VI-882454 - Vicor Corporation

Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 24Vin/3.3Vout/132W DC-DC Converter Rev. 5.2 Page 1 of 9

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Parameter Rating Unit Notes

+In to –In voltage -0.5 to +36.0 Vdc

+In to –In voltage 55 Vdc <100ms

PC to –In voltage -0.5 to +7.0 Vdc

PR to –In voltage -0.5 to +7.0 Vdc

+Out to –Out voltage -0.5 to +4.79 Vdc

+Sense to –Out voltage -0.5 to +4.79 Vdc

–Sense to –Out voltage 1.0 Vdc

SC to –Out voltage -0.5 to +1.5 Vdc

Isolation voltage (in to out) 3000 Vrms

Isolation voltage (in to base) 1550 Vrms

Isolation voltage (out to base) 500 Vrms

Storage temperature See Page 8 °C 125 Max

Operating temperature See Page 8 °C Baseplate

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

Pin soldering temperature 750 (390) °F (°C) <7 sec;hand solder

Mounting torque 5 (0.57) in-lbs (N-m) 6 each, # 4-40 or M3

Shown actual size:

2.28 x 2.2 x 0.5 in

57,9 x 55,9 x 12,7 mm

(Product shown is for size only.

Pin and baseplate style may vary.

Pin style 1 and slotted baseplate are shown.)

Absolute Maximum Ratings

Parameter Min Typ Max Unit

Baseplate to sink; flat, greased surface 0.16 °C/Watt

Baseplate to sink; 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

Thermal capacity 83 Watt-sec/°C

Thermal Resistance and Capacity

2 4 Vin / 3.3Vout / 132Watts

DC-DC Converter Module

See Page 8 for Part Numbering and Options

Features

•DC input range: 18 - 36V

•Input surge withstand: 55V for 100ms

•DC output: 3.3V

•Programmable output: 10 to 110%

•Regulation: ±0.2% no load to full load

•Efficiency: 79.3%

•Maximum operating temperature:

100°C at full load

•Power density: 53W/cubic inch

•Height above board: 0.43 in. (10,9 mm)

•Parallelable, with N+M fault tolerance

•Low noise ZCS/ZVS architecture

•Pin style:See Page 6

• Baseplate:See Page 7

Product Overview

This DC-DC converter module uses

2nd Generation power processing, control

and packaging technologies to provide the

performance, flexibility and cost effectiveness

expected of a mature power component.

For example, a plated-cavity core transformer

couples widely separated primary and

secondary windings, resulting in low in-to-

out parasitic capacitance and noise.

High frequency ZCS/ZVS switching,

advanced power semiconductor packaging

and thermal management provide high

power density with low temperature

gradients. Extensive use of silicon

integration results in 1/3 the part count

of a 1st Generation converter.

This converter is manufactured in a

state-of-the-art automated manufacturing

facility on a short-cycle-time robotic line

having a capacity of one module every ten

seconds. In-line process controls are

designed to achieve low defect rates and

consistent quality. A comprehensive CIM

system controls the dispatching, assembly

and testing of each module, enabling small

lots to be manufactured as efficiently as

hundreds-of-thousands of units.

Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 24Vin/3.3Vout/132W DC-DC Converter Rev. 5.2 Page 2 of 9

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Parameter Min Typ Max Unit Notes

Operating input voltage 18 24 36 Vdc

Input surge withstand 55 Vdc <100ms

Output voltage setpoint 3.267 3.300 3.333 Vdc Nominal input; full load; 25°C

Output OVP setpoint 4.24 4.40 4.56 Vdc 25°C;recycle input voltage to restart ( 1 minute off )

Output power 132 Watts At 100°C baseplate temperature

Efficiency 75.0 79.3 % Nominal input; 75% of full load;25°C

Parameter Min Typ Max Unit Notes

Line regulation ±0.02 ±0.20 % Low line to high line; full load

Load regulation ±0.06 ±0.20 % No load to full load; nominal input

Temperature regulation ±0.002 ±0.005 % / °C -20 to 100°C

Ripple and noise, p-p 92 184 mV Nominal input; full load; 20 MHz bandwidth

Current limit 40.8 46.0 54.0 Amps Output voltage 95% of nominal

Short circuit current 28 46 54 Amps Output voltage <250mV

Power sharing accuracy ±2 ±5 % 10 to 100% of full load

Programming range 10 110 % Of nominal output voltage .F or trimming below 90%

of nominal, a minimum load of 10% of maximum

rated power may be required.

Parameter Min Typ Max Unit Notes

Undervoltage turn-on 17.5 17.9 Vdc

Undervoltage turn-off 14.77 15.30 Vdc

Overvoltage turn-off/on 36.3 37.8 39.6 Vdc

Dissipation, standby 4.3 6.2 Watts No load

MODULE OPERATING SPECIFICATIONS

MODULE INPUT SPECIFICATIONS

MODULE OUTPUT 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.

Note: For important information relative to applications where the converter modules are subject to continuous dynamic loading,

contact Vicor applications engineering at 800-927-9474.

Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 24Vin/3.3Vout/132W DC-DC Converter Rev. 5.2 Page 3 of 9

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Parameter Min Typ Max Unit Notes

PRIMARY SIDE (PC = Primary Control; PR = Parallel)

PC bias voltage 5.50 5.75 6.00 Vdc PC current = 1.0 mA

current limit 1.5 2.1 3.0 mA PC voltage = 5.5V

PC module disable 2.3 2.6 2.9 Vdc Must be able to sink ≥4 mA. See Fig. 1

PC module enable delay 4 7 ms

PC module alarm 0.5 Vavg UV, OV, OT, module fault. See Figs.2 and 4

PR emitter amplitude 5.7 5.9 6.1 Volts PR load >30 ohms, < 30 pF

PR emitter current 150 mA

PR receiver impedance 375 500 625 ohms 25°C

PR receiver threshold 2.4 2.5 2.6 Volts Minimum pulse width: 20ns

PR drive capability 12 modules Without PR buffer amplifier

SECONDARY SIDE (SC = Secondary Control)

SC bandgap voltage 1.21 1.23 1.25 Vdc Referenced to –Sense

SC resistance 990 1000 1010 ohms

SC capacitance 0.033 µF

SC module alarm 0 Vdc With open trim; ref erenced to –Sense.See Fig.6

Parameter Min Typ Max Unit Notes

Remote sense (total drop) 0.5 Vdc 0.25V per leg (senses must be closed)

Isolation voltage (in to out) 3000 Vrms Complies with reinforced insulation requirements

Isolation voltage (in to base) 1550 Vrms Complies with basic insulation requirements

Isolation voltage (out to base) 500 Vrms Complies with operational insulation requirements

Isolation resistance (in to out) 10 megohms

Weight 3.7 (104) 4 (112) ounces (grams)

Temperature limiting 100 115 °C See Figs.2 and 4

Agency approvals available UL, CSA, TÜV, BABT, CE, VDE UL1950, CSA950, EN60950, VDE0805, BS7002,

IEC60950.With a fuse in series with the +Input

MODULE CONTROL SPECIFICATIONS

MODULE GENERAL SPECIFICATIONS

ELECTRICAL CHARACTERISTICS, continued

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CONTROL FUNCTIONS - PC PIN

Module Enable/Disable

The module may be disabled by pulling PC below 2.3V with

respect to the –Input. This may be done with an open collector

transistor, relay, or optocoupler. Multiple converters may be

disabled with a single transistor or relay either directly or via

“OR’ing” diodes. See Figure 1.

Module Alarm

The module contains “watchdog” circuitry which monitors

input voltage, operating temperature and internal operating

parameters. In the event that any of these parameters are

outside of their allowable operating range, the module will shut

down and PC will go low. PC will periodically go high and the

module will check to see if the fault (as an example,

overtemperature) has cleared. If the fault has not been cleared,

PC will go low again and the cycle will restart. The SC pin will

go low in the event of a fault and return to its normal state after

the fault has been cleared. See Figures 2 and 4.

Disable

Disable = PC <2.3V

+Out

–S

–Out

+In

–In

Figure 1—Module enable/disable.

Figure 3—LED on-state indicator.

4kΩ

"Module

Enabled"

+Out

–S

–Out

+In

–In

Optocoupler +Out

–S

–Out

+In

–In

4kW

Alarm

1.00V

+Out

–S

–Out

+In

–In

+Out

–S

–Out

+In

–In

Input Undervoltage

2-20ms typ.

f (VIN)

Auto

Restart

5.7Vdc

(0-3mA)

50Ω

SW2 SW3

1.23

Vdc 6K

SW1

SW1, 2, & 3

shown in

"Fault" position

Input Overvoltage

Overtemperature

Module Faults

Figure 2—PC/SC module alarm logic.

Figure 5—Isolated on-state indicator.

2-20ms typ.

Fault

1.23V

5.7V 40µs typ.

Figure 4—PC/SC module alarm timing.

Figure 6—Secondary side on-state indicator.

Primary Auxiliary Supply

At 5.7V, PC can source up to 1.5mA. In the example shown in

Figure 3, PC powers a module enabled LED.

Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 24Vin/3.3Vout/132W DC-DC Converter Rev. 5.2 Page 5 of 9

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Output Voltage Programming

The output voltage of the converter can be adjusted or

programmed via fixed resistors, potentiometers or voltage

DACs. See Figures 7 and 8.

CONTROL FUNCTIONS - SC PIN

Figure 8—Output voltage trim up circuit.Figure 7—Output voltage trim down circuit.

RD (ohms) = 1,000 V out

Vnom - Vout

Trim Up Load

+Out

–S

–Out

Error

Amp

1kΩ

1.23V

0.033

µF

Trim Down Load

+Out

–S

–Out

Error

Amp

1kΩ

1.23V

0.033

µF

Trim Down

1. This converter is not a constant power device – it has a

constant current limit. Hence, available output power is

reduced by the same percentage that output voltage is

trimmed down. Do not exceed maximum rated output current.

2. The trim down resistor must be connected to the –Sense pin.

Trim Up

1. The converter is rated for a maximum delivered power . To ensure

t hat maximum rated power is not exceeded, reduce maximum

output current by the same percentage increase in output voltage.

2. The trim up resistor must be connected to the +Sense pin.

3. Do not trim the converter above maximum trim range

(typically +10%) or the output over voltage

protection circuitry may be periodically activated.

RU (ohms) = 1,000 (Vout-1.23) Vnom –1,000

1.23 (Vout-Vnom)

Trim resistor values calculated automatically:

On-line calculators for trim resistor values are available

on the vicor website at: vicorpower.com/tools.html.

Resistor values can be calculated for fixed trim up, fixed

trim down and for variable trim up or down cases for both

1st and 2nd Generation DC-DC converters.

In addition to trimming information, the web site and the

Applications Manual also include design tips, applications

circuits, EMC suggestions, thermal design guidelines and

PDF data sheets for all available Vicor products.

Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 24Vin/3.3Vout/132W DC-DC Converter Rev. 5.2 Page 6 of 9

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+Sense from

other modules

in the array

+In

–In

+Out

–Out

–S

Figure 12—OR’ing diodes connections.

+Out

–S

–Out

+Out

–S

–Out

+Out

–S

–Out

Load

–S

Module

+In

–In

+In

–In

Module

N+1

+In

–In

Figure 11—N+1 module array output connections.

Figure 9—DC coupled single-wire interface.

Module 2

(up to 12)

Module

Ground plane

+Out

–S

–Out

+In

–In

+Out

–S

–Out

+In

–In

Module 2

(up to 12)

Module

Ground plane

+Out

–S

–Out

+In

–In

+Out

–S

–Out

+In

–In

Figure 10—AC coupled single-wire interface.

0.001µF

•The +Out and –Out power buses

should be designed to minimize

and balance parasitic impedance

from each module output to the

load.

•The +Sense pins should be tied

to the same point on the +Out

power bus; the –Sense pins

should be tied to the same point

on the –Out power bus.

•At the discretion of the power

system designer, a subset of all

modules within an array may be

configured as slaves by shorting

SC to –S.

•OR’ing diodes may be inserted in

series with the +Out pins of each

module to provide

module output fault tolerance.

CONTROL FUNCTIONS - PR PIN

Parallel Operation

The PR pin supports paralleling for increased power with N+1

(N+M) redundancy and phased array capability. Modules of

the same input voltage, output voltage, and power level will

current share if all PR pins are suitably interfaced.

Compatible interface architectures include the following:

DC coupled single-wire interface. All PR pins are directly

connected to one another. This interface supports current

sharing but is not fault tolerant. Minus In pins must be tied to

the same electric potential. See Figure 9.

AC coupled single-wire interface. All PR pins are connected

to a single communication bus through 0.001µF (500V)

capacitors. This interface supports current sharing and is fault

tolerant except for the communication bus. See Figure 10.

PIN STYLES

Description Notes

Short solder Requires in-board, mounting

Long solder On-board mounting for 0.65" boards

Short ModuMate SurfMate or in-board socket mounting

Long ModuMate On-board socket mounting

Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 24Vin/3.3Vout/132W DC-DC Converter Rev. 5.2 Page 7 of 9

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(2X)

0.01

0.35

8,8

0.20**

5,1

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

FULL R (6X)

(6X)

(REF.)

0.10

2,5

1.30

33,0

2.28

57,9

2.20

55,9

0.130

3,30

0.49

12,4

0.65

16,5

0.06

1,5

R (3X)

X 45˚

CHAMFER

Use a 4-40 Screw (6X)

Torque to:

5 in-lbs

.57 N-m

0.54

13,7

0.43

10,9

Pin Style 2&N

(Long Pin)

0.62

15,7

Pin Style 1&S

(Short Pin)

(9X)

Slotted (Style 1)

Threaded (Style 2)

4-40 UNC-2B (6X)

Thru Hole (Style 3)

#30 Drill Thru (6X)

(0.1285)

(ALL MARKINGS

THIS SURFACE)

ALUMINUM

BASEPLATE

0.50 ±0.02

12,7 ±0,5

* Style 1 baseplate only

** Style 2 & 3 baseplates

*** Reserved for Vicor accessories

Not for mounting

style 2 & 3

baseplates only

(4X)***

0.300 ±0.015

7,62 ±0,38

0.300 ±0.015

7,62 ±0,38 1.900

48,26

2.000

50,80 0.10

2,5

MECHANICAL DRAWINGS

Converter Pins

No. Function Label

1 +In +

2Primary PC

Control

3 Parallel PR

4–In –

5–Out –

6–Sense –S

7Secondary SC

Control

8 +Sense +S

9+Out +

MODULE OUTLINE

PINS:TIN/LEAD

HOT SOLDER DIP

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

1,5

R (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)

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

PINS STYLES

STYLE 1 & 2: TIN/LEAD

HOT SOLDER DIPPED

STYLE S & N: GOLD PLATED COPPER

ALUMINUM

BASEPLATE

PCB MOUNTING SPECIFICATIONS

Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 24Vin/3.3Vout/132W DC-DC Converter Rev. 5.2 Page 8 of 9

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PART NUMBERS & OPTIONS

24Vin / 3.3Vout / 132Watts

Part Number Pins Base Grade Minimum Max Minimum

Operating Operating Storage

Temp Temp Temp

VI-882437 Short Solder Slotted C -20°C 100°C -40°C

VI-882438 Long Solder Slotted C -20°C 100°C -40°C

VI-882439 Short ModuMate Slotted C -20°C 100°C -40°C

VI-882440 Long ModuMate Slotted C -20°C 100°C -40°C

VI-882441 Short Solder Threaded C -20°C 100°C -40°C

VI-882442 Long Solder Threaded C -20°C 100°C -40°C

VI-882443 Short ModuMate Threaded C -20°C 100°C -40°C

VI-882444 Long ModuMate Threaded C -20°C 100°C -40°C

VI-882445 Short Solder Thru-hole C -20°C 100°C -40°C

VI-882446 Long Solder Thru-hole C -20°C 100°C -40°C

VI-882447 Short ModuMate Thru-hole C -20°C 100°C -40°C

VI-882448 Long ModuMate Thru-hole C -20°C 100°C -40°C

VI-882449 Short Solder Slotted T -40°C 100°C -40°C

VI-882450 Long Solder Slotted T -40°C 100°C -40°C

VI-882451 Short ModuMate Slotted T -40°C 100°C -40°C

VI-882452 Long ModuMate Slotted T -40°C 100°C -40°C

VI-882453 Short Solder Threaded T -40°C 100°C -40°C

VI-882454 Long Solder Threaded T -40°C 100°C -40°C

VI-882455 Short ModuMate Threaded T -40°C 100°C -40°C

VI-882456 Long ModuMate Threaded T -40°C 100°C -40°C

VI-882457 Short Solder Thru-hole T -40°C 100°C -40°C

VI-882458 Long Solder Thru-hole T -40°C 100°C -40°C

VI-882459 Short ModuMate Thru-hole T -40°C 100°C -40°C

VI-882460 Long ModuMate Thru-hole T -40°C 100°C -40°C

VI-882461 Short Solder Slotted H -40°C 100°C -55°C

VI-882462 Long Solder Slotted H -40°C 100°C -55°C

VI-882463 Short ModuMate Slotted H -40°C 100°C -55°C

VI-882464 Long ModuMate Slotted H -40°C 100°C -55°C

VI-882465 Short Solder Threaded H -40°C 100°C -55°C

VI-882466 Long Solder Threaded H -40°C 100°C -55°C

VI-882467 Short ModuMate Threaded H -40°C 100°C -55°C

VI-882468 Long ModuMate Threaded H -40°C 100°C -55°C

VI-882469 Short Solder Thru-hole H -40°C 100°C -55°C

VI-882470 Long Solder Thru-hole H -40°C 100°C -55°C

VI-882471 Short ModuMate Thru-hole H -40°C 100°C -55°C

VI-882472 Long ModuMate Thru-hole H -40°C 100°C -55°C

Vicor Corp. Tel: 800-735-6200, 978-470-2900 Fax: 978-475-6715 24Vin/3.3Vout/132W DC-DC Converter Rev. 5.2 02/03

Vicor’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

Vicor Express: vicorexp@vicr.com

Technical Support: apps@vicr.com

Component Solutions

for Your Power System

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