VI-ARMB-E2N3 - Vicor Corporation

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Data Sheet

VI-ARMTM

Autoranging Rectifier Modules

Up to 1500 Watts

Features

•RoHS Compliant (with F or G pin option)

•Autoranging input

•Microprocessor controlled

•VI-ARM-C1:

500 W @ 90 – 132 Vac

750 W @ 180 – 264 Vac

•VI-ARMB-C2:

750 W@ 115 Vac

1500 W @ 230 Vac

•96 – 98% efficiency

•100˚C baseplate (no derating)

•cULus, cTÜVus, CE Marked

•AC Bus OK, module enable

•Inrush limiting (no external circuitry)

•CE Marked

Typical Applications: systems requiring a

rugged, full featured interface to the AC

mains in the smallest possible package.

Product Highlights

The ARM (Autoranging Rectifier Module) is

an AC front end module which provides

autoranging line rectification and inrush

current limiting. The ARM is available in

either 500/750 W or 750/1500 W models in a

quarter brick package measuring only

2.28" x 1.45" x 0.5".

The ARM interfaces directly with worldwide

AC mains and may be used with Vicor

300 V input DC-DC converters to realize an

autoranging, high density, low profile

switching power supply. The ARM 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 Micro series packaging technology

offers flexible mounting options for various

manufacturing processes. The ARM 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.

Actual size:

2.28 x 1.45 x 0.5 in

57,9 x 36,8 x 12,7 mm

Parameter Rating Unit Notes

L to N 264 Vac

280 Vac 100 ms

+Out to –Out 400 Vdc

B OK to –Out16Vdc

EN to –Out 16 Vdc

Output power

VI-ARM 500/750 Watts 115/230 V

VI-ARMB 750/1500 Watts 115/230 V

See page 3 for derating

Mounting torque 4 – 6 (0.45 – 0.68) in-lbs (N-m) 6 each, 4-40 screw

Operating temperature –40 to +100 °C H-Grade

Storage temperature –55 to +125 °C H-Grade

Pin soldering temperature 500 (260) °F (°C) <5 sec; wave solder

750 (390) °F (°C) <7 sec; hand solder

Product

Pin Style**

1= Short

2= Long

S= Short Modumate

N= Long Modumate

F= Short RoHS

G= Long RoHS

Product Grade Temperatures (°C)

Grade Operating Storage

E= –10 to +100 –40 to +125

C= –20 to +100 –40 to +125

T= –40 to +100 –40 to +125

H= –40 to +100 –55 to +125

Absolute Maximum Ratings

Part Numbering

**Pin styles S, N, F & G are compatible with the ModuMate interconnect system for socketing and surface mounting.

Parameter Min Typ Max Unit

Baseplate to sink

flat, greased surface 0.24 °C/Watt

with thermal pad (P/N 16495) 0.3 °C/Watt

Baseplate to ambient

free convection 15 °C/Watt

1000 LFM 2.7 °C/Watt

Thermal capacity 48 Watt-sec/°C

Thermal Resistance Capacity

Baseplate

Blank = Slotted

2 = Threaded

3 = Through hole

VI-ARMB - C 2 1

VI- ARM - C 1 2 3

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VI-ARM - 1 VI-ARMB - 2

Parameter Min Typ Max Min Typ Max Unit Notes

Output power 0 500 0 750 Watts 105 – 132 Vac (Fig. 1)

0 750 0 1500 Watts 210 – 264 Vac (Fig. 2)

Efficiency

120 Vac9496 9496 %

240 Vac96 98 96 98 %

Output voltage 200 375 200 375 Vdc 90 – 264 Vac

VI-ARM - 1 VI-ARMB - 2

Parameter Min Typ Max Min Typ Max Unit Notes

Operating input voltage 90 132 90 132 VacAutoranging (doubler mode)

180 264 180 264 VacAutoranging (bridge mode)

Input undervoltage 90 90 Vac No damage

Input surge withstand 280 280 Vac 100 ms

AC line frequency 47 63 47 63 Hz C, E-Grade

47 880 47 880 Hz T & H-Grade

Input current, rms 0 7.4 0 11.1 Amps 120 Vac

0 5.4 0 7.2 Amps 240 Vac

Power factor 0.60 0.60 Dependent on line source

impedence, holdup

capacitance, and load

Inrush current 30 30 Amps 264 Vac peak line,

cold start

Holdup Capacitance 1600 2400 F

OUTPUT SPECIFICATIONS

INPUT SPECIFICATIONS

ELECTRICAL CHARACTERISTICS

Electrical characteristics apply over the full operating range of input voltage, output load (resistive) 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)

On-state resistance (low) 15 ΩTo negative output - bus normal

On-state current (low) -50 mA Bus normal

Off-state voltage 14.8 15.0 15.2 Vdc Bus abnormal, 27 K internal pull up to 15 Vdc (Fig. 12)

On-state threshold 235 240 245 Vdc Output bus voltage

Off-state threshold 200 205 210 Vdc Output bus voltage

Module Enable (EN)

On-state resistance (low) 15 ΩTo negative output - converters are disabled

On-state current (low) 50 mA

Off-state voltage 14.8 15.0 15.2 Vdc 150 K internal pull up to 15 Vdc (Fig. 11)

On-state threshold 235 240 245 Vdc Output bus voltage

Off-state threshold 185 190 195 Vdc Output bus voltage

Over voltage shutdown 380 390 400 Vdc

AC Bus OK - module enable, 15 17 20 Vdc AC Bus OK and module enable thresholds track

differential error*

Tracking error between BUS OK and Enable thresholds

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ELECTRICAL CHARACTERISTICS (CONT.)

GENERAL SPECIFICATIONS

Parameter Min Typ Max Unit Notes

MTBF >1,000,000 hours 25˚C, ground benign

Baseplate material Aluminum

Cover Kapton insulated aluminum, plastic molded terminal blocks

Pin materialCopper, tin/lead solder dipped (solder pins)

Gold plated nickel copper (Modumate and RoHS)

Weight 1.6 (45) ounces (grams)

Size 2.28 x 1.45 x 0.5 inches

(57,9 x 36,8 x 12,7) (mm)

SAFETY SPECIFICATIONS

Parameter Min Typ Max Unit Notes

Isolation voltage (in to out) None Isolation provided by DC-DC converter(s)

Dielectric withstand 1,500

VRMS

(I/O to baseplate)

Leakage current 100 A No filter

630

640

650

660

670

680

690

700

710

720

730

740

750

760

90 95 100 105 110 115 120 125 130

Input Voltage (AC)

Output Power (Watts)

Figure 1 — 90 – 130 Vac ARMB output power rating

1260

1280

1300

1320

1340

1360

1380

1400

1420

1440

1460

1480

1500

1520

180 190 200 210 220 230 240 250 260

Input Voltage (AC)

Output Power (Watts)

Figure 2 — 180 – 260 Vac ARMB output power rating

VI-ARMB DERATING

AGENCY APPROVALS

Safety Standards Agency Markings Notes

ARM1 xxx

UL60950, EN60950, CSA 60950 cTÜVusBaseplate earthed, fast acting line fuse,

Bussman ABC10

CE Marked Low voltage directive

ARM2 xxx

UL60950, EN60950, CSA 60950 cTÜVusBaseplate earthed, fast acting line fuse,

Bussman ABC15

CE Marked Low voltage directive

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OPERATING CHARACTERISTICS

Figure 3 — Start-up at 120 Vac input

Figure 5 — Power down, from 120 Vac Figure 6 — Power down, from 240 Vac

Figure 4 — Start-up at 240 Vac input

Vdc output

Strap

Engaged

Iac input @2A / mV Iac input @2A / mV

Enable Enable

B OK

Vdc output

Enable

B OK

Vdc output

Enable

B OK

Vdc output

Enable

B OK

Figure 7 — Output overvoltage protection 240 Vac range

Vdc output

Enable

B OK



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The VI-ARM Autoranging Rectifier Module (ARM) provides

an effective solution for the AC front end of a power supply

designed with Vicor DC-DC converters. This high performance

power system building block satisfies a broad spectrum of

requirements and agency standards.

The ARM contains all of the power switching and control

circuitry necessary for autoranging rectification, inrush current

limiting, and overvoltage protection. This module also provides

converter enable and status functions for orderly power

up/down control or sequencing. To complete the AC front-end

configuration, the user needs only to add holdup capacitors and

a suitable input filter with transient protection.

Functional Description

Initial Conditions. 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. 8). In addition, the

downstream DC-DC modules are disabled via the Enable (EN)

line, and Bus-OK (B OK) is high.

Power-Up Sequence. (See Fig. 9).:

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

holdup capacitor value and the thermistor cold resistance.

The slope (dv/dt) of the capacitor voltage approaches zero

as the capacitors become charged to the peak of the AC

line voltage.

If the bus voltage is less than 200 V 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 200 V, the doubler is

not activated.

If the bus voltage is greater than 235 V as the slope

approaches zero, the inrush limiting thermistor is

bypassed. Below 235 V, the thermistor is not bypassed.

The converters are enabled ~150 milliseconds after the

thermistor bypass switch is closed.

Bus-OK is asserted after an additional ~150 millisecond

delay to allow the converter outputs to settle within

specification.

Power-Down Sequence. (See Fig. 9). 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

205 Vdc (Typ.).

The converters are disabled when the bus voltage falls

below 200 Vdc. 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.

APPLICATION NOTE

Microcontroller

PTC

Thermistor

+OUT

–OUT

Strap

BOK

Strap

400

300

200

100

90–132 V

AC Line

Output

Bus

(Vdc)

Strap

PTC

Thermistor

Bypass

Converter

Enable

Bus OK

~150 ms

Power

Down

4.1

1.1

2.1

3.1

5.1

2.2

1.2

~150 ms

Figure 8 — Functional block diagram Figure 9 — Timing diagram: power up/down sequence

1.1

2.1

3.1

4.1

5.1

1.2

2.2

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Figure 10 — Converter connections

+IN

PC (GATE IN)

–IN

+IN

PC (GATE IN)

–IN

BOK

–V

Vicor DC-DC

Converter

VI-ARM

Vicor DC-DC

Converter

To additional modules

C7*

C8*

Z1 Filter

C10

C11

Not used with VI-260/VI-J60

Part Description Vicor Part Number

C1,2 Holdup capacitors

C3–6 4700pF (Y2 type) 01000

R1,2 150 k, 0.5 W 00127-1503

V1,2 220 V MOV 30234-220

F1,2 Use reccommended fusing for

specific DC-DC Converters

D1,2 Diode 00670

C7,8* Film Cap., 0.61 µF 34610

Z1 MOV (270 V) 30076

D3,D4 1N5817 26108

C10,C11 0.001 µF

R3, R4** 250 Ω

F3 ABC-10 A VI-ARM-_1

ABC-10 A VI-ARMB-_2

Sizing PCB traces:

All traces shown in bold carry significant

current and should be sized accordingly.

*Required if C1 & C2 are located more than

6 inches (15 cm) from output of VI-ARM.

**Not used with VI-260/VI-J60

APPLICATION NOTE (CONT.)

Off-Line Power Supply Configuration

The ARM maintains the DC output bus voltage between 200

and 375 Vdc over the entire universal input range, this being

compatible with Vicor VI-260 series and VI-J60 series DC-DC

converters, as well as Vicors Maxi, Mini, Micro 300 V input

Vicor converters. The ARM automatically switches to the

proper rectification mode (doubled or undoubled) depending

on the input voltage, eliminating the possibility of damage due

to improper line connection. The VI-ARM-x1 is rated at 500 W

in the low range (90-132 Vac input), and 750 W in the high

range (180 – 264 Vac input). The VI-ARMB-x2 is rated for 750

W and 1500 W 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. See VI-ARMB

derating curves. (Figures 1, and 2)

Strap (ST) Pin. In addition to input and output power pin

connections, it is necessary to connect the Strap pin to the

junction of the series holdup capacitors (C1, C2, Fig. 10)

for proper (autoranging) operation. Varistors across the

capacitors provide input transient protection. The bleeder

resistors (R1, R2, Fig. 10) discharge the holdup capacitors

when power is switched off.

Enable (EN) Pin. (See Fig. 11). The Enable pin must be

connected to the Gate-In or PC pin of all converter modules to

disable the converters during power-up. Otherwise, the

converters would attempt to start while the holdup capacitors

were being charged through an un-bypassed 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

15 V through a 150 kΩ resistor.

A signal diode should be placed close to and in series with the

PC/Gate-In pin of each converter to eliminate the possibility of

control interference between converters. The Enable pin

switches to the high state (15 V) 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 400 Vdc. 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 180 Vdc.

CAUTION: There is no input to output isolation in the

ARM, hence the –Out of the ARM and thus the –In of the

downstream DC-DC converter(s) are at a high potential. If

it is necessary to provide an external enable / disable

function by controlling the DC-DC converter’s PC pin

(referenced to the –In) of the converter an opto-isolator or

isolated relay should be employed.

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APPLICATION NOTE (CONT.)

+IN

PC (GATE IN)

–IN

BOK

–V

Micro-

controller

15 Vdc

To additional modules

Not used with VI-260/VI-J60

Figure 11 — Enable (EN) function; See Fig.8 for details

+IN

–IN

BOK

–V

Micro-

controller

15 Vdc

+5 Vdc

Secondary

referenced

To additional modules

Figure 12 — Bus OK (B OK) isolated power status indicator

L2/N

GND

Part Description Vicor Part Number

C1 1.0 µF 02573

C2, C3 4700pF (Y2 type) 03285

C4 0.15µF 03269

F1 10 A Max 05147

L1, L2 27 µH 32012

L3 1.3 mH 32006

R1, R2 10 Ω

R3 150 kΩ, 0.5 W

R4 2.2 Ω

Z1 MOV 30076

Figure 13 — Filter connections

Bus-OK (B OK) Pin. (See Fig. 12). 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 module.

Filter. Two input filter recommendations are shown for low

power VI-ARM-x1 and high power VI-ARMB-x2 (See Fig. 13).

Both filter configurations provide sufficient common mode and

differential mode insertion loss in the frequency range between

100 kHz and 30 MHz 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. 14). 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= PΔt = C(V12–V22) / 2 (2)

Where: P = operating power

Δt = discharge interval

V1= capacitor voltage at the beginning of Δt

V2= capacitor voltage at the end of Δt

Rearranging equation 2 to solve for the required capacitance:

C = 2PΔt / (V12–V22)(3)

L2/N

GND

Part Description Vicor Part Number

L1,L4 1,000 µH 12 A / 6.5 MΩ 31743

L2, L3 22 µH 33206

C1 0.68 µF (X type) 02573

C2,C3,C4,C5 4700pF (Y2 type) 03285

C6 0.22 µF (X type) 04068

R1 390 kΩ 1/2 W

R2 10 Ω 1/2 W

F1 15 A Max

Z1 MOV 30076

High power filter

connections

Low power filter

connections

Vicor

DC-DC

Converter

Vicor

DC-DC

Converter

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APPLICATION NOTE (CONT.)

Operating Power (W)

Power Fail Warning Time (ms)

150012501000750500250

2,200 μF1,600 μF1,300 μF

1,100 μF820 μF680 μF(VI-ARM-x1)

(VI-ARMB-x2)

Figure 15 — Power fail warning time vs. operating power and

total bus capacitance, series combination of C1, C2 (Fig. 10)

Operating Power (W)

Ride –Through Time (ms)

100

90 Vac 115 Vac

150012501000750500250

Total

capacitance

820 μF

Figure 16 — Ride-through time vs. operating power

Figure 14 — Hold-up time

205 V

190 V

Power Fail

Warning

Bus OK Converter

Shut down

Hold-up Time

254 V

Ride-Through Time

Ripple (V p-p) π – θθ

The power fail warning time (Δt) is defined as the interval

between (B OK) and converter shutdown (EN) as illustrated in

Fig. 12. The Bus-OK and Enable thresholds are 205 V and

190 V, respectively. A simplified relationship between power

fail warning time, operating power, and bus capacitance is

obtained by inserting these constants:

C = 2PΔt / (2052– 1902)

C = 2PΔt / (5,925)

It should be noted that the series combination (C1, C2, Fig. 10)

requires each capacitor to be twice the calculated value,

but the required voltage rating is reduced to 200 V.

Allowable ripple voltage on the bus (or ripple current in the

capacitors) may define the capacitance requirement.

Consideration should be given to converter ripple rejection and

resulting output ripple voltage.

For example, a converter whose output is 15 V and nominal

input is 300 V will provide 56 dB ripple rejection, i.e., 10 V p-p

of input ripple will produce 15 mV p-p of output ripple. (See

Fig. 18) Equation 3 is again used to determine the required

capacitance. In this case, V1and V2are the instantaneous

values of bus voltage at the peaks and valleys (see Fig. 14) of

the ripple, respectively. The capacitors must hold up the bus

voltage for the time interval (Δt) between peaks of the rectified

line as given by:

Δt = (π– θ) / 2πf(4)

Where: f = line frequency

θ= rectifier conduction angle

The approximate conduction angle is given by:

θ= Cos-1V2/V1(5)

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Operating Power (W)

P-P Ripple Voltage (Vac)

150012501000750500250

2,200 μF1,600 μF1,300 μF

1,100 μF820 μF680 μF(VI-ARM-x1)

(VI-ARMB-x2)

Figure 17 — Ripple voltage vs. operating power and bus

capacitance, series combination of C1, C2 (see Fig. 10)

APPLICATION NOTE (CONT.)

Output Voltage

Ripple Rejection (dB)

50301552

Figure 18 — Converter ripple rejection vs. output voltage (typical)

Example

In this example, the output required at the point of load is 12

Vdc at 320 W. Therefore, the output power from the ARM

would be 375 W (assuming a converter efficiency of 85%). The

desired hold-up time is 9 ms over an input range of 90 to 264 Vac.

Determining Required Capacitance for Power Fail

Warning. Fig. 15 is used to determine hold-up capacitance

for a given power fail warning time and power level, and

shows that the total bus capacitance must be at least 820 µF.

Since two capacitors are used in series, each capacitor must

be at least 1,640 µF.

Note: The warning time is not dependent on line voltage. A

hold-up capacitor calculator is available on the Vicor website,

at vicorpower.com/hubcalc.

Determining Ride-through Time. Figure 16 illustrates ride-

through time as a function of line voltage and output power,

and shows that at a nominal line of 115 Vac, ride-through

would be 68 ms. Ride-through time is a function of line

voltage.

Determining Ripple Voltage on the Hold-up Capacitors.

Fig. 17 is used to determine ripple voltage as a function of

operating power and bus capacitance, and shows that the

ripple voltage across the hold-up capacitors will be 12 Vac.

Determining the Ripple on the Output of the

DC-DC Converter. Fig. 18 is used to determine the ripple

rejection of the DC-DC converter and indicates a ripple

rejection of approximately 60 dB for a 12 Volt output. If the

ripple on the bus voltage is 12 Vac and the ripple rejection of

the converter is 60 dB, the output ripple of the converter due

to ripple on its input (primarily 120 Hz) will be 12 mV p-p.

Note that Maxi, Mini, Micro converters have greater ripple

rejection then either VI-200s or VI-J00s.

For more information about designing an autoranging AC

input power supply using the ARM and Vicor DC-DC

converter modules, contact Vicor Applications Engineering at

the nearest Vicor Technical Support Center (see back cover),

or send an E-mail to apps@vicorpower.com.

• • •

Another consideration in hold-up capacitor selection is their

ripple current rating. The capacitors’ rating must be higher

than the maximum operating ripple current. The approximate

operating ripple current (rms) is given by:

I rms = 2P/Vac (6)

Where: P = operating power level

Vac = operating line voltage

Calculated values of bus capacitance for various hold-up time,

ride-through time, and ripple voltage requirements are given

as a function of operating power level in Figures 15, 16, and

17, respectively.

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PLATED

THRU HOLE

DIA

±0,08

*DENOTES TOL =

0.133

3,38

1.734**

44,04

.400*

10,16

1.090**

27,69

0.145*

3,68

0.800*

20,32

0.525*

13,34

0.275*

6,99

2.000*

50,80

0.06

1,5

R(4X)

INBOARD

SOLDER

MOUNT

SHORT PIN STYLE

0.094 ±0.003

2,39 ±0,08

0.43

10,9

(7X)

**PCB WINDOW

PCB THICKNESS 0.062 ±0.010

1,57 ±0,25

0.53

13,5

ONBOARD

SOLDER

MOUNT

LONG PIN STYLE

0.094 ±0.003

2,39 ±0,08

±0.003

Converter Pins

No. Function Label

1–Out–V

2Enable EN

3Bus OK B OK

4+Out+V

5NeutralN

6StrapST

7 Line L

MECHANICAL DRAWINGS

PCB Mounting Specifications

PINS STYLES

SOLDER:TIN/LEAD PLATED

MODUMATE: GOLD PLATED COPPER

RoHS: GOLD PLATED COPPER

ALUMINUM

BASEPLATE

ALL MARKINGS

THIS SURFACE

Module Outline

Unless otherwise specified,

dimensions are in inches

Decimals Tol. Angles

0.XX ±0.01

±0,25 ±1°

0.XXX ±0.005

±0,127

(ALL MARKINGS THIS SURFACE)

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Vicor Corporation

25 Frontage Road

Andover, MA, USA 01810

Tel: 800-735-6200

Fax: 978-475-6715

Customer Service: custserv@vicorpower.com

Technical Support: apps@vicorpower.com

Vicor’s comprehensive line of power solutions includes high density AC-DC

and DC-DC modules and accessory components, fully configurable AC-DC

and DC-DC power supplies, and complete custom power systems.

Information furnished by Vicor is believed to be accurate and reliable. However, no responsibility is assumed by Vicor for its

use. 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.

Intellectual Property Notice

Vicor and its subsidiaries own Intellectual Property (including issued U.S. and Foreign Patents and pending patent

applications) relating to the products described in this data sheet. Interested parties should contact Vicor's Intellectual

Property Department.

Warranty

Vicor products are guaranteed for two years from date of shipment against defects in material or workmanship when in normal

use and service. This warranty does not extend to products subjected to misuse, accident, or improper application or

maintenance. Vicor shall not be liable for collateral or consequential damage. This warranty is extended to the original

purchaser only.

EXCEPT FOR THE FOREGOING EXPRESS WARRANTY, VICOR MAKES NO WARRANTY, EXPRESS OR IMPLIED,

INCLUDING, BUT NOT LIMITED TO, THE WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR

PURPOSE.

Vicor will repair or replace defective products in accordance with its own best judgement. For service under this warranty, the

buyer must contact Vicor to obtain a Return Material Authorization (RMA) number and shipping instructions. Products

returned without prior authorization will be returned to the buyer. The buyer will pay all charges incurred in returning the

product to the factory. Vicor will pay all reshipment charges if the product was defective within the terms of this warranty.

Information published by Vicor has been carefully checked and is believed to be accurate; however, no responsibility is

assumed for inaccuracies. Vicor reserves the right to make changes to any products without further notice to improve reliability,

function, or design. Vicor does not assume any liability arising out of the application or use of any product or circuit; neither

does it convey any license under its patent rights nor the rights of others. Vicor general policy does not recommend the use of

its components in life support applications wherein a failure or malfunction may directly threaten life or injury. Per Vicor Terms

and Conditions of Sale, the user of Vicor components in life support applications assumes all risks of such use and indemnifies

Vicor against all damages.