SI8231BD-D-ISR

Isolators - Gate Drivers Overview

The SI8231BD-D-ISR is a galvanically isolated gate driver from the Si823x series, manufactured by Skyworks Solutions Inc. It features two independent drivers with high-speed propagation characteristics. The device supports a supply voltage range of 4.5 V to 24 V and delivers a peak output current of 500 mA. It provides 5 kVRMS isolation voltage compliant with UL1577 standards. Key electrical parameters include a maximum propagation delay of 60 ns, rise and fall times of 20 ns, and a switching frequency capability up to 8 MHz. The component operates within a temperature range of -40°C to +125°C and is housed in a 16-SOIC package.

Isolators - Gate Drivers Feature Summary

• Utilizes silicon-based capacitive coupling technology for robust galvanic isolation between input and output circuits.
• Features high electromagnetic immunity (EMI) and significant common-mode transient rejection capabilities.
• Includes integrated protection mechanisms such as under-voltage lockout (UVLO) and programmable dead-time control.

Isolators - Gate Drivers Applications

• Motor drive and control systems
• Industrial power management applications
• Lighting control circuits

Isolators - Gate Drivers Procurement Notes

Verify the specific suffix 'R' indicates tape-and-reel packaging configuration during procurement. Confirm that the AEC-Q100 qualification status aligns with automotive or industrial reliability requirements. Ensure the SOIC-16 footprint matches the target PCB design constraints. Validate that the 500 mA output current meets the gate charge demands of the intended MOSFET or IGBT load.

Isolators - Gate Drivers Selection Notes

Select this component when high-speed switching with reliable isolation is required for half-bridge configurations. The 500 mA drive strength suits medium-power devices, while the 5 kVRMS rating ensures safety in high-voltage environments. Consider the 60 ns propagation delay for timing-sensitive applications. The wide operating temperature range supports harsh industrial conditions.

Isolators - Gate Drivers Part Context

This part belongs to the Si823x family of isolated gate drivers, which are designed to replace traditional transformer-based solutions. The series offers compact size and low propagation delay, making it suitable for modern power electronics. The manufacturer transitioned from Silicon Laboratories to Skyworks Solutions, maintaining the same core technology and pinout compatibility.

Isolators - Gate Drivers Replacement Considerations

Direct substitutes within the same family include SI8231AD-D-ISR and SI8231BD-D-IS. Verify that alternative parts match the 500 mA output current and 5 kVRMS isolation rating. Check if the replacement package variant (tube vs. reel) requires handling adjustments.

Isolators - Gate Drivers FAQ

What is the isolation voltage rating of the SI8231BD-D-ISR?

The device provides an isolation voltage of 5 kVRMS, which is certified under UL1577 standards.

Does the SI8231BD-D-ISR support TTL logic inputs?

Yes, the driver features TTL-compatible inputs with hysteresis greater than 400 mV for noise immunity.