TPS2540A USB Charging Port Controller and 2.5A Power Switch | TI.com

TPS2540A
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USB Charging Port Controller and 2.5A Power Switch

 

Description

The TPS2540/40A and TPS2541/41A are a combination of current-limited USB port power switch with a USB 2.0 high-speed data line (D+/D-) switch and a USB charging port identification circuit. Applications include notebook PCs and other intelligent USB host devices. The wide bandwidth (2.6 GHz) data-line switch also features low capacitance and low on resistance, allowing signals to pass with minimum edge and phase distortion. The TPS2540/40A/41/41A monitors D+ and D-, providing the correct hand-shaking protocol with compliant client devices.

The TPS2540/40A/41/41A supports the following charging logic schemes:

  • USB 2.0 BC1.2
  • Chinese Telecom Standard YD/T 1591-2009
  • Divider Mode, compliant with Apple devices such as iPod and iPhone

CTL1-CTL3 logic inputs are used to select one of the various charge modes provided by the TPS2540/40A and TPS2541/41A . These charge modes allow the host device to actively select between Dedicated Charging Port (DCP) (wall-adapter emulation), Charging Downstream Port (CDP) (active USB 2.0 data communications with 1.5-A support), or Standard Downstream Port (SDP) USB 2.0 Mode (active USB 2.0 data communications with 500-mA support). The TPS2540/40A/41/41A also integrates an auto-detect feature that supports both DCP schemes for Battery Charging Specification (BC1.2) and the Divider Mode without the need for outside user interaction.

The TPS2540A auto detect mode also has a longer detach detection time, so that it can support certain unique non-compliant devices. The TPS2540/40A/41/41A power-distribution switch is intended for applications where heavy capacitive loads and short-circuits are likely to be encountered, incorporating a 73-mΩ, N-channel MOSFET in a single package. Constant-current mode is used when the output load exceeds the current-limit threshold. ILIM_SEL logic input selects one of two current-limit thresholds, each one being individually adjustable via an external resistor. Additional USB switch features include a de-glitched output fault reporting (FAULT), and a logic-level enable EN (TPS2540/40A) or OUT discharge control DSC (TPS2541). With the TPS2540/40A, the mode “000” is used to force an output discharge.

Features

  • Meets Battery Charging Specification BC1.2 for DCP and CDP
  • Meets Chinese Telecommunications Industry Standard YD/T 1591-2009
  • Supports Sleep-Mode Charging for Most Available Apple Devices and/or BC1.2 Compliant Devices
  • Compatible With USB 2.0 and 3.0 Power Switch Requirements
  • 2.6-GHz Bandwidth USB 2.0 Data Switch
  • 73-mΩ (typ.) High-Side MOSFET
  • Adjustable Current Limit up to 2.8 A (typical)
  • OUT Discharge Through CTLx=000 (TPS2540/40A) or DSC (TPS2541/41A) Input
  • Longer Detach Detection Time (TPS2540A/41A) Supporting Additional Legacy Devices
  • Available in 16-Pin QFN Package

Parametrics

Compare all products in USB power switches & charging port controllers Email Download to Excel
Part number Order Vin (Min) (V) Vin (Max) (V) Continuous current (Max) (A) Current limit (A) Enable Number of switches Rating
TPS2540A Order now 4.5     5.5     2.5     0.25 to 2.7     Active High     1     Catalog    
TPS2543 Order now 4.5     5.5     2.5     0.25 to 2.7     Active High     1     Catalog    
TPS2544 Order now 4.5     5.5     2.5     0.2 to 2.7     Active High     1     Catalog    
TPS2546 Order now 4.5     5.5     2.7     0.2 to 2.5     Active High     1     Catalog    
TPS2547 Order now 4.5     5.5     3     0.2 to 3.0     Active High     1     Catalog    
TPS2549 Order now 4.5     6.5     3     0.25 to 3.4     Active High     1     Catalog