Product category:
Power Supply ICs and Controllers
News Release from: STMicroelectronics | Subject: VNI4140K
Edited by the Electronicstalk Editorial
Team on 29 November 2007
Intelligent power switch cuts its losses
Quad high-side intelligent power switch achieves a 50% saving in on-resistance compared with earlier devices with the same die size.
STMicroelectronics has a new quad high-side intelligent power switch (IPS) - the VNI4140K - which is produced using the latest generation of ST's VIPower technology to achieve a 50% saving in on-resistance compared with earlier devices with the same die size The dramatic reduction in on-resistance and quiescent current saves energy through lower losses, with device power consumption lower than any competitive product, and achieved at lower cost
This article was originally published on Electronicstalk on 8 Nov 2004 at 8.00am (UK)
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Power consumption is cut by 40% compared with earlier generation VIPower devices.
Additionally, optimising the trade-off between on-resistance and die size allows the VNI4140K to be produced in a compact PowerSSO24 package, saving space in the application compared with competitive four-channel devices.
IPS devices integrate a logic interface, drivers and protection circuits on the same chip as a power stage, to simplify system design and save space in high-power industrial applications such as programmable logic controllers (PLCs), NC (numerical control) machines, robotics and building automation systems.
ST's intelligent power switches include a broad range of current and thermal protection features, with per-channel diagnostic bits and double thermal protection being new additions in the VNI4140K.
In addition to overtemperature protection for safe operation when current draw is too high, the switch's case overtemperature protection independently limits the PCB temperature.
Channels restart independently after a case thermal shutdown, to limit the peak current.
The VNI4140K provides short-circuit and overcurrent protection, undervoltage shutdown, fast demagnetisation for safe operation with large inductive loads, and protection against loss of ground.
Diagnostic outputs are open drain to enable wired-OR configuration with other devices, and the logic inputs are 3.3V CMOS/TTL compatible.
The switch conforms fully to the IEC61131-2 standard for programmable logic devices.
Engineering samples of the VNI4140K, in the PowerSSO24 package, are available now, with volume production planned for January 2008.
It is priced at US $1.80 in quantities of 10,000 pieces.
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