SLVSL35 September   2026 TUSB2514B

ADVANCE INFORMATION  

  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 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Timing Requirements
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Battery Charging Features
      2. 6.3.2 USB Power Management
      3. 6.3.3 Clock Generation
        1. 6.3.3.1 Crystal Requirements
        2. 6.3.3.2 Input Clock Requirements
      4. 6.3.4 Power-Up and Reset
    4. 6.4 Device Functional Modes
      1. 6.4.1 I2C EEPROM Operation
      2. 6.4.2 SMBus Target Operation
      3. 6.4.3 Port Configuration
  8. 7 Register Maps
    1. 7.1 TUSB2514 Registers
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Application Curves
    3. 8.3 Power Supply Recommendations
      1. 8.3.1 TUSB2514B Power Supply
      2. 8.3.2 Downstream Port Power
      3. 8.3.3 Ground
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
        1. 8.4.1.1 Placement
        2. 8.4.1.2 Package Specific
        3. 8.4.1.3 Differential Pairs
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

6.3.2 USB Power Management

The TUSB2514B can be configured for power-switched applications using either per-port (full power managed) or ganged power-enable controls and overcurrent status inputs. When battery charging is enabled, the device always operates in full power managed mode.

Power switch support is enabled via Configuration Register 1 (fullPwrMgmtz), and the per-port or ganged mode is selected using Configuration Register 1 (ganged).

The TUSB2514B supports both active-high and active-low power-on controls. The output polarity of the PWRCTLn pins is configured through Configuration Register 2 (pwrctlPol).

The TUSB2514B also features an overcurrent detection circuit, which protects from device damage due to electrical overstress that can occur from VBUS being shorted to the D+ or D- pins. When power switch support is set to per-port, this turns off VBUS to the individual downstream ports by asserting PWRCTL output to a connected VBUS power switch. The TUSB2514B also updates its internal USB Port Status register to reflect the overcurrent event, which is detected by the USB host. When power switch support is set to ganged mode, VBUS to all downstream ports will be disabled simultaneously. The timing of these events can be modified through the Additional Feature Configuration register (pwronTime).