Dual high-side switches allow two programmable current limit values
Flexibility for driving capacitive loads is increased with the latest high-side switches from STMicroelectronics. The IPS2050H and the IPS2050H-32 permit two programmable current limit values for smart driving of capacitive loads that draw high start up current, said the company.
The dual-channel switches have an input voltage range from 8.0 to 60V and can withstand up to 65V on the input pin. According to STMicroelectronics, this ensures flexibility and robust performance in industrial applications. The integrated power MOSFET has low Rds(on), resulting in high energy efficiency and low thermal dissipation. MOSFET single-pulse avalanche energy greater than 1J at 2A boosts reliability for handling inductive loads and there is also an active clamp for fast demagnetisation.
The IPS2050H allows the main current limit to be programmed up to 2.5A for driving loads controlled by a PLC module and for use in equipment such as factory automation I/O peripherals, CNC (computer numerical control) machines and general driving of resistive, inductive and capacitive loads. The IPS2050H-32 has a higher maximum current limit of 5.7A for use with uni-directional motors in equipment such as vending machines. The current-activation threshold and limit values are configurable using external resistors. An external capacitor sets the duration of the start up current limit for smart driving of capacitive loads.
Safety features include under-voltage lock-out (UVLO) and protection against overvoltage, over-load, short-circuit, ground disconnection, and Vcc disconnection. Individual fault signalling for each channel indicates over-load and junction over-temperature events. An additional sensor is provided for case over-temperature protection.
The switches meet IEC 61000-4-2 ESD, IEC 61000-4-4, and IEC 61000-4-5 specifications for ESD, fast-transient, and surge immunity.
Demonstration boards and software are available to help quickly evaluate the driving and diagnostic capabilities when connected to industrial loads. The boards include X-Nucleo-OUT03A1 and X-Nucleo-OUT04A1 digital output expansion boards for use with STM32 Nucleo development boards, with associated X-Cube-OUT3, STSW-OUT03F4, and STSW-OUT03G4 software drivers. The company’s STSW-IFAPGUI GUI (graphical user interface) source code helps users realise an entire industrial automation environment, added ST.
The IPS2050H and the IPS2050H-32 are housed in the compact and space-efficient PowerSSO-24 package and are available now.
