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ST octal driver with built-in protection systems

Posted: 20 Dec 2004 ?? ?Print Version ?Bookmark and Share

Keywords:stmicroelectronics? st? driver? vn808?

STMicroelectronics has launched an octal high-side driver with built-in protection systems and diagnostics for use in automation and industrial process control.

The VN808 is a monolithic device designed to drive any load that has one side connected to ground. It handles 0.7A with a 45V supply, offers an RDS(ON) of 150 m?, and works with VCC/2 inputs.

The new product features an active current limiter, thermal shutdown and automatic restart circuits. If the part becomes overloaded, one channel turns off and back on automatically to maintain the junction temperature between its shutdown temperature and its reset temperature. And if this condition makes the case temperature reach its shutdown limit, the overloaded channel is turned off and will restart only when the case temperature has fallen to the case reset temperature. Channels that have not been overloaded will continue to work normally. The driver turns off if the ground pin is disconnected. Other built-in safety mechanisms include protection against shorted loads and under-voltage conditions. Additionally, the device has a low stand-by current requirement.

The VN808 is designed for use in industrial applications that must conform to the IEC 1131 international standard for programmable controllers. It is offered in a PowerSO-36 package, and is priced at $3.50 in quantities of 10,000 pieces.




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