicor for its use. No license is granted by implication or otherwise under any patent or patent rights of Vicor. Vicor components are not designed to be used in applications, such as life support systems, wherein a failure or malfunction could result in injury or death. All sales are subject to Vicor’s Terms and Conditions of Sale, which are available upon request. Specifications are subject to change without notice. Vicor Corporation

25 Frontage Road

Andover, MA, USA 01810 Tel: 800-735-6200 Fax: 978-475-6715 Email Vicor Express: vicorexp@vicr.com Technical Support: apps@vicr.com Component Solutions for Your Power System