FUSB251 Type-C™ CC and SBU Protection IC

ON Semiconductor's FUSB251 closes both CC and SBU switches with a valid VDD supply after Power-On reset

Image of ON Semiconductor's FUSB251 Type-C™ CC and SBU Protection ICON Semiconductor's FUSB251 is an I2C controlled overvoltage protection switch on CC and SBU pins in a Type-C interface port. The device has SPST switches on CC1/2 and SBU1/2 which are enabled automatically with valid VDD so that a Type-C PD controller can use the overvoltage protected CC path. The FUSB251 has dead battery mode and CC pulled down with Rd so the source device can provide VBUS for battery charging. Another feature of the FUSB251 is moisture detection on both the CC and SBU paths with ADC detection. Once moisture is detected, an interrupt is generated and the corresponding register is updated to notify the host. The device has on-chip IEC protection with surge protection on both CC and SBU paths. Both CC and SBU ports are 20 VDC tolerant.

  • Low ron SPST switches on both CC1/2 and SBU1/2 Path for USB Type-C
  • Dead battery mode provides default Rd presenting on CC1/2
  • ±35 V surge protection on CC and SBU
  • Overvoltage protection on CC and SBU
  • I2C interface with processor with interrupt for event notification
  • 24 VDC tolerant on CC and SBU
  • Moisture detection on CC and SBU pins
  • On-chip IEC ESD protection with external capacitor on CAP pin
  • CC ron 0.3 Ω typical
  • SBU ron 3 Ω typical
  • 50 MHz bandwidth on SBU switch
End products
  • Smartphones
  • Tablets, netbooks, and ultra-mobile PCs
  • Gaming devices and e-books
  • Portable devices with Li-ion battery
  • Car cigarette jacks
  • External USB storage

FUSB251 Type-C™ CC and SBU Protection IC

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Published: 2019-08-16