QBVW025A0B Datasheet, PDF (1/18 Pages) Vishay Siliconix – 36-75Vdc Input; 12Vdc Output; 25A Output Current

Data Sheet
May 16, 2012
QBVW025A0B Series Power Modules; DC-DC Converters
36-75V_dc Input; 12V_dc Output; 25A Output Current
BARRACUDA SERIES™
Applications
RoHS Compliant
 Distributed power architectures
 Intermediate bus voltage applications
 Servers and storage applications
 Networking equipment including Power over
Ethernet (PoE)
 Fan assemblies and other systems requiring a
tightly regulated output voltage
Options
 Negative Remote On/Off logic (1=option code,
factory preferred)
 Auto-restart after fault shutdown (4=option code,
factory preferred)
 Remote Sense and Output Voltage Trim (9=option
code)
 Base plate option (-H=option code)
 Passive Droop Load Sharing (-P=option code)
Features
 Compliant to RoHS EU Directive 2002/95/EC (-Z
versions)
 High and flat efficiency profile – >95.5% at 12Vdc,
40% load to 100% output
 Wide Input voltage range: 36-75Vdc
 Delivers up to 25Adc output current
 Fully very tightly regulated output voltage
 Low output ripple and noise
 Industry standard, DOSA Compliant Quarter brick:
58.4 mm x 36.8 mm x 11.7 mm
(2.30 in x 1.45 in x 0.46 in)
 Constant switching frequency
 Positive Remote On/Off logic
 Output over current/voltage protection
 Over temperature protection
 Wide operating temperature range (-40°C to 85°C)
 UL* 60950-1, 2nd Ed. Recognized, CSA† C22.2
No. 60950-1-07 Certified, and VDE‡ (EN60950-1,
2nd Ed.) Licensed
 CE mark to 2006/96/EC directive^§
 Meets the voltage and current requirements for
ETSI 300-132-2 and complies with and licensed for
Basic insulation rating per EN60950-1
 2250 Vdc Isolation tested in compliance with IEEE
802.3^¤ PoE standards
 ISO** 9001 and ISO14001 certified manufacturing
facilities
Description
The QBVW025A0B series of dc-dc converters are a new generation of fully regulated DC/DC power modules
designed to support 12Vdc intermediate bus applications where multiple low voltages are subsequently generated
using point of load (POL) converters, as well as other application requiring a tightly regulated output voltage. The
QBVW025A0B series operate from an input voltage range of 36 to 75Vdc and provide up to 25A output current at
output voltages of 12Vdc in an industry standard, DOSA compliant quarter brick. The converter incorporates digital
control, synchronous rectification technology, a fully regulated control topology, and innovative packaging
techniques to achieve efficiency exceeding 96% at 12V output. This leads to lower power dissipations such that for
many applications a heat sink is not required. Standard features include on/off control, output overcurrent and over
voltage protection, over temperature protection, input under and over voltage lockout.
The output is fully isolated from the input, allowing versatile polarity configurations and grounding connections. Built-
in filtering for both input and output minimizes the need for external filtering.
* UL is a registered trademark of Underwriters Laboratories, Inc.
† CSA is a registered trademark of Canadian Standards Association.
‡ VDE is a trademark of Verband Deutscher Elektrotechniker e.V.
§ This product is intended for integration into end-user equipment . All of the required procedures of end-use equipment should be followed.
¤ IEEE and 802 are registered trademarks of the Institute of Electrical and Electronics Engineers, Incorporated.
** ISO is a registered trademark of the International Organization of Standards.
Document No: ds11-002 ver 1.3
PDF Name: QBVW025A0B.pdf