DC-DC Converter Module

VE-820005B

Mini – 300 Vin / 28 Vout / 200 Watts

Features
• DC input range: 180 - 450 V
• Input surge withstand: 525 V for 100 ms
• DC output: 28 V
• Programmable output: 10 to 110%
• Regulation: ±0.2% no load to full load
• Efficiency: 86.8%
• Maximum operating temperature: Size:
100°C at full load 2.28 x 2.2 x 0.5 in
• Height above board: 0.43 in. (10,9 mm) 57,9 x 55,9 x 12,7 mm
• Parallelable, with N+M fault tolerance
• Low noise ZCS/ZVS architecture
• Pin style: FALSE
• Baseplate: FALSE

Product Overview Absolute Maximum Ratings

This DC-DC converter module uses
advanced power processing, control and Parameter Rating Unit Notes
packaging technologies to provide the +In to –In voltage -0.5 to +551 Vdc
performance, flexibility, reliability and cost
+In to –In voltage 525 Vdc <100 ms
effectiveness of a mature power component.
High frequency ZCS/ZVS switching PC to –In voltage -0.5 to +7 Vdc
provides high power density with low PR to –In voltage -0.5 to 7 Vdc
noise and high efficiency. +Out to –Out voltage -0.5 to + 36.9 Vdc
+Sense to –Out voltage -0.5 to 36.9 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 Test voltage
in to base 1550 Vrms Test voltage
out to base 500 Vrms Test voltage
Storage temperature -40 to +125 °C
Operating temperature -40 to +100 °C Baseplate
Pin soldering temperature 500 (260) °F (°C) <5 sec; wave 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

DC-DC Converter Rev 1.0 vicorpower.com

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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.

MODULE OPERATING SPECIFICATIONS

Parameter Min Typ Max Unit Notes

Operating input voltage 180 300 450 Vdc
Input surge withstand 525 Vdc <100 ms
Output voltage setpoint 27.72 28 28.28 Vdc Nominal input; full load; 25°C
Output OVP setpoint 31.5 32.7 33.9 Vdc 25°C; recycle input voltage to restart ( 100 ms off )
Output power 200 Watts At 100°C baseplate temperature
Efficiency 85.8 86.8 % Nominal input; 75% of full load; 25°C

MODULE INPUT SPECIFICATIONS

Parameter Min Typ Max Unit Notes

Undervoltage turn-on 174.6 178.2 Vdc
Undervoltage turn-off 147.4 152.8 Vdc
Overvoltage turn-off 454.4 472.5 495 Vdc
Dissipation, standby 7.1 9 Watts No load

MODULE OUTPUT SPECIFICATIONS

Parameter Min Typ Max Unit Notes

Line regulation ±0.02 ±0.2 % Low line to high line; full load
Load regulation ±0.02 ±0.2 % No load to full load; nominal input
Temperature regulation ±0.002 ±0.005 % / °C -20 to 100°C
Ripple and noise, p-p 240 300 mV Nominal input; full load; 20 MHz bandwidth
Load current 0 7.14 Amps
Current limit 7.28 8.21 9.64 Amps Output voltage 95% of nominal
Short circuit current 4.99 8.21 9.64 Amps Output voltage <250 mV
Power sharing accuracy ±2 ±5 % 10 to 100% of full load
Of nominal output voltage. For trimming below 90%
Programming range 10 110 % of nominal, a minimum load of 10% of maximum
rated power may be required.

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.

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ELECTRICAL CHARACTERISTICS, CONT.
THERMAL RESISTANCE AND CAPACITY

Parameter Min Typ Max Unit Notes

Baseplate to sink; flat,
0.16 °C/Watt
greased surface
Baseplate to sink;
0.14 °C/Watt
thermal pad (P/N 20264)
Baseplate to ambient 8.0 °C/Watt
Baseplate to ambient; 1000 LFM 1.9 °C/Watt
Thermal capacity 83 Watt-sec/°C

MODULE CONTROL SPECIFICATIONS

Parameter Min Typ Max Unit Notes

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

PC bias voltage 5.50 5.75 6.10 Vdc PC current = 1.0 mA
current limit 1.5 2.1 3 mA PC voltage = 5.5 V
PC module disable 2.3 2.6 2.9 Vdc Must be able to sink ≥4 mA. See Fig. 2
PC module enable delay 4 7 ms
PC module alarm 0.5 Vavg UV, OV, OT, module fault. See Figs. 3 and 5
PC resistance 0.9 1.0 1.1 MΩ See Fig. 3
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 Ω 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 Ω
SC capacitance 0.033 µF
SC module alarm 0 Vdc With open trim; referenced to –Sense. See Fig. 7

MODULE GENERAL SPECIFICATIONS

Parameter Min Typ Max Unit Notes

Remote sense (total drop) 0.5 Vdc 0.25 V 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 MΩ
Weight 3.7 (104) 4 (112) ounces (grams)
Temperature limiting 100 115 °C See Figs. 3 and 5, Temperature limiting disabled

Agency approvals

DC-DC Converter Rev 1.0 vicorpower.com

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BASIC MODULE OPERATION

C2* C4*
4.7nF 4.7nF

+IN +OUT

F1* PC
+S

SC
C1*
PR
0.2µF –S

–IN –OUT

C3*
4.7nF C5*
4.7nF

For C1 – C5, keep leads and connections short.

Figure 1 — Basic module operation requires fusing, grounding, bypassing capacitors.

* See Maxi, Mini, Micro Design Guide.

Comprehensive Online Application Information

The Design Guide and Applications Manual includes:

• Application circuits
• Design requirements
• EMC considerations
• Current sharing in power arrays
• Thermal performance information
• Recommended soldering methods
• Accessory modules – filtering, rectification, front-ends
• Mounting options
...and more.

CLICK HERE TO VIEW

DESIGN GUIDE

Also at vicorpower.com
• PowerBench online configurators
• Over 20 Application Notes
• Online calculators – thermal, trimming, hold-up
• PDF data sheets for ALL Vicor products

DC-DC Converter Rev 1.0 vicorpower.com

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PRIMARY CONTROL - PC PIN
Module Enable/Disable Module Alarm
The module may be disabled by pulling PC to 0 V (2.3 V The module contains “watchdog” circuitry which monitors
max) with respect to the –Input. This may be done with an input voltage, operating temperature and internal operating
open collector transistor, relay, or optocoupler. Converters parameters. In the event that any of these parameters are
may be disabled with a single transistor or relay either directly outside of their allowable operating range, the module will
or via “OR’ing” diodes for 2 or more converters. See Figure 2. shut down and PC will go low. PC will periodically go high
Primary Auxiliary Supply and the module will check to see if the fault (as an example,
Input Undervoltage) has cleared. If the fault has not been
During normal operation only, the PC Pin can source 5.7 V @ cleared, PC will go low again and the cycle will restart. The
1.5 mA. In the example shown in Figure 4, PC powers a mod- SC pin will go low in the event of a fault and return to its nor-
ule enabled LED. mal state after the fault has been cleared. See Figures 3 and 5.

Input Undervoltage
Input Overvoltage (See Note 1)
+In +Out +IN Auto Overtemperature +OUT
Restart Module Faults
SW1
PC +S PC +S
2-20 ms typ.
f (VIN)
50 Ω
SC SW1, 2, & 3
1K
SC
shown in SW2 SW3
Disable PR 1M
PR –S "Fault" position –S
5.7 Vdc
–In –Out –IN (0-3 mA) 1.23 – OUT
Vdc 6K
Disable = PC <2.3V
1 Not applicable for 300 Vdc input family

Figure 2 — Module enable/disable. Figure 3 — PC/SC module alarm logic.

+In +Out Fault 40 μs typ.

PC 5.7 V
+S PC
4kΩ SC
"Module
Enabled" PR –S
1.23 V
–In –Out SC 2–20 ms typ.

Figure 4 — LED on-state indicator. Figure 5 — PC/SC module alarm timing.

Optocoupler +In +Out +In +Out

4 kΩ PC +S PC +S
SC SC
Alarm
PR –S PR –S
–In –In 1.00V
–Out –Out

Figure 6 — Isolated on-state indicator. Figure 7 — Secondary side on-state indicator.

DC-DC Converter Rev 1.0 vicorpower.com

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SECONDARY CONTROL - SC PIN PARALLEL BUS - PR PIN
Output Voltage Programming Parallel Operation
The output voltage of the converter can be adjusted or The PR pin supports paralleling for increased power with N+1
programmed via fixed resistors, potentiometers or voltage (N+M) redundancy. Modules of the same input voltage, output
DACs. See Figure 8. voltage, and power level will current share if all PR pins are
suitably interfaced.
Compatible interface architectures include the following:
+OUT
AC coupled single-wire interface. All PR pins are connected
+S to a single communication bus through 0.001 µF (500 V)
Error Amplifier capacitors. This interface supports current sharing and is fault
Ru
– Trim Up tolerant except for the communication bus. Up to three
+
SC converters may be paralleled by this method. See Figure 9.
Load
1 kΩ
Rd Transformer coupled interface. For paralleling four or more
0.033 uF Trim Down
converters a transformer coupled interface is required. See
+

1.23 V
-S Figure 10.
100 Ω typ.
–OUT
For details on parallel operation please refer to the
Design Guide & Applications Manual for Maxi, Mini, Micro Family.

Rd (ohms) = 1,000 Vout

Vnom – Vout 4.7 nF
+ +IN
RU (ohms) = 1,000 (Vout –1.23) Vnom – 1,000 0.2 µF

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

1.23 (Vout – Vnom) PC
0.001 µF Z1* Module 1
PR
–
–IN
Low inductance 4.7 nF
Trim Down ground plane
or bus

1. This converter is not a constant power device – it has a 4.7 nF

+IN
constant current limit. Hence, available output power is 0.2 µF
PC
reduced by the same percentage that output voltage is 0.001 µF Z1*
Module 2
trimmed down. Do not exceed maximum rated output current. PR

–IN
2. The trim down resistor must be connected between the SC
and -S pins. Do not bypass the SC pin directly with a Parallel
4.7 nF

Figure 9 — AC coupled single-wire interface.

capacitor. Bus

Trim Up
* See Maxi, Mini, Micro Design Guide.
1. The converter is rated for a maximum delivered power. To
ensure that maximum rated power is not exceeded, reduce
maximum output current by the same percentage increase in 4.7 nF
output voltage. + +IN

2. The trim up resistor must be connected between the SC T1

0.2 µF PC
Module 1
Z1*
and +S pins. Do not bypass the SC pin directly with a PR
capacitor. –IN
–
3. Do not trim the converter above maximum trim range 4.7 nF

(typically +10%) or the output over voltage protection 4.7 nF

circuitry may be activated. +IN

0.2 µF PC Module 2
T2 Z1*
Trim resistor values calculated automatically: PR
On-line calculators for trim resistor values are available on the –IN

asp.vicorpower.com/calculators/calculators.asp?calc=1
vicor website at:
4.7 nF
Parallel
Resistor values can be calculated for fixed trim up, fixed trim

Figure 10 — Transformer-coupled interface.

Bus
down and for variable trim up or down.

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PARALLEL BUS OUTPUT

+OUT • The +Out and –Out power buses should be designed to

+S
minimize and balance parasitic impedance from each
module output to the load.
Module 1 SC
–S • The +Sense pins must be tied together to form a
–OUT +Sense bus. This must be Kelvin connected to +Out
at a single point. The –Sense pins should be tied
+S together to form a –Sense bus. This must be Kelvin
connected to –Out at a single point.
+OUT
• At the discretion of the power system designer,
+S
Module 2 Load a subset of all modules within an array may be
SC
configured as slaves by connecting SC to –S.
–S
–OUT • OR’ing diodes may be inserted in series with the
–S +Out pins of each module to provide module
output fault tolerance.
+OUT • The +Sense and -Sense leads should be routed in close
+S proximity to each other on the printed circuit board. If
Module N+1 SC
wires are used to connect the converters on a PCB to
–S
an external load, the Sense leads should be twisted
together to reduce noise pickup.
–OUT

Figure 11 — N+1 module array output connections.

DC-DC Converter Rev 1.0 vicorpower.com

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MECHANICAL DRAWINGS

Converter Pins
No. Function Label
1 +In +
Primary
2 PC
Control
3 Parallel PR
4 –In –
5 –Out –
6 –Sense –S
Secondary
7 SC
Control
8 +Sense +S
9 +Out +

Figure 12 — Module outline

INBOARD ONBOARD ALL MARKINGS

SOLDER SOLDER THIS SURFACE
MOUNT MOUNT

SHORT PIN STYLE LONG PIN STYLE

0.062 ±0.010 0.094 ±0.003 0.094 ±0.003
PCB THICKNESS (7X)
1,57 ±0,25 2,39 ±0,08 2,39 ±0,08
PLATED
THROUGH HOLE 0.164 ±0.003 0.164 ±0.003
1.790** (2X)
DIA 4,16 ±0,08 4,16 ±0,08
0.06 45,47
R (4X) 0.158
1,5 ALUMINUM
4,01
BASEPLATE
PINS STYLES
1 2 3 4
SOLDER:TIN / LEAD PLATED
MODUMATE: GOLD PLATED COPPER
RoHS: GOLD PLATED COPPER
1.900* 1.575**
48,26
48.26 40,00

9 8 7 6 5
FOR SOLDERING METHODS AND PROCEDURES
PLEASE REFER TO THE MAXI, MINI, MICRO
DESIGN GUIDE.
0.400*
10,16 0.43
0 43
0.45
45
0.45 0.53
0.700* 11,5 13,5 Unless otherwise specified,
17,78 dimensions are in inches
mm
1.000*
25,40 ±0.003 Decimals Tol. Angles
* DENOTES TOL =
0.195 1.400* ±0,08 0.XX ±0.01
4,95 35,56 ** PCB WINDOW ±0.25 ±1°
0.XXX ±0.005
±0.127

Figure 13 — PCB mounting specifications

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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 makes no
representations or warranties with respect to the accuracy or completeness of the contents of this publication. Vicor reserves the right to make
changes to any products, specifications, and product descriptions at any time without notice. Information published by Vicor has been checked and
is believed to be accurate at the time it was printed; however, Vicor assumes no responsibility for inaccuracies. Testing and other quality controls are
used to the extent Vicor deems necessary to support Vicor’s product warranty. Except where mandated by government requirements, testing of all
parameters of each product is not necessarily performed.
Specifications are subject to change without notice.

Vicor’s Standard Terms and Conditions

All sales are subject to Vicor’s Standard Terms and Conditions of Sale, which are available on Vicor’s webpage or upon request.

Product Warranty
In Vicor’s standard terms and conditions of sale, Vicor warrants that its products are free from non-conformity to its Standard Specifications (the
“Express Limited Warranty”). This warranty is extended only to the original Buyer for the period expiring two (2) years after the date of shipment
and is not transferable.
UNLESS OTHERWISE EXPRESSLY STATED IN A WRITTEN SALES AGREEMENT SIGNED BY A DULY AUTHORIZED VICOR SIGNATORY, VICOR DISCLAIMS
ALL REPRESENTATIONS, LIABILITIES, AND WARRANTIES OF ANY KIND (WHETHER ARISING BY IMPLICATION OR BY OPERATION OF LAW) WITH
RESPECT TO THE PRODUCTS, INCLUDING, WITHOUT LIMITATION, ANY WARRANTIES OR REPRESENTATIONS AS TO MERCHANTABILITY, FITNESS FOR
PARTICULAR PURPOSE, INFRINGEMENT OF ANY PATENT, COPYRIGHT, OR OTHER INTELLECTUAL PROPERTY RIGHT, OR ANY OTHER MATTER.

This warranty does not extend to products subjected to misuse, accident, or improper application, maintenance, or storage. Vicor shall not be liable
for collateral or consequential damage. Vicor disclaims any and all liability arising out of the application or use of any product or circuit and assumes
no liability for applications assistance or buyer product design. Buyers are responsible for their products and applications using Vicor products and
components. Prior to using or distributing any products that include Vicor components, buyers should provide adequate design, testing and operat-
ing safeguards.
Vicor will repair or replace defective products in accordance with its own best judgment. 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.

Life Support Policy

VICOR’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS
PRIOR WRITTEN APPROVAL OF THE CHIEF EXECUTIVE OFFICER AND GENERAL COUNSEL OF VICOR CORPORATION. As used herein, life support
devices or systems are devices which (a) are intended for surgical implant into the body, or (b) support or sustain life and whose failure to perform
when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in a significant injury to the
user. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or system or to affect its safety or effectiveness. Per Vicor Terms and Conditions of Sale, the user of Vicor products
and components in life support applications assumes all risks of such use and indemnifies Vicor against all liability and damages.

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Vicor and its subsidiaries own Intellectual Property (including issued U.S. and Foreign Patents and pending patent applications) relating to the prod-
ucts described in this data sheet. No license, whether express, implied, or arising by estoppel or otherwise, to any intellectual property rights is
granted by this document. Interested parties should contact Vicor's Intellectual Property Department.

Vicor Corporation
25 Frontage Road
Andover, MA, USA 01810
Tel: 800-735-6200
Fax: 978-475-6715

email
Customer Service: custserv@vicorpower.com
Technical Support: apps@vicorpower.com

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