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Vishay unveils new package type for rectifier, TVS products

Posted: 17 Dec 2004 ?? ?Print Version ?Bookmark and Share

Keywords:vishay intertechnology? vishay? package type? rectifier? transient voltage suppressor?

Vishay Intertechnology Inc. disclosed in a press release that it has launched a new package type for its rectifier and transient voltage suppressor (tvs) products that deliver the same current and power ratings as the SMA package in a 44 percent smaller footprint.

According to the company, the devices in the new SMP package set new standards for rectifier current density, and can handle up to 2A while delivering industry-record levels of thermal resistance. The more than 45 Vishay products released in the SMP package include Schottky, standard and ultrafast rectifiers, as well as TVS. These devices are aimed at power supply and power conversion applications in desktop and notebook PCs, servers, disk drives, mobile phones, PDAs, hybrid ICs, and automobile electronic sensors and control units, where the 1mm height and 2-by-3.8mm footprint of the SMP package allows designers to reduce the size of power circuitry.

Six Schottky rectifiers in the SMP package were released. Designed for secondary rectification of ac-to-dc and dc-to-dc converters, freewheeling, and polarity protection, they can handle voltages from 20V to 40V and maximum currents of 1A (SS1P3L and SS1P4L) and 2A (SS2P2, SS2P3, SS2P4, SS2P2L and SS2P3L). Featuring a low forward voltage drop, these rectifiers improve power efficiency and generate less heat in end products, resulting in increased reliability and a higher comfort level during use.

Meanwhile, the standard rectifiers announced (S1PA through S1PJ) can handle 1A and 50V to 600V of power, making them a suitable optimal solution for general-purpose rectification, polarity protection, and rail-to-rail protection in automotive applications.

With 1A and 50V to 200V capabilities, the new ultrafast rectifiers offer designers a choice of recovery times as fast as 15ns for computers and other consumer electronics applications (ES1PA through ES1PD) or low leakage currents for the high-temperature automotive environment (ESH1PA through ESH1PD).

Typical junction-to-case thermal resistance for all of the above-mentioned products is 20C/W. Offering twice the power rating of the nearest competitor in a sub-SMA package, Vishay's new TVS devices in the SMP package can handle up to 400W with breakdown voltages from 13V to 43V. Used in consumer, computer, industrial and automotive applications, the new devices (TPSMP13 through TPSMP43) are designed to protect ICs, transistors, signal lines of sensor units, and electronic units from electrostatic discharges, lightning surges and other transient voltages.

The single-chip, surface-mount SMP (DO-220AA) package of these new devices features solder pads that are compatible with other surface mount devices, so no modification is needed to the PCB layout when they are used as higher-performing upgrades to existing devices.

Samples and production quantities of the SMP-packaged rectifiers and TVS are already available with lead times of six weeks for larger orders.




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