Linear Current Limit Thermal Shutdown Short Circuit Protection Integrated Fixture Low Current Drawn From Input Pins Diagnostic Feedback Through Input Pins
ESD protection goes directly to the gate of the power mosfet (analog drive)
Compatible with standard power mosfet description
The vnb14nv04, vnd14nv04, vnd14nv04-1 and vns14nv04 are monolithic devices fabricated using stmicroelectronics vipower 8482 ;m0 technology to replace standard power mosfets in DC to 50 kHz applications. Built-in thermal shutdown, linear current limit and overvoltage clamp protect the chip in harsh environments.
Fault feedback can be detected by monitoring the voltage at the input pins.

block diagram

Electrical Specifications Current and Voltage Conventions

Protection Features During normal operation, the input pins are electrically connected to the gate of the internal power mosfet through a low impedance path.
The device then behaves like a standard power mosfet and can be used as a switch from dc to 50khz. From the user's point of view, the only difference is that a small DC current IISS ( 100 microamps typical) flows into the input pins in order to power the internal circuits.
The unit integrates: Overvoltage clamp protection: Internally set to 45 V, coupled with the robust avalanche characteristics of the power mosfet level, this unit has unmatched robustness and energy handling capabilities. This characteristic is very important when driving inductive loads. Linear Current Limiter Circuit: Limits the drain current ID to ILIM regardless of the input pin voltage. When the current limiter is activated, the device operates in the linear region, so the power dissipation may exceed the capacity of the heat sink. Both the junction and case temperatures will increase, and if the phase persists long enough, the junction temperature may reach the overtemperature threshold TJSH. Over temperature and short circuit protection: They are based on sensing chip temperature and are not dependent on input voltage. The placement of on-chip sensing elements in the power stage region ensures fast and accurate detection of junction temperature. Over-temperature shutdown occurs in the range of 150 to 190°C, with a typical value of 170°C. The device restarts automatically when the chip temperature drops to about 15°C below the shutdown temperature. Status Feedback: In an overtemperature fault condition (TJ>TJSH), the device attempts to sink the diagnostic current IGF through the input pin to indicate a fault condition. If driven by a low impedance source, this current can be used to warn the control circuitry to shut down the device. If the drive impedance is high enough that the input pin driver cannot supply the current IGF, the input pin will drop to 0 V. But this does not affect device operation: other than being able to provide normal operating drive current IISS.
The device also features ESD protection based on the Human Body Model and the ability to drive from TTL logic circuits.

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