Description

The Si830x provides four high-side or low-side

switches with low RON. These switches are ideal for

driving resistive and inductive loads like solenoids,

relays, and lamps commonly found in industrial control

systems like Programmable Logic Controllers (PLC).

They are easily interfaced directly to an MCU, or controlled

through a digital isolator or optocoupler-based

isolation barrier.

The logic interface supports low-power 2.5 V to 5 V

MCUs and is powered by the switch's high-voltage field

power supply. The field power supply supports a wide

supply range, from 9 V to 32 V, making it ideal for

industrial voltage levels. The switches are capable of

providing 0.7 A under any valid load condition. An

innovative multi-voltage clamp efficiently handles an

unlimited amount of demagnetization energy (EAS).

Each switch offers complete fault protection. A unique

power estimation based overcurrent protection keeps

the device cool and operational, even during a short

circuit event. Additionally, the device power supplies

are monitored, and the switches are safely constrained

or shutdown on faults.

Three diagnostics are reported through an active-low,

open-drain fault indicator pin (FLT). It can be connected

to an LED for instant user feedback, connected

to an MCU for advanced software control, or tied

together with additional fault pins from other devices

to simplify user feedback or reduce board layout complexity.

Applications

• Programmable logic controllers

• Industrial data acquisition

• Motion controllers

• Smart solid-state relays

Key Features

• High-side or low-side switch

• Switch Supply: 9 V–32 V

• Fast (10 μs) update rate

• High continuous current (700 mA)

and low RON (150 mΩ)

- Unique multi-voltage output clamp

- Unlimited demagnetization (EAS)

• Efficient and fast turn-OFF

• Current-limited overload protection

• Over temperature protection

• Undervoltage protection

• Three different diagnostics

- Overvoltage

- Over temperature

- Overcurrent

• Dedicated fault indicator

• Dedicated output enable input

• Designed to IEC 61131-2

• Compact TSSOP-24 package

• 3.5 kV ESD Protection

• –40 to 125 °C operating temperature