Suited to driving any kind of resistive, capacitive, or inductive load with one side connected to ground, the switches are used in programmable logic controllers, peripheral input/output ports of industrial PCs, and numerical control machines.
With a preset current limit of 0.7A in the IPS4140HQ and 1.0A in the IPS4140HQ-1, the switches also tolerate 41V maximum applied voltage to enhance system safety and reliability.
Per-channel protection and diagnostics include short-circuit protection, as well as temperature monitoring that can turn off and restart overloaded channels independently to maximise system-level fault tolerance and simplify automated recovery. In addition, case-overtemperature monitoring that shuts down the entire device restarts channels sequentially to avoid excessive peak-current demand on the power supply. A dedicated open-drain output pin for each channel provides an external indication of overtemperature status.
Further protection and diagnostic features include short-circuit protection, output-current limiting, under-voltage lockout (UVLO), ground-disconnection protection, and input-overvoltage protection. In addition, an output voltage clamp provides fast demagnetisation for inductive loads.
Made using ST’s VIPower technology, these intelligent power switches can withstand single-pulse avalanche energy (EAS) up to 2.5J single channel and I/O pins are compatible with 5V and 3.3V logic. Transient robustness meets IEC 61000-4-2 (ESD), IEC 61000-4-4 (Burst), and IEC 61000-4-5 (Surge) IEC 61000-4, and electromagnetic compatibility is compliant with IEC 61131-2 for industrial equipment.
The IPS4140HQ and IPS4140HQ-1 are available in the 8 x 6mm QFN48 package, priced from $2.59 for orders of 1,000 pieces.
Two industrial digital-output expansion cards, X-NUCLEO-DO40A1 and X-NUCLEO-DO41A1, are also available and can be used with STM32 Nucleo microcontroller boards. They are priced $41.65 each.
