Texas Instruments TPS2511 Evaluation Module TPS2511EVM-141 TPS2511EVM-141 Hoja De Datos
Los códigos de productos
TPS2511EVM-141
TPS2511
USB-A
EN Switch
Power
Supply
+5 V
GND
GND
VBUS
D-
D+
Sense
Feedback
EVM Block Diagram
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EVM Block Diagram
Figure 1. TPS2511EVM-141 EVM Block Diagram
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Glossary of Terms
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Charging Downstream Port (CDP)
–
A downstream port that complies with the USB 2.0 definition of a host or a hub and additionally
defines a handshake on DP and DM to identify a BC 1.1 compliant host to a BC 1.1 compliant
portable device.
defines a handshake on DP and DM to identify a BC 1.1 compliant host to a BC 1.1 compliant
portable device.
–
BC 1.1 allows a high-speed portable device to draw 900 mA and a low speed or full speed device
to draw 1500 mA.
to draw 1500 mA.
–
BC 1.2 intention is to allow all devices to draw 1500 mA.
–
BC 1.2 corrects BC 1.1 to ensure USB host provides 5 V at > 1500 mA.
•
Standard Downstream Port (SDP)
–
USB 2.0 defined port currently adopted by most USB ports.
–
Portable device is allowed to draw 100 mA initially and request additional current over USB
communications in 100-mA steps up to a maximum of 500 mA.
communications in 100-mA steps up to a maximum of 500 mA.
–
USB host required to provide at least 500 mA at 5 V.
–
Portable device must draw less than 2.5 mA when in USB suspend due to the absence of USB
communications.
communications.
•
Dedicated Charging Port (DCP) 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 500 mA and 1500 mA.
–
Portable device may attempt to draw 1800 mA in order to force the wall adapter into constant-
current mode.
current mode.
–
BC 1.2 intention is to allow DCP to current limit above 1800 mA.
•
YD and T 1591-2006, updated 2009
–
PROC Telecommunications Standard .
–
Defines wall-adapter requirements.
–
Rated current between 500 mA to 1500 mA with defined I-V curve.
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SLUU945 – June 2012
TPS2511EVM-141 USB Dedicated Charging Port Controller and Power
Switch Evaluation Module
Copyright © 2012, Texas Instruments Incorporated