TPS2549 USB Charging Port Controllers and Power Switches

Texas Instruments offers its TPS2549 USB charging port controllers and power switches with cable compensation

Image of Texas Instruments' TPS2549 USB Charging Port Controllers and Power SwitchesTexas Instruments' TPS2549 device is a USB charging port controller and power switch with a current-sense output that is able to control an upstream supply. This allows it to maintain 5 V at the USB port even with heavy charging currents. This is important in systems with long USB cables where significant voltage drops can occur while fast-charging portable devices.

The TP2549 47 mΩ power switch has two selectable, programmable current limits that support port power management by providing a lower current limit that can be used when adjacent ports are experiencing heavy loads. This is important in systems with multiple ports and an upstream supply unable to provide full current to all ports simultaneously.

The DCP_Auto scheme detects and selects the proper D+ and D- settings to communicate with the attached device, so that it can fast-charge at full current. The integrated CDP detection enables up to 1.5 A fast charging of most portable devices with simultaneous data communication.

The unique client-mode feature allows software updates to client devices, but avoids power conflicts by turning off the internal power switch while keeping the data line connection.

Additionally, the TPS2549 device integrates short-to-VBUS protection for D+ and D- to prevent damage when D+ and/or D- unexpectedly short to VBUS. To save space in the application, the TPS2549 device also integrates ESD protection to pass IEC61000-4-2 without external circuitry on D+ and D-.

Features
  • 4.5 V to 6.5 V operating range
  • 47 mΩ (typical) high-side MOSFET
  • 3 A maximum continuous output current
  • ±5% CS output for cable compensation
  • Automatic DCP modes selection:
    • Shorted mode per BC1.2 and YD/T 1591-2009
    • 2.7 V divider 3 mode
    • 1.2 V mode
  • CDP mode per USB battery charging specification 1.2
  • D+ and D- client mode for system update
  • D+ and D- short-to-VBUS protection
  • D+ and D- ±8 kV contact and ±15 kV air discharge ESD rating (IEC 61000-4-2)
  • UL recognition and CB certification pending
  • -40°C to ±125°C junction operating temperature
  • 16-pin QFN (3 mm x 3 mm) package

TPS2549 USB Charging Port Controllers and Power Switches

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
IC PWR SWITCH N-CHAN 1:1 16WQFNTPS2549RTETIC PWR SWITCH N-CHAN 1:1 16WQFN0View Details
IC PWR SWITCH N-CHAN 1:1 16WQFNTPS2549IRTETQ1IC PWR SWITCH N-CHAN 1:1 16WQFN0View Details
IC PWR SWITCH N-CHAN 1:1 20WQFNTPS254900IRVCRQ1IC PWR SWITCH N-CHAN 1:1 20WQFN0View Details
Published: 2017-01-11