VICOR FARM1CN2, FARM1CN1, FARM1C23, FARM1C21, FARM1C13 Datasheet

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PRELIMINARY

Vicor Corp. Tel: [phone] Fax: [phone] FARM, Filter/Autoranging Rectifier Module Rev. 4.7 Page 1 of 12

Parameter Rating Unit Notes

L to N voltage 264 Vac Continuous
L to N voltage 280 Vac 100ms
+Out to –Out voltage 400 Vdc
B OK to –Out voltage 16 Vdc
EN to –Out voltage 16 Vdc
Mounting torque 4-6(0.45-0.68) in-lbs (N-m) 6 each, 4-40 screw
Pin soldering temperature 500 (260) °F (°C) <5 sec; wave solder
Pin soldering temperature 750 (390) °F (°C) <7 sec; hand solder

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

45

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.

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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

EN61000-4-5

1kV–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

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PRELIMINARY

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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

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Operating Characteristics

Figure 1—Start-up at 120Vac input

Figure 3—Power down, from 120Vac Figure 4—Power down, from 240Vac

Figure 2—Start-up at 240Vac input

Vdc output

Strap
Engaged

Iac input @2A / mV

Iac input @2A / mV

Enable

Enable

B OK

Vdc output

B OK

Vdc output

Enable

B OK

Vdc output

Enable

B OK

Figure 5—Output overvoltage protection 240Vac range

Vdc output

➞

Enable

B OK

Figure 6—Typical Conducted Emissions