Power switch offers smart overload control
Joining ST’s lineup of safety switches, the IPS1050LQ is a low-side switch featuring smart overload protection with configurable inrush and current limits. Three pins allow selection between static and dynamic modes and set the operating current limit. In dynamic mode, connecting a capacitor enables an initial inrush of up to 25 A, which then steps down in stages to the programmed limit.
The output stage of the IPS1050LQ supports up to 65 V, making it suitable for industrial equipment such as PLCs and CNC machines. Its typical on-resistance of just 25 mΩ ensures energy-efficient switching for resistive, capacitive, or inductive loads, with active clamping enabling fast demagnetization of inductive loads at turn-off. Comprehensive safety features include undervoltage, overvoltage, overload, short-circuit, ground disconnection, VCC disconnection, and an overtemperature indicator pin that provides thermal protection.
Now in production, the IPS1050LQ in a 6×6-mm QFN32L package starts at $2.19 each in 1000-unit quantities.
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