USB Charging Port Power Switch & Controller for Charging Host Ports & Dedicated Charging Ports - TPS2540

TPS2540 (ACTIVE)

USB Charging Port Power Switch & Controller for Charging Host Ports & Dedicated Charging Ports

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

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Parametrics Compare all products in USB Charging Port Controllers

 
Vin (Min) (V)
Vin (Max) (V)
Number of Switches
Continuous Current (Max) (A)
Current Limit Accuracy @ 1A
Enable
Current Limit (A)
rDS(on) per FET (Typ) (mOhms)
Current Limit Topology
Rating
Operating Temperature Range (C)
Pin/Package
Approx. Price (US$)
TPS2540 TPS2540A
4.5     4.5    
5.5     5.5    
1     1    
2.5     2.5    
±10%     ±10%    
Active High     Active High    
0.25 to 2.7     0.25 to 2.7    
75     75    
Constant-Current     Constant-Current    
Catalog     Catalog    
-40 to 85     -40 to 85    
16WQFN     16WQFN    
0.72 | 1ku     0.72 | 1ku    

Companion parts

Part # Name Product Family Comments
TPD4E1U06   Quad Channel High Speed ESD Protection Device   ESD/EMI Protection - ESD Solution    The TPD4E1U06 is a companion device that provides 4-channels of +/-15-kV ESD protection for the USB interface  
TPD2E001   Low-Capacitance 2-Channel +/-15 kV ESD-Protection Array for High-Speed Data Interfaces   ESD/EMI Protection - ESD Solution    The TPD2E001 is a companion device that provides 2-channels of +/-15-kV ESD protection for the USB interface  
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