SI8281CD-IS

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The SI8281CD-IS is a compact and economical Isolators - Gate Drivers which allows for direct connection to the logic that controls low-side and high-side power devices. The device isolates gate-drive signals up to 1.2 kV and has a maximum sourcing current of 1.8 A. As a signal isolation solution in harsh environments, the device helps to eliminate ground loops and improve safety.

Using patented Silicon-Optic technology, the SI8281CD-IS isolates the logic side from the power side for improved system safety. It eliminates the need for additional protection components, such as opto-isolators and additional driver stages, thereby simplifying system design. Additionally, the device incorporates fault protection circuitry to protect against short-circuit, reverse current, and overvoltage, and diagnostic features.

The SI8281CD-IS is an under-voltage lockout (UVLO) device with an independent logic supply, configurable logic low, and logic high thresholds, programmable FET slew-rate control, and user-selectable push-pull or open-drain outputs. The device also has timing delays and fault outputs to provide flexible system control, while its integrated fault monitoring capability helps identify low-impedance fault protection.

The SI8281CD-IS incorporates multiple protection features, such as adjustable UVLO, over-voltage protection (OVP), short-circuit protection (SCP), and thermal shutdown (TSD). Additionally, the device offers versatile output-level control to improve performance and flexibility in the automotive and industrial power-device control markets. It has a wide operating temperature range from –40° to +125° C.

The SI8281CD-IS is suitable for a wide range of applications, including motor and HVAC control, automotive powertrain and infotainment systems, AC or DC motor control, industrial automation, and power converters. Its primary application field is in automotive environments, where it can help to improve safety and system performance. Its compact package and flexible protection features help simplify power-device control, while minimizing cost and space.

As with all Isolators - Gate Drivers, the working principle of the SI8281CD-IS is to transfer signals from one side (often called the logic or input side) to another (often called the power or output side) through a medium. This is accomplished using a device or circuitry with two channels, between which a signal is passed with minimal power loss or distortion. The device itself establishes a high-frequency communication between the two sides, with the signal on the logic side being detected and reproduced on the power side. This enables efficient control of the power Semiconductor devices, without the need for additional components.

The main advantage of the SI8281CD-IS is that it facilitates the direct connection of low-side and high-side switching devices, providing a high-impedance isolation between the two sides. This helps to eliminate ground loop and improve safety. Additionally, the device protects against damages due to short-circuit, reverse current, and overvoltage, as well as providing the user with diagnostic features for improved system control and monitoring.

In conclusion, the SI8281CD-IS is an effective Isolators - Gate Drivers solution for automotive and industrial applications, providing direct connection to the logic that controls low-side and high-side power devices. As a signal isolation solution, the device helps to eliminate ground loop and improve safety, while its integrated fault-protection and diagnostic features help to simplify system design and improve system performance.

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