SI88621ED-ASR

Overview

The SI88621ED-ASR is a dual-channel digital isolator with an integrated isolated DC-DC converter, manufactured by Skyworks Solutions. It provides up to 5000 Vrms isolation and supports data rates up to 100 Mbps. The device features two unidirectional digital channels with a typical propagation delay of 18 ns. The integrated DC-DC converter offers user-adjustable frequency, soft-start functionality, and shutdown options, delivering regulated output voltages of 3.3 V or 5.0 V (or >5 V with external components) at peak power levels up to 5 W. It operates within a temperature range of -40°C to +125°C and is AEC-Q100 qualified for automotive applications.

Feature Summary

• Integrates high-speed digital isolation with an on-chip isolated DC-DC converter
• Provides fully-integrated secondary sensing feedback controlled converter with dithering for low EMI
• Features user-adjustable switching frequency, soft-start function, and shutdown option
• Supports standard voltage conversions including 3/5 V to isolated 3/5 V and 24 V to isolated 3/5 V

Applications

• Industrial automation systems
• Hybrid electric and electric vehicles
• Isolated power supplies
• Motor control
• PLCs and distributed control systems

Procurement Notes

Verify the specific ordering suffix 'ED-ASR' against the manufacturer's official datasheet to confirm pinout configuration, package type, and regulatory approvals. Ensure compatibility with required isolation ratings and DC-DC converter features before procurement. Cross-reference part numbers with authorized distributors to avoid counterfeit components.

Selection Notes

Select this component when both digital signal isolation and isolated power generation are required in a single package. Consider the SI88621ED-ASR for designs needing up to 5000 Vrms isolation and 100 Mbps data rates. Evaluate the need for external transformer and passive components for the DC-DC converter based on input/output voltage requirements.

Part Context

The SI88621ED-ASR belongs to the Si88x2x family of dual digital isolators with integrated DC-DC converters from Skyworks Solutions. This family combines proven digital isolation technology with an on-chip isolated DC-DC converter, offering a compact solution for applications requiring both signal isolation and isolated power supply.

Replacement Considerations

Check for direct replacements within the Si88x2x family, such as SI88621BC-IS or SI88621BD-ISR, ensuring they match the required isolation voltage, data rate, and package type. Verify that any substitute part has equivalent DC-DC converter capabilities and meets the same automotive qualification standards if applicable.