Diodes Incorporated
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USB Port Protection with Charger Detection


PI3USB9281C provides external detection for any USB-device. The part can detect various chargers available in the market, MHL accessories, OTG accessories, and car-chargers per the CEA936 spec. It also integrates a power switch with over-voltage and over-current protections. The VBUSIN input pin can tolerate voltages up to 28V, which is important for USB3.0-PowerDelivery enabled ports. The new USB-3.0-PowerDelivery specification supports voltages up to 20V. The PI3USB9281C can operate over a temperature range of -40°C to +85°C. Typical applications involve portable & consumer applications, such as tablet, smart phones, digital cameras, and notebooks with integrated Li-ion batteries that charge via USB connectors.


  • USB-device charger detector
  • Can tolerate USB3.0-PD with VBUS = 20V
  • USB Charging-type detection
  • Battery Charging 1.2 (BC1.2) – DCP
  • Battery Charging 1.2 (BC1.2) – CDP
  • Battery Charging 1.2 (BC1.2) – SDP
  • Apple 1A, 2A & 2.4A dedicated chargers
  • Samsung-Fast chargers
  • YD/T-1951 dedicated chargers
  • CEA-936 Carkit#1 and #2 chargers
  • Integrated Power FET
  • VBUS Tolerance up to 28V
  • 1.7A Over-Current Protection (OCP)
  • VBUS Over-Voltage Protection (OVP)
  • Non-charging Accessory Detection
  • USB On-The-Go (OTG) detection
  • Mobile HDMI Link (MHL) device detection
  • Wide Supply Voltage Range 3V to 5.5V
  • I²C Programmability
  • Small Package:
    - CSP 1.5x2.0-15L
    - UQFN 3x4x0.5mm 20L

Product Specifications

Product Parameters

Compliance(Only Automotive supports PPAP) Standard
Analog or Digital? Analog
Configuration N/A
Differential Channels 1
HotInsertion 0
Lanes N/A
OtherFeatures N/A
RailToRail 0
Signal Type Differential and Single Ended
Single Ended Channels 1
Voltage 3.3, 5

Related Content




Technical Documents

Application Information

Recommended Soldering Techniques


Additional Technical Documents are available upon request: 
Application information, Evaluation board, and Other technical documents

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Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2554 2021-11-15 2022-02-15 Qualified Additional Assembly & Test (A/T) Sites, Bill of Material (BOM) and updated Data Sheets for Package Outline
Dimension Change
PCN-2417 2019-04-24 2019-07-24 Additional Qualified (A/T) Assembly/Test Site


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