Datasheet Si86Px (Skyworks) - 7

link to page 8 link to page 7
DATA SHEET Si86Px 3. Functional Description 3.1. Digital Isolation
The Si86Px series can transfer digital data signals between power domains with up to 3.75 kVRMS of isolation. Additionally, Si86Px products feature a fully integrated power transfer solution, including a dc-dc converter and a miniature transformer that regulates output voltage by sensing it on the isolated side. A simplified block diagram for a single Si86Px channel is shown in Figure 11 below. The operation of an Si86Px digital channel is analogous to that of a digital buffer, except an RF carrier transmits data across the  isolation barrier. This simple architecture provides a robust isolated data path and requires no special considerations or initialization at start-up. A channel consists of an RF transmitter and RF receiver separated by a silicon dioxide capacitive isolation barrier. In the transmitter, the input signal modulates the carrier provided by an RF oscillator using on/off keying. The receiver contains a demodulator that decodes the input state according to its RF energy content and applies the result to the output via the output driver. This RF on/off keying scheme is superior to pulse code schemes as it provides best-in-class noise immunity, low power consumption, and better immunity to magnetic fields.  See Figure 12 on page 8 for modulation scheme details. @A `DVK W a W DE @T PQR SA I [@\T ]GOL^G_ TUVW HGK ME ]GOL^G_ `Da DE DOVD d U_E DGLÿ U_f g [@\T `Da DE DOVD @SSYTZ @ BCDE FGH BCDE FGH @SSYTZ `Pj ICJK LMNO ICJK LMNO \MGLÿ LJF_ A`Pj 23 @ "6 # 67 `Pj XMF_GE GK ME TUVW HGK ME XB`\ XMOK E MH A UM`h A UMBh 3 2 9 9! 9 7 9 9 "6# 67 66 & !7 69ÿ !( ) "6# 67 6 TUVW HGK ME bQSA d U_E DGLÿ U_f g bQS 2 AUMHGKWMO 4567 89 4567 8 5 5 `j TUVW HGK ME G_GVWKWmD X 9 7 7 3 "* 3 4* l kMLJH GK ME SDFMLJH GK ME ] $3 3 9 ", 9 7 bQSc 9!9 .6 bQSi + 9 7 68 9 7
Figure 11. Si86Px Power and Signal Isolation Block Diagram
Skyworks Solutions, Inc. • Phone [949] 231-3000 • sales@skyworksinc.com • www.skyworksinc.com 207353A • Skyworks Proprietary Information • Products and Product Information are Subject to Change without Notice 7 March 23, 2026 Document Outline Applications Features Safety Regulatory Approvals (Pending) Description 1. Functional Block Diagrams 2. Pin Descriptions 2.1. WB SOIC-16 2.2. WB SOIC-20 3. Functional Description 3.1. Digital Isolation 3.2. Power Isolation 3.2.1. DC-to-AC Conversion 3.2.2. AC-to-AC Conversion 3.2.3. AC-to-DC Conversion 4. Digital Isolator Device Operation 4.1. Logic Operation 4.2. Device Startup 4.3. Undervoltage Lockout 4.4. Thermal Protection 4.5. Fault Tolerance and Protection 4.5.1. Overload/Short Circuit Protection 4.5.2. Time-Out Block 4.5.3. Overvoltage Protection 5. Electrical Specifications 5.1. Si86P5x: 5 V Supply Input and 3.3 to 5 V Continuous Supply Output 5.2. Si86P4x: 3.3 V to 5 V Continuous Supply Input and 3.3 V Supply Output 5.3. Si86P3x: 3.3 V Supply Input and 3.3 V Supply Output 5.4. Supply Input Current Characteristics 5.5. Electrical Characteristics—Digital Isolator 5.5.1. Logic Input and Output Characteristics 5.5.2. Supply Current Characteristics 5.6. Timing Characteristics 5.7. Typical Performance Characteristics 5.8. Thermal Characteristics 5.9. Safety Certifications and Specifications (Pending) 6. Application Information 6.1. Recommended Application Circuits 6.2. Power Supply and Layout Considerations 6.3. Hysteretic Control and Programmable Output Voltage 7. Package and Handling Information 7.1. WB SOIC-16 Top Marking 7.2. WB SOIC-20 Top Marking 7.3. WB SOIC-16 Package 7.4. WB SOIC-20 Package 7.5. WB SOIC-16 Land Pattern 7.6. WB SOIC-16 Tape and Reel Information 7.7. WB SOIC-20 Land Pattern 7.8. WB SOIC-20 Tape and Reel Information 8. Ordering Information 9. Revision History