STMicroelectronics – Single high-side switch ideal for high-safety automation systems

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The IPS160H and IPS161H from STMicroelectronics are monolithic high-side switches which can drive capacitive, resistive or inductive loads with one side connected to ground. They are intended for use in designs which must comply with the requirements of the Safety Integrity Level (SIL) specifications applied by functional safety standards.

Features of the IPS16xH parts that support functional safety compliance include extended diagnostics and embedded protection functions. A built-in thermal shut-down function protects the chip against over-temperature and short-circuit faults.

To minimise power dissipation when the output is shorted, a non-dissipative short-circuit cut-off is implemented: it limits the output average current value and this protects the device against overheating.

The IPS160H limits the current to 2.6A. In the IPS161H, the minimum output current limitation is set at 0.7A.

A common diagnostic pin reports thermal shut-down, open-load and cut-off events. The cut-off delay time may be programmed with an external capacitor.

FEATURES

  • Operating-voltage range: 8V to 60V
  • 60mΩ on-state resistance
  • Fast demagnetisation of inductive loads
  • 5mm x 4mm PowerSSO12 package

APPLICATIONS

  • Programmable logic controllers
  • Factory automation I/O peripherals
  • Computer Numerical Control (CNC) machines

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The STEVAL-IFP028V1 is an evaluation board which enables analysis of all the IPS160H’s functions. It provides galvanic isolation between the user interface and the power interface through two optocouplers for forward signals to the device and for diagnostic feedback signals.

Orderable Part Number: STEVAL-IFP028V1