PS1-01-05-G datasheet, PDF - EEWORLD Datasheet

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PS1-01-05-G: Descriptionfan cld AC-DC PS 5V 400w; Categorysemiconductor Power management; File Size1MB，29 Pages; ManufacturerVICOR; Websitehttp://www.vicorpower.com/; Environmental Compliance

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USER GUIDE | UG:115

PFC Mini

Power Factor Corrected AC-DC Switcher

March 2010

Contents

Overview

of Product

Mechanical

Considerations

PFC Mini

Do’s and Don’ts

Technical Description

PFC Mini

Configuration

Layout

Part Numbering

Quick Install

Instructions

Mechanical Drawings

Output Connectors

Interface Connections

Output Power

De-rating

Specifications

Current Share Boards

Low Leakage Version

Low Output Ripple

Page

Overview

The PFC Mini is an extremely low profile, 1 RU, switching power supply that combines

the advantages of power factor correction and high power density. This design guide

covers both standard and rugged chassis COTS (MI) versions of the product. The PFC

Mini can provide up to six isolated outputs (three slots) and each slot accommodates

the following Vicor DC-DC Converters.

VI/E-200 and VI/E-J00 series:

One VI/E-200 or Two VI/E-J00 converters

Maxi, Mini Micro series:

One Maxi, Two Mini converters (Micros cannot be used)

The use of these converters give the PFC Mini the inherent power flexibility typical

of all Vicor products. Using the VSPOC configurator tool available on

vicorpower.

com,

anybody can now configure a PFC Mini (and other Vicor power supplies) online.

Accepting input voltages of 85 Vac to 264 Vac, and 100 Vdc to 380 Vdc, the PFC Mini can

provide up to 1,500 Watts in a package size of 1.72" H (43,6 mm) x 6" W (152,4 mm)

x 12.2" L (309,9 mm). The PFC Mini is factory configured to meet user requirements.

Note:

If you have a PFC Mini that shipped from October 2005 onwards, please see Page 19

for more details.

UG:115

vicorpower.com

Applications Engineering: 800 927.9474

Page 1

When selecting a mounting location and orientation, the unit should be positioned so

airflow is not restricted. Maintain a 2" (5,1 cm) minimum clearance at both ends of the

PFC Mini, and route all cables so airflow is not obstructed. The power supply draws air

in at the fan side/AC input side and exhausts air out the load side. If airflow ducting is

used, avoid sharp turns that could create back pressure. The fans move approximately

20 CFM of air.

Avoid excessive bending of output power cables after they are connected to the output

terminals. For high-current outputs, use cable ties to support heavy cables and minimize

mechanical stress on connectors. Be careful not to short-out to neighboring outputs. The

maximum torque recommended on output nuts is 10 in. lbs.

Avoid applications in which the unit is exposed to excessive shock or vibration levels. In

such applications, a shock-absorbing mount design is required.

PFC Mini Do’s and Don’ts

If Sense jumpers are removed, do not leave Sense lines open

(especially if unit does not have Autosense). Sense lines must be terminated to

their respective outputs. Use twisted pair 20-22 AWG wire when installing

Remote Sense.

NEVER

disconnect the +Out and -Out load wires while the supply is operating as

disconnecting WILL cause damage to the power supply. Ensure load wires connected

before remote sense connected.

To prevent damage to supply, verify polarity of remote sense connection before

turning supply on.

Always turn the power supply off before disconnecting input or output wires.

Do not restrict airflow to the unit. The cooling fan draws air into the unit and forces it

out at the output terminals.

Run the output (+/–) power cables next to each other to minimize inductance.

Do not repair or modify the power supply in any manner. Doing so will void the

warranty. Contact Factory.

Insert proper fault protection at power supply input terminals (i.e., a fuse).

Use proper size wires to avoid overheating and excessive voltage drop.

Output voltages over 60 Vdc, whether from individual modules or series arrays, are

considered as hazardous secondary outputs under UL60950. Appropriate care must

be taken in design implementation of the supply.

Technical Description

The PFC Mini consists of an offline single phase, power-factor-corrected front end, EMI

filter, cooling fan, customer interface, associated housekeeping circuits, and a selection

of Vicor’s DC-DC converters.

Input AC mains voltage is applied to a terminal block. The input current is passed

through an EMI filter designed to meet conducted noise limit “B” specifications in

FCC Part 15 and EN55022, Class B (with VI-200/VI-J00 series modules. If Maxi, Mini,

Micro series modules are used, it meets FCC Class A and EN55022 Class A. (Certain

configurations meet Class B).

At start-up, inrush current is limited by a PTC thermistor. The PTC is shunted out shortly

after initial power-up by a DC bus voltage sense circuit driving a relay. After rectification,

the input voltage is put through a boost converter that keeps the AC input current

sinusoidal and synchronized with the input AC voltage (in compliance with

UG:115

vicorpower.com

Applications Engineering: 800 927.9474

Page 3

EN61000-3-2). The boost converter delivers a regulated input to the hold-up capacitors

and a high-voltage backplane. The backplane supplies power to the DC-DC converters

that provide the desired low voltage regulated outputs.

Voltage conversion is achieved by Vicor’s family of zero-current switching (ZCS) DC-DC

converters. These are forward converters in which the main switching element switches

at zero current. This patented topology has a number of unique attributes: low switching

losses; high frequency operation, resulting in reduced size for magnetics and capacitors;

excellent line and load regulation; wide adjustment range for output; low EMI/RFI

emission and high efficiencies.

At initial power-up, the PFC Mini outputs are disabled to limit the inrush current and

to allow the DC bus potential to settle out to the correct operating level. A low-power

flyback converter operating with PWM current-mode control converts the high voltage

DC bus into regulated low voltage to power the internal housekeeping circuits and

DC cooling fans.

The internal housekeeping V

comes up within two seconds after the application of

input power. Once the high voltage bus is within operating limits, the AC Power OK

signal asserts to a TTL "1," indicating the input power is OK, and enables the power

outputs. An auxiliary V

output of 5 Vdc sourcing up to 0.3 A is provided for

peripheral use.

An output Enable/Disable function is provided by using an optocoupler to control

Vicor’s DC-DC converters. If the Enable/Disable control pin is pulled low, the

optocoupler turns on and disables the output. The nominal delay associated for an

output to come up when measured from release of the Enable/Disable pin is 5-10 ms.

The General Shutdown function controls all outputs simultaneously and works in a

similar manner.

Figure 1.

Input

Line Filter

Rectifier

Waveform

Sample

Current

Sample

PFC Control

Output Card #3

Customer

Interface

Enable/Disable Control

Power

Output

Soft Start

Circuit

Boost Converter

High Voltage

Bus

Output Card #1

Power

Output

Output Card #2

Power

Output

E/D Control

Fan

Isolated

Housekeeping

Power

UG:115

vicorpower.com

Applications Engineering: 800 927.9474

Page 4

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