Si88x4x QUAD DIGITAL ISOLATORS WITH DC-DC CONVERTER Features High-speed isolators with Highly-reliable: 100 year lifetime integrated dc-dc converter High electromagnetic immunity and Fully-integrated secondary sensing ultra-low emissions feedback-controlled converter with RoHS compliant packages dithering for low EMI SOIC-20 wide body dc-dc converter peak efficiency of SOIC-24 wide body 83% with external power switch Isolation of up to 5000 Vrms Up to 5 W isolated power with High transient immunity of external power switch 100 kV/ s (typical) Ordering Information: Options include dc-dc shutdown, AEC-Q100 qualified See page 38. frequency control, and soft start Wide temp range Standard Voltage Conversion 40 to +125 C 3/5 V to isolated 3/5 V Pin Assignments 24 V to isolated 3/5 V supported See page 33 Precise timing on digital isolators 0100 Mbps 18 ns typical prop delay Applications Industrial automation systems Inverters Hybrid electric and electric Data acquisition vehicles Motor control Isolated power supplies PLCs, distributed control systems Safety Approval (Pending) UL 1577 recognized VDE certification conformity Up to 5000 Vrms for 1 minute VDE 0884-10 CSA component notice 5A CQC certification approval approval GB4943.1 Patents pending Description The Si88xx integrates Silicon Labs proven digital isolator technology with an on-chip isolated dc-dc converter that provides regulated output voltages of 3.3 or 5.0 V (or >5 V with external components) at peak output power levels of up to 5 W. These devices provide up to four digital channels. The dc-dc converter has user-adjustable frequency for minimizing emissions, a soft-start function for safety, a shut-down option and loop compensation. The device requires only minimal passive components and a miniature transformer. The ultra-low-power digital isolation channels offer substantial data rate, propagation delay, size and reliability advantages over legacy isolation technologies. Data rates up to 100 Mbps max are supported, and all devices achieve propagation delays of only 23 ns max. Ordering options include a choice of dc-dc converter features, isolation channel configurations and a fail- safe mode. All products are certified by UL, CSA, VDE, and CQC. Preliminary Rev. 0.6 7/15 Copyright 2015 by Silicon Laboratories Si88x4x This information applies to a product under development. Its characteristics and specifications are subject to change without notice. Si88x4x TABLE OF CONTENTS Section Page 1. Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 2. Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 2.1. Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 2.2. Digital Isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19 2.3. DC-DC Converter Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 2.4. Transformer Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24 3. Digital Isolator Device Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25 3.1. Device Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25 3.2. Undervoltage Lockout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25 3.3. Layout Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25 3.4. Fail-Safe Operating Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26 3.5. Typical Performance Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27 4. Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33 5. Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38 6. Package Outline: 20-Pin Wide Body SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39 7. Land Pattern: 20-Pin SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41 8. Package Outline: 24-Pin Wide Body SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42 9. Land Pattern: 24-Pin SOIC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44 10. Top Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .45 10.1. Si88x4x Top Marking (20-Pin Wide Body SOIC) . . . . . . . . . . . . . . . . . . . . . . . . . .45 10.2. Top Marking Explanation (20-Pin Wide Body SOIC) . . . . . . . . . . . . . . . . . . . . . . .45 10.3. Si88x4x Top Marking (24-Pin Wide Body SOIC) . . . . . . . . . . . . . . . . . . . . . . . . . .46 10.4. Top Marking Explanation (24-Pin Wide Body SOIC) . . . . . . . . . . . . . . . . . . . . . . .46 Document Change List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47 Contact Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48 2 Preliminary Rev. 0.6