Texas Instruments Evaluation Module for TPS2540 USB Charging Port Power Switch & Controller TPS2540EVM-623 TPS2540EVM-623 Datenbogen
Produktcode
TPS2540EVM-623
Description
1
Description
The TPS2540EVM-623 allows reference circuit evaluation of the TI TPS2540/40A and TPS2541/41A USB
charging port power switch and controller. TPS2540EVM-623 orderable configuration is equipped with
TPS2540RTE but the TPS2540A or TPS2541/41A may also be evaluated by replacing U1 with the
appropriate device.
charging port power switch and controller. TPS2540EVM-623 orderable configuration is equipped with
TPS2540RTE but the TPS2540A or TPS2541/41A may also be evaluated by replacing U1 with the
appropriate device.
1.1
Features
•
USB Charging Port Power Switch and Controller
•
Meets Battery Charging Specification BC1.2 for DCP and CDP
•
Meets Chinese Telecommunications Industry 2.0 Standard YD/T 1591-2009
•
Compatible With USB 2.0 and 3.0 Power Switch Requirements
•
Adjustable Current-limit, 230 mA
–
2800 mA typical
•
Fast Over-current Response
–
1.5
μ
S Typical
•
73-m
Ω
High-Side MOSFET
•
2.6-GHz Bandwidth USB 2.0 Data Switch
•
OUT Discharge Through CTLx=000 (TPS2540/40A) or DSC (TPS2541/41A)
•
Longer Detach Detection Time (TPS2540A/41A) Supporting Additional Legacy Devices
1.2
Applications
•
USB Ports/Hubs
•
Notebook PCs
1.3
Glossary of Terms
•
Charging Downstream Port (CDP)
–
Downstream port complies with the USB 2.0 definition of a host or a hub, and additionally defines a
handshake on DP/DM to identify a BC 1.1 compliant host to a BC 1.1 compliant portable device
handshake on DP/DM to identify a BC 1.1 compliant host to a BC 1.1 compliant portable device
–
BC 1.1 allows high-speed portable device to draw 900mA and low-speed or full-speed device to
draw 1500mA
draw 1500mA
–
BC 1.2 intention is to allow all devices to draw 1500mA
–
BC 1.2 corrects BC 1.1 to ensure USB Host provides 5V at
>
1500mA
•
Standard Downstream Port (SDP)
–
USB 2.0 defined port currently adopted by most USB ports
–
Portable device is allowed to draw 100mA initially and request additional current over USB
communications in 100mA steps up to a maximum of 500mA
communications in 100mA steps up to a maximum of 500mA
–
USB Host required to provide 5V at
>
500mA
–
Portable device must not draw
>
2.5mA when not USB in Suspend due to lack of USB
communication
•
Dedicated Charging Port as defined in BC 1.1
–
BC 1.1 defines a Dedicated Charging Port as a downstream port on a device that outputs power
through a USB connector, but is not capable of enumerating a downstream device.
through a USB connector, but is not capable of enumerating a downstream device.
–
Wall adapter must source between 500mA and 1500mA
–
Portable Device may attempt to draw 1800mA in order to force the wall adapter into constant
current mode
current mode
–
BC 1.2 intention is to allow DCP to current limit
>
1800mA to allow IC power switch device
•
YD/T 1591-2006, updated 2009
–
PROC Telecommunications Standard
–
Defines wall-adapter requirements
–
Rated current between 500mA
–
1500mA w/ defined I-V curve
2
TPS2540EVM-623: Evaluation Module for TPS2540/40A and TPS2541/41A
SLVU401B
–
September 2010
–
Revised August 2011
Copyright
©
2010
–
2011, Texas Instruments Incorporated