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Si88xx Family of Opto Drivers/Eval Kit

Silicon Labs introduces its Si88xx digital isolators with integrated 2W DC-DC converter

Image of Silicon Lab's Si88xx Family of Opto Drivers/Eval KitSilicon Labs' Si88xx family of products combine high-speed digital isolators with an isolated power supply. This integrated product for signal and power isolation provides a complete isolation solution to designers. The Si88xx has up to four high-speed digital isolation channels integrated with a modified fly-back topology based DC-DC converter. The DC-DC converter works in conjunction with an external transformer to provide up to 2 W of isolated power that can be used to supply the secondary side of the Si88xx as well as other circuits on the isolated side. The converter provides a high efficiency of 78%. It includes built-in secondary sensing and feedback through the isolation barrier back to the controller to achieve excellent line and load regulation for system stability. The converter also includes safety features like soft start, thermal detection, and cycle-by-cycle current limiting.

The Si88xx evaluation kit allows customers to evaluate the performance of the Si88xx digital isolators with an integrated dc-dc converter family of products. The evaluation board has the Si88241ED-IS populated to showcase the family. It is a complete solution for using a 3 V to 5 V primary supply to deliver up to 2 W on the secondary side at 3 V to 5 V supply voltage. Convenient test points are included to measure and observe time varying currents and voltages to calculate relevant parameters like efficiency, load/line regulation, and more.

Evaluation Kit includes:

  • Si88241x based evaluation board
  • Si88241ED-IS Quad digital isolator with integrated DC-DC converter
  • UTB02581s 3 V to 5 V transformer
  • Information card to get you started

Reference Design

Video: Si88xx Isolators with On-Chip DC-DC Converter

Features Applications
  • 5 kVrms isolation
  • Integrated 2 W DC/DC with regulation
  • High reliability and safety - 100 year lifetime
  • Multi-channel, high speed - 100 Mbps signal isolation
  • Low EMI emissions and high noise immunity of 100 kV/µs
  • High efficiency DC-DC converter solution (78%)
  • Motor control
  • Medical appliance isolation
  • Isolated RD-485 and CAN transceiver designs

Si88xx Family of Opto Drivers

ImageManufacturer Part NumberDescriptionAvailable Quantity
DGTL ISO 5KV 4CH GEN PURP 20SOICSI88240ED-ISDGTL ISO 5KV 4CH GEN PURP 20SOIC0View Details
DGTL ISO 5KV 4CH GEN PURP 20SOICSI88241ED-ISDGTL ISO 5KV 4CH GEN PURP 20SOIC0View Details
DGTL ISO 5KV 4CH GEN PURP 20SOICSI88243ED-ISDGTL ISO 5KV 4CH GEN PURP 20SOIC0View Details
DGTL ISO 5KV 4CH GEN PURP 20SOICSI88244ED-ISDGTL ISO 5KV 4CH GEN PURP 20SOIC1 - ImmediateView Details
DGTL ISO 5KV 4CH GEN PURP 20SOICSI88242ED-ISDGTL ISO 5KV 4CH GEN PURP 20SOIC0View Details
DGTL ISO 5KV 4CH GEN PURP 20SOICSI88242BD-ISDGTL ISO 5KV 4CH GEN PURP 20SOIC0View Details
DGTL ISO 5KV 4CH GEN PURP 24SOICSI88640ED-ISDGTL ISO 5KV 4CH GEN PURP 24SOIC46 - ImmediateView Details
DGTL ISO 5KV 4CH GEN PURP 24SOICSI88644ED-ISDGTL ISO 5KV 4CH GEN PURP 24SOIC36 - ImmediateView Details
DGTL ISO 5KV 2CH GEN PURP 20SOICSI88621BD-ISDGTL ISO 5KV 2CH GEN PURP 20SOIC0View Details

Eval Kits

ImageManufacturer Part NumberDescriptionAvailable Quantity
EVAL BOARD SI882XX ISOLATOR PLUSSI88XXXISO-KITEVAL BOARD SI882XX ISOLATOR PLUS2 - ImmediateView Details
EVAL BOARD SI882XX ISOLATOR PLUSSI88XXXISO-KITEVAL BOARD SI882XX ISOLATOR PLUS2 - ImmediateView Details
EVALUATION KIT SI886XXSI886XXISO-KITEVALUATION KIT SI886XX2 - ImmediateView Details
Published: 2015-04-28