1FEATURES

2• 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

APPLICATIONS

• USB Ports/Hubs

• Notebook PCs

• Universal Wall Charging Adapter

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.