Si8281/82/83/84 Data Sheet SiC FET-Ready ISODrivers with Integrated DC-DC Converters KEY FEATURES The Si828x family (Si8281/82/83/84) is comprised of isolated, high-current gate drivers with integrated system safety and feedback functions. These devices are ideal for driving Silicon System Safety Features Carbide (SiC) FETs, power MOSFETs, and IGBTs used in a wide variety of inverter and DESAT detection motor control applications. The Si828x isolated gate drivers utilize Skyworks proprietary FAULT feedback silicon isolation technology, supporting up to 5.0 kVrms withstand voltage per UL1577. This Undervoltage Lock Out (UVLO) technology enables higher-performance, reduced variation with temperature and age, tighter including 13 and 15 V for SiC part-to-part matching, and superior common-mode rejection compared to other isolated gate FET driver technologies. Soft shutdown on fault condition Ultra-fast short circuit protection In addition to the gate driver, the Si828x family integrates a dc-dc controller for simple im- << 1 s plementation of an isolated supply for the driver side. The Si828x dc-dc controller can be Robust reference design ordered in two different configurations depending on what system voltage rails are available for current boost, DESAT and the amount of power needed. The Si8281 and Si8283 have integrated power switches adjustment, soft shutdown tuning, but are limited in dc-dc voltage input to the device bias. The Si8282 and Si8284 utilize an ex- and external Miller clamp ternal power switch and are able to accept much higher voltage input power. User-adjustable transistor frequency for minimizing emissions, a soft-start function for safety, and shut-down capability High-performance isolation are available options. The device requires only minimal passive components and a miniature technology transformer. High CMTI 125 kV/s The input to the device is a complementary digital input that can be utilized in several configu- 30 V driver-side supply voltage rations. The input side of the isolation also has several control and feedback digital signals. Integrated Miller clamp The controller to the device receives information about the driver side power state and fault Power ready pin state of the device and recovers the device from faults through an active-low reset pin. Complementary driver control input Compact packages: 20 and 24-pin On the output side, Si828x devices provide separate pull-up and pull-down pins for the gate. A wide-body SOIC dedicated DSAT pin detects a desaturation condition and immediately shuts down the driver in Integrated DC-DC converter a controlled manner using soft shutdown. The Si828x devices also integrate a Miller clamp to Feedback-controlled converter assure a strong turn-off of the power switch. with dithering for low EMI Automotive Grade is available. These products are built using automotive-specific flows at all DC-DC converter efficiency of steps in the manufacturing process to ensure the robustness and low defectivity required for 83% automotive applications. Shutdown, frequency, and soft- start controls Industrial Applications Automotive Applications Automotive-grade OPNs available SiC/IGBT/ MOSFET gate drives Hybrid electric and electric vehicles PPAP documentation support IMDS and CAMDS listing support Industrial and renewable energy inverters Traction inverters AEC-Q100 Qualified AC, Brushless, and DC motor controls On-board chargers Temp range: 40 to 125 C Variable-speed motor controllers Inductive chargers Isolated switch mode power supplies DC-DC converters Safety Regulatory Approvals UL 1577 recognized: 5000 V for 1 minute RMS CSA approval: IEC 62368-1 (reinforced insulation) VDE certification: IEC 60747-17 (basic, pending), 62368-1 (reinforced insulation) CQC certification approval: GB4943.1-2011 (reinforced insulation) Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 1 Rev. 2.1 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice October 12, 2021 1Table of Contents 1. Si8281/82/83/84 Ordering Guide ........................3 2. System Overview..............................5 2.1 Isolation Channel Description.........................5 2.2 Device Behavior .............................5 2.3 Main Features ..............................5 3. Applications Information...........................8 3.1 Recommended Application Circuits.......................8 3.1.1 Power Supply Considerations .......................9 3.1.2 Inputs ...............................10 3.1.3 Reset, RDY, and Fault..........................10 3.1.4 Desaturation .............................11 3.1.5 Driver Outputs.............................12 3.1.6 Miller Clamp .............................12 3.1.7 Additional Adjustments for the Si828x.....................12 3.2 DC-DC Converter Application Information.....................13 3.2.1 External Transformer Driver........................13 3.2.2 Output Voltage Control..........................13 3.2.3 Compensation.............................13 3.2.4 Thermal Protection...........................14 3.2.5 Cycle Skipping (Si8282 and Si8284 Only) ...................14 3.2.6 Shutdown (Si8283 and Si8284 Only).....................14 3.2.7 Soft Start (Si8283 and Si8284 Only) .....................14 3.2.8 Programmable Frequency (Si8283 and Si8284 Only) ...............14 3.2.9 Si8281/83 Converter (Internal Switch) Configuration................15 3.2.10 Si8282/84 Converter (External Switch) Configuration ...............16 3.2.11 Transformer Design ..........................17 3.3 Layout Considerations ...........................17 4. Electrical Specifications .......................... 18 4.1 Timing Diagrams .............................25 4.2 Typical Operating Characteristics........................26 4.3 Regulatory Information ...........................30 5. Pin Descriptions............................. 33 6. Packaging ............................... 37 6.1 Package Outline: 20-Pin Wide Body SOIC.....................37 6.2 Land Pattern: 20-Pin Wide Body SOIC......................39 6.3 Package Outline: 24-Pin Wide Body SOIC.....................40 6.4 Land Pattern: 24-Pin Wide Body SOIC......................42 6.5 Top Marking: 20-Pin and 24-Pin Wide Body SOIC ..................43 7. Revision History............................. 44 Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 Rev. 2.1 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice October 12, 2021 2