Quad Low-Side Switch Delivers Smart Automation Diagnostics

By  | May 24, 2018 | Filed under: Float Switch, Level Sensors, Wireless Sensors

The STMicroelectronics IPS4260L quad low-side intelligent power switch boosts efficiency and reliability in industrial automation, with four 260-mΩ TYP RDS(ON) power switches and protection features in a space-efficient, thermally enhanced package. The IC can manage up to 2.4A at TAMB=85°C (0.6A per channel or 2.4A on single channel) with the possibility to set current limitation threshold by external resistor and to parallelize the channel. 

 

The rise and fall time (tr, tf < 1μs) allows a high switching frequency up to 250 kHz and makes it suitable for servo drives, motor controls, industrial-PC peripherals, programmable logic controllers (PLCs), and general low-side switching of loads connected to the positive supply. Diagnostic features include open-load detection that operates while outputs are in the off state, which prevents hazards due to failures such as wire breaks. In addition, current limiting with non-dissipative cut-off shuts down the output stage after a user-selectable period in the event of over-current. An external resistor determines the limiting period, and restart is attempted automatically.

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In order to ensure quick response even with inductive loads (such as motors), ST’s new power switch integrates a smart architecture for fast demagnetization feature based on a single external clamp diode shared between the four channels. Further diagnostic features include two common open-drain pins for indicating open-load and overload/thermal-shutdown, and four input/output open-drain pins for per channel overload/thermal-shutdown signalization.

 

The IPS4260L is in production now, in a miniaturized HTSSOP20 Thermally Enhanced Thin Shrink Small-Outline Package, priced from $1.58 each/1,000. For further information, checkout the IPS4260L datasheet.

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Quad Low-Side Switch Delivers Smart Automation Diagnostics
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