DC/DC konverter-chip til krævende applikationer
Vicor udvider firmaets Picor 'Cool-Power' ZVS DC/DC konverterfamilie med versioner med særdeles høj powerdensitet (in english).
Vicor Corporation has announced the expansion of its ultra high density Picor Cool-Power® PI31xx series of isolated, ZVS-based DC-DC converters optimized for 24 V industrial, 28 V aerospace/defense and/or demanding wide temperature applications.
The new Cool-Power PI31xx converters retain the product series’ signature 0.87" x 0.65" x 0.265" surface-mount package profile to provide up to 334 W/in3 power density and 2,250 V input to output isolation. At less than 50% the size of a conventional isolated 1/16th brick, Cool-Power PI31xx converters provide exceptional performance in an IC package for use in high density system designs.
Cool-Power PI31xx series converters utilize an advanced Zero-Voltage Switching (ZVS) architecture and high-performance planar magnetics to enable IC-like density and greater PCB layout flexibility in space-constrained environments. The high-switching frequency (900 kHz) of PI31xx series converters reduces input filter and output capacitance requirements, further reducing space constraints.
Fully equipped with a variety of programmable features, the PI31xx includes output voltage trimming, programmable soft-start capability, and remote on/off ENABLE. There is also a temperature monitor function, providing an analog output voltage proportional to the internal module temperature.
The PI31xx is self-protected against fault conditions including: input over-voltage, under-voltage lockout, over-temperature, and output over-voltage protection. A constant current limit threshold is employed to protect against short circuit and overload conditions. All fault conditions have an auto-restart function.
When paired with 0.98" x 0.49" x 0.18" Picor QuietPower EMI filters – the smallest filters in this product category - designers are afforded an end-to-end isolated DC-DC conversion and EMI filtering solution that’s unrivaled in density optimization. QuietPower filters provide up to 99.5% efficiency and are designed for universal compatibility with high frequency switching DC-DC converters from any manufacturer.
Example products include the QuietPower QPI-12 filter with high common-mode (>40dB) and high differential-mode (>70dB) attenuation for industrial applications. For aerospace/defense applications, the MQPI-18 offers >45dB and >75dB common-mode and differential-mode attenuation respectively.
- Used separately or in combination, Cool-Power PI31xx converters and QuietPower EMI filters defy the power density constraints of conventional converters and filters, says Robert Gendron, Vice President, Picor Semiconductor Power Solutions, Vicor. - Together, they provide an elegant ‘two chip’ solution that makes it considerably easier to design for compact industrial, aerospace/defense, and/or demanding wide temperature applications.
