Rev 6.7

vicorpower.com

Page 2 of 11

06/2015

800 927.9474

FARMxxxx

FARM1xxx

FARM2xxx

Parameter

Min

Typ

Max

Min

Typ

Max

Unit

Notes

Output power

0

500

0

750

Watts

90 – 132 Vac

0

750

0

1000

Watts

180 – 264 Vac

Efficiency

94

96

94

96

%

120/240 Vac

Output voltage

250

370

250

370

Vdc

90 – 264 Vac

External hold-up capacitance

1,750

µF

2 - 3,300 µF in series; HUB3300-S

1,100

µF

2 - 2,200 µF in series; HUB2200-S

OUTPUT SPECIFICATIONS

Parameter

Min

Typ

Max

Unit

Notes

Operating input voltage

low range

90

132

Vac

Autoranging (doubler mode)

high range

180

264

Vac

Autoranging (bridge mode)

Input undervoltage

90

Vac

No damage

AC line frequency

47

63

Hz

C-Grade

47

880

Hz

T-Grade, H-Grade

Power factor

0.60

Dependent on line source impedance, hold up

capacitance and load.

Inrush current

30

Amps

264 Vac peak line

INPUT SPECIFICATIONS (FARM1xxx, FARM2xxx)

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.

CONTROL PIN SPECIFICATIONS

Parameter

Min

Typ

Max

Unit

Notes

AC Bus OK (B OK)

Low state resistance

15

Ω

To negative output – Bus normal

Low state voltage

0.1

Vdc

Bus normal 50 mA max.

High state voltage

14.0

15.0

15.4

Vdc

Bus abnormal, 27 K internal pull up to 15 Vdc (see Fig.11)

B OK true threshold

235

240

245

Vdc

Output Bus voltage (see Fig. 8)

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 voltage

0.1

Vdc

50 mA max.

High state voltage

12

14

16

Vdc

150 K internal pull up to 15 Vdc (see Fig. 10)

Enable threshold

235

240

245

Vdc

Output bus voltage (see Fig. 8)

Disable threshold

185

190

195

Vdc

Output bus voltage

AC Bus OK - Module Enable,

12

14

16

Vdc

AC Bus OK and Module Enable thresholds track

differential error*

* Tracking error between BUS OK and Enable thresholds