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STMicroelectronics has a new 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 and offers an on-resistance of 150mohm.
The VN808 has been equipped with various protection mechanisms.
It has 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.
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 undervoltage conditions.
The part also has a very low standby current requirement.
The VN808 is especially suitable for industrial applications that must conform to the IEC1131 international standard for programmable controllers.
It is offered in a PowerSO-36 package.
Pricing is US $3.50 each in quantities of 10,000 pieces.
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