Si8751/52 Data Sheet Isolated FET Driver with Pin Control or Diode Emulator Inputs KEY FEATURES The Si875x enables new pathways to the creation of custom Solid State Relay (SSR) configurations. The Si875x integrates robust isolation technology with an SSR FET driver. A Drives user-selected external FETs floating secondary side dc power supply is unnecessary as the product generates its own Choice of digital input control (Si8751) self-contained gate drive output voltage. When combined with a customer-selected external or diode emulation control (Si8752) FET, a complete Solid State Relay is formed, allowing customers to optimize their system Internally generated secondary side for cost, PCB area, power, On-Resistance, and thermal performance. power supply 10 V output with 1 mA input current Customers have a choice of digital input control (Si8751) or diode emulation control As fast as 82 s turn-on time and 46 (Si8752) to best suit their application. The Si875x integrates versatile outputs that support us turn-off time driving AC or DC load configurations. Active Miller Clamp to prevent unintended turn-on and reduce The Si875x eliminates the need for bulky mechanical relays which can be difficult to assem- inductive chatter ble onto PCBs and add switching noise to the system. Supports AC or DC load switching Traditional SSRs integrate optocoupler-style LED inputs, which limit the operating tempera- 2.5 KVrms isolation rating ture range of the solution. The Si875x experiences no such limitation and can support full UL, CSA, VDE, and CQC certifications industrial and automotive temperature ranges with increased stability and longer life. AEC-Q100 qualified The Si875x drives FET gates with a nominal 10 V using as little as 1 mA input current. Industrial 40 to 105 C or Automotive Increasing the input current to 10 mA enables turn-on times as fast as 94 s. Input side 40 to 125 C temperature ranges voltages on the Si8751 are flexible from 2.25 V to 5.5 V supporting seamless connection ROHS-compliant SOIC-8 Package to low-power controllers. The Si875x devices provide an Active Miller Clamp to prevent the unintended turn-on of the external FET when a high dV/dt is present on the FETs drain. APPLICATIONS The Si875x is qualified to the AEC-Q100 standard, making it suitable for automotive applica- Motor Controls tions. Further, its 2.5 KVrms isolation rating forms the basis for full certification to UL, CSA, Valve Controls VDE, and CQC. HVAC Relays Applications include mechanical relay, photo switch, or SSR replacement in motor control, HEV/EV Automotive Charging valve control, HVAC relay, automotive, charging, battery monitoring, ac mains line switching, Battery Monitoring and more. AC Mains Line Switching The Si8751 and Si8752 come in ROHS-compliant SOIC-8 packaging, providing a compact, industry-standard footprint and generous margin to creepage and clearance requirements. Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 1 Rev. 1.0 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice July 26, 2021 1Si8751/52 Data Sheet Ordering Guide 1. Ordering Guide Table 1.1. Si8751/2 Ordering Guide 1, Input Support Package Temperature Range (Ambient) Isolation Rating (kVrms) Ordering Part Number 2 Si8751AB-IS Digital CMOS SOIC-8 40 to 105 C Industrial 2.5 kV Digital CMOS SOIC-8 40 to 125 C Automotive 2.5 kV Si8751AB-AS Si8752AB-IS Diode Emulation SOIC-8 40 to 105 C Industrial 2.5 kV Diode Emulation SOIC-8 40 to 125 C Automotive 2.5 kV Si8752AB-AS Note: 1.S andS are used interchangeably. 2. Add an R at the end of the device to denote tape and reel option Skyworks Solutions, Inc. Phone 781 376-3000 Fax 781 376-3100 sales skyworksinc.com www.skyworksinc.com 2 Rev. 1.0 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice July 26, 2021 2