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Rectifiers boast complete SMPS solution

Posted: 20 Oct 2009 ?? ?Print Version ?Bookmark and Share

Keywords:rectifier? SMPS? switch mode power supply?

PDR5K rectifiers

Diodes Inc. has unveiled high-current rectifiers with an ultralow forward voltage (VF) drop. They are targeted for power supplies in consumer and industrial ultraslim, end-user products such as laptop and netbook adapters, LED/LCD TVs and telecom server power supplies, where low profile height and efficiency are critical.

Diodes' PDR5K is touted to be the first 5A/750V rectifier in a PowerDI5 package. In a compact, low-profile solution, the PDR5K offers reduction in profile height up to 17x compared to the height of the standard larger, bulkier bridge packages that are used in offline AC/DC switch mode power supplies (SMPS). The PowerDI5 package has a height of just 1.15mm, offering the opportunity to reduce the total form factor of the end product. The PDR5K was designed in collaboration with Vicor Corp. to meet its power and space constraint application requirements.

"The introduction of the PDR5K extends Diodes' position as a company that is committed to working closely with customers to deliver new innovative products that meet the demands of the marketplace," remarks Mark King, senior VP of sales and marketing, Diodes.

Diodes is also releasing a new family of 40A ultralow VF SBR rectifiers in a low-profile TO-262 package designed to be used as output rectifiers for SMPS devices. Using the company's patented SBR technology, the SBR40U60CTE, SBR40U100CTE, and SBR40U120CTE offer ultralow VF performance that reduces power loss for cooler operation and higher efficiency. The TO-262's package height is 31.1 percent lower in profile height compared to a standard TO-220 package.

Combining both products in a single SMPS device, the PDR5K in the primary and the SBR40UxxxCTE as output rectifiers in flyback or forward converters on the secondary side, the total solution offers the lowest package profile height with the highest efficiency.

Both the PowerDI5 and TO-262 packages are built using �green' antimony and bromine-free mold compound that is RoHS-compliant, underpinning Diode's continual commitment to manufacturing environmental friendly products.

For application notes on rectifiers click here.

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