SI88621BD-IS Silicon Labs

Si88x4x Data Sheet Quad Digital Isolators with DC-DC Converter KEY FEATURES 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 High-speed isolators with integrated dc-dc converter with external components) at peak output power levels of up to 5 W. These devices pro- vide up to four digital channels. The dc-dc converter has user-adjustable frequency for Fully-integrated secondary sensing feedback-controlled converter with minimizing emissions, a soft-start function for safety, a shut-down option and loop com- dithering for low EMI pensation. The device requires only minimal passive components and a miniature trans- former. dc-dc converter peak efficiency of 83% with external power switch The ultra-low-power digital isolation channels offer substantial data rate, propagation de- Up to 5 W isolated power with external lay, size and reliability advantages over legacy isolation technologies. Data rates up to power switch 100 Mbps max are supported, and all devices achieve propagation delays of only 23 ns Options include dc-dc shutdown, frequency max. Ordering options include a choice of dc-dc converter features, isolation channel control, and soft start configurations and a failsafe mode. All products are certified by UL, CSA, VDE, and Standard Voltage Conversion CQC. 3/5 V to isolated 3/5 V 24 V to isolated 3/5 V supported Automotive Grade is available for certain part numbers. These products are built using automotive-specific flows at all steps in the manufacturing process to ensure the robust- Precise timing on digital isolators ness and low defectivity required for automotive applications. 0100 Mbps 18 ns typical prop delay Industrial Applications Automotive Applications Highly-reliable: 100 year lifetime Industrial automation systems Hybrid electric and electric vehicles High electromagnetic immunity and ultra- low emissions Medical electronics Traction inverters RoHS compliant packages Isolated switch mode supplies Battery management systems SOIC-20 wide body Inverters Vehicle communication busses SOIC-24 wide body Data Acquisition Isolation of up to 5000 V RMS Motor control High transient immunity of 100 kV/s PLCs, distributed control systems (typical) AEC-Q100 qualified Wide temp range: -40 to +125C Safety Regulatory Approvals Automotive-grade OPNs available AIAG compliant PPAP documentation UL 1577 recognized VDE certification conformity support Up to 5000 V for 1 minute VDE0884-10 RMS IMDS and CAMDS listing support CQC certification approval CSA component notice 5A approval GB4943.1 IEC 60950 silabs.com | Building a more connected world. Rev. 1.01 Table of Contents 1. Feature List................................4 2. Ordering Guide ..............................5 3. Functional Description............................8 3.1 Theory of Operation............................8 3.2 Digital Isolation .............................8 3.3 DC-DC Converter Application Information ....................9 3.3.1 Shutdown .............................9 3.3.2 Soft-Start .............................9 3.3.3 Programmable Frequency........................9 3.3.4 External Transformer Driver.......................9 3.3.5 VREGA, VREGB...........................9 3.3.6 Output Voltage Control.........................9 3.3.7 Compensation............................10 3.3.8 Thermal Protection..........................10 3.3.9 Cycle Skipping ...........................10 3.3.10 Low-Voltage Configuration.......................11 3.3.11 Low-Voltage to High-Voltage Configuration .................12 3.3.12 High-Voltage to Low-Voltage Configuration .................13 3.3.13 High-Voltage Configuration.......................14 3.4 Transformer Design............................15 4. Digital Isolator Device Operation ....................... 17 4.1 Device Startup .............................17 4.2 Undervoltage Lockout ...........................17 4.3 Layout Recommendations..........................17 4.3.1 Supply Bypass ...........................17 4.3.2 Output Pin Termination.........................18 4.4 Fail-Safe Operating Mode..........................18 4.5 Typical Performance Characteristics ......................19 5. Electrical Specifications .......................... 24 5.1 Calculating Total Current Consumption .....................37 6. Pin Descriptions ............................. 38 7. Package Outline: 20-Pin Wide Body SOIC.................... 43 8. Land Pattern: 20-Pin SOIC ......................... 45 9. Package Outline: 24-Pin Wide Body SOIC.................... 46 10. Land Pattern: 24-Pin SOIC ......................... 48 11. Top Markings.............................. 49 11.1 Si88x4x Top Marking (20-Pin Wide Body SOIC)..................49 silabs.com | Building a more connected world. Rev. 1.01 | 2