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High Side Switches

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ST’s intelligent high-side switches provide one or more channel bipolar/MOSFET output switches to drive inductive, capacitive or resistive loads. Diagnostics for CPU feedback and extensive use of electrical protection features make these devices inherently indestructible and suitable for industrial applications. These devices operate over a wide range of voltages: from +5.5 up to +50 V.

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ISO8200B IPS with galvanic isolation
ISO8200B IPS with galvanic isolation

The first ST intelligent power switch with galvanic isolation on chip

Galvanic isolated high-side smart power switch with SPI features rich diagnostic, safety, and protection features

The galvanic isolated octal high-side smart power switch enhances diagnostics and system management by providing a 20 MHz SPI port allowing both per-channel over-temperature signalization and efficient daisy-chaining of multiple devices. A power-good output indicates the status of the process-side power supply.

The device enlarges ST’s family of galvanic isolated high-side switches, featuring maximum safety and robustness in demanding applications such as industrial PLCs, PCs, or peripherals, and numeric-control machines in conventional factory automation or Industry 4.0 smart-factory scenarios.

Galvanic isolated 8-channel high-side switch in compact QFN package

Smaller, more robust and energy-efficient controllers are the current trend for innovative industrial automation equipment. An octal integrated galvanic isolated switch, ST’s ISO8200BQ housed in a compact QFN package fulfills the safety requirements and saves the PC-board space occupied by conventional opto-electronic isolation circuitry. With very low levels of quiescent current, together with on-chip RF communication through the isolation layer, it ensures excellent levels of efficiency and immunity to electromagnetic noise and ESD in compliance with international standards.