SLVS714B February   2007  – June 2024 TPS2062-1 , TPS2065-1 , TPS2066-1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 Recommended Operating Conditions
    3. 5.3 Thermal Information
    4. 5.4 Electrical Characteristics
    5. 5.5 Typical Characteristics
  7. 6 Parameter Measurement Information
    1.     13
  8. 7 Detailed Description
    1. 7.1  Functional Block Diagram
    2. 7.2  Power Switch
    3. 7.3  Charge Pump
    4. 7.4  Driver
    5. 7.5  Enable ( ENx or ENx)
    6. 7.6  Current Sense
    7. 7.7  Overcurrent
      1. 7.7.1 Overcurrent Conditions (TPS2062-1 and TPS2065-1)
      2. 7.7.2 Overcurrent Conditions (TPS2066-1)
    8. 7.8  Overcurrent ( OCx)
    9. 7.9  Thermal Sense
    10. 7.10 Undervoltage Lockout
    11. 7.11 Discharge Function
  9. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1  Power-Supply Considerations
      2. 8.1.2  OC Response
      3. 8.1.3  Power Dissipation and Junction Temperature
      4. 8.1.4  Thermal Protection
      5. 8.1.5  Undervoltage Lockout (UVLO)
      6. 8.1.6  Universal Serial Bus (USB) Applications
      7. 8.1.7  Host/Self-Powered and Bus-Powered Hubs
      8. 8.1.8  Low-Power Bus-Powered and High-Power Bus-Powered Functions
      9. 8.1.9  USB Power-Distribution Requirements
      10. 8.1.10 Generic Hot-Plug Applications
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
    2. 9.2 Documentation Support
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

8.1.9 USB Power-Distribution Requirements

USB can be implemented in several ways, and, regardless of the type of USB device being developed, several power-distribution features must be implemented.

  • Hosts/SPHs must:
    • Current-limit downstream ports
    • Report overcurrent conditions on USB VBUS
  • BPHs must:
    • Enable/disable power to downstream ports
    • Power up at <100 mA
    • Limit inrush current (<44 Ω and 10 μF)
  • Functions must:
    • Limit inrush currents
    • Power up at <100 mA

The feature set of the TPS206x-1 allows them to meet each of these requirements. The integrated current-limiting and overcurrent reporting is required by hosts and self-powered hubs. The logic-level enable and controlled rise times meet the need of both input and output ports on bus-powered hubs, as well as the input ports for bus-powered functions (see Figure 8-5).

TPS2062-1 TPS2065-1 TPS2066-1 Hybrid Self / Bus-Powered Hub ImplementationFigure 8-5 Hybrid Self / Bus-Powered Hub Implementation