Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715

ENMods System: FARM3 and MiniHAM

Rev. 1.3

Page 2 of 12

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PRELIMINARY

Parameter

Min

Typ

Max

Unit

Notes

Operating input voltage

90

115

132

Vac

Autoranging (doubler mode)

Operating input voltage

180

230

264

Vac

Autoranging (bridge mode)

Input undervoltage

90

Vac

No damage

AC line frequency

47

63

Hz

C-,T-, H- and M-Grade

Power factor

0.68

0.72

Typical line

Inrush current

30

Amps

264Vac line voltage

Efficiency

94

96

%

Full load

AC Bus OK (BOK)

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 Figure12)

BOK true threshold

235

240

245

Vdc

Output Bus voltage

BOK 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 Figure 11)

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

FARM3 MODULE SPECIFICATIONS (see Figure 3 thru Figure 7 for operating characteristics)

MINIHAM MODULE SPECIFICATIONS (when used in accordance with Figure 1a)

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. Performance specifications

are based on the ENMods system as shown in Figure 1a.

Parameter

Min

Typ

Max

Unit

Notes

Output power

0

575

Watts

Efficiency @115Vac

93

94

%

Full load

Efficiency @ 230Vac

96

97

%

Full load

Output voltage

250

375

Vdc

External hold-up capacitance

3,300

µF

* Tracking error between BUS OK and Enable thresholds

ELECTROMAGNETIC COMPATIBILITY (configured as illustrated in Figures 1a and 1b)

Harmonic currents

EN61000-3-2, Amendment 14

50-625W, 230Vac input 575W output (see Figure 2)

Input line disturbances

EN61000-4-11

Input surge withstand

EN61000-4-5

2kV – 50 µs common mode

1kV – 50 µs differential mode

Conducted emissions

EN55022, Level B

(See Figures 8a thru 8c)