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Modular Approach Simplifies Power-System Design 2008-01-04
A new generation of integrated and intelligent power modules is reducing the time needed to design, assemble and deliver power-conversion and drive systems.
Rectifier ICs and Thermal Packaging Enhance SMPS 2008-01-04
New synchronous rectifi cation controllers and thermally enhanced device packages can reduce the form factor and increase the effi ciency of the switched-mode power supply in a mini-PC.
Enhance Triac Reliability Through Thermal Design 2008-01-04
Appliance applications illustrate how to perform the necessary thermal calculations using datasheet information supplied by the semiconductor vendor.
Nonlinear Fin Patterns Keep Cold Plates Cooler 2008-01-04
Altering the fin geometry of liquid-cooled cold plates improves their thermal efficiency.
Reticulated Metal Foams Build Better Heatsinks 2008-01-04
An alternative to conventional finned heatsinks and coldplates, blocks of RMF material can provide greater cooling for power modules with high levels of power dissipation.
Why Is My DC-DC Converter Too Hot? 2008-01-04
To properly interpret thermal-derating curves provided by power-module manufacturers, engineers must determine the test conditions under which the curves were derived.The bulleted items on the front p
What is the difference between continuous-conduction mode (CCM) and discontinuous-conduction mode (DCM) 2007-07-27
Question: What is the difference between continuous-conduction mode (CCM) and discontinuous-conduction mode (DCM)? Original Question: Can you tell me anything about continuous mode power converters? O
A Novel Control Method to Minimize Distortion in AC Inverters (IEEE) 2007-06-25
Abstract—In pulse-width-modulation (PWM) ac inverters, the duty-cycle modulator transfer function must be highly linear to achieve low distortion. Current-mode (CM) control, inherently nonlinear, is
How to Generate Auxiliary Supplies from a Positive Buck DC-DC Converter 2007-05-31
Abstract: Many applications require a low-power supply in addition to the main supply. For reasons of cost, inventory management, or electromagnetic compatibility (EMC) , a separate converter may not
Precision Circuit Monitors Negative Supply Current 2007-05-31
Abstract: This current-sensing circuit monitors a negative power supply and provides a positive output voltage proportional to the load current. Key Words: current monitoring, current mirror, negative
The FET-OR Connection for Power Supplies 2007-05-31
Abstract: This power-supply sequencer senses a loss of the main supply voltage and, by controlling the two FETs, automatically switches the load to the secondary (backup) supply. Key Words : backup su
Automotive Linear Regulators Minimize Quiescent Current 2007-05-31
Abstract: Many automotive mechanical functions have been replaced or amended by electronic circuits in recent years. One consequence has been a rapid increase in the number of microcontrollers per car
±15V or ±12V Output Switch-Mode Power Supply Has Wide Input-Voltage Range 2007-05-31
Abstract: This application note illustrates how to use the MAX668 boost circuit and the MAX1846 inverting circuit to implement a switch-mode power supply that provides a ±12V or ±15V at 0.5A output
Powering Multiple VTMs with a Single PRM 2007-05-23
Introduction This application note discusses the design practices for using Vicor’s V • I Chip Pre-Regulator Module and Voltage Transformation Module to meet the challenge of power systems that
Converter PR Pin Facilitates Parallel Operation for Power Expansion or Redundancy 2007-05-23
A unique feature has been designed into Vicor’s Second Generation converter modules which facilitates parallel operation for power expansion or redundancy. The “PR” pin is a bi-directional port tha
Hot Swap Capability Eliminates Down Time 2007-05-23
Systems applications which employ fault tolerant power delivery architectures, usually require “Live Swap” capability for zero downtime. Modern telecommunications and data communications systems are
UC2577 Controls SEPIC Converter for Automotive Applications 2007-05-23
The Single Ended Primary Inductance Converter (SEPIC) can convert an input voltage to an output voltage that is higher, lower or equal to the input. Conversion is performed without the use of expensiv
Data Slicing Techniques for UHF ASK Receivers 2007-05-22
Abstract: Amplitude-shift keying (ASK) and on-off keying (OOK) receivers are used for intermittent low-data-rate applications like RKE, home security, garage-door openers, and remote controls. The dat
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