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UCS1002-2 Datasheet(PDF) 11 Page - SMSC Corporation

No. de pieza UCS1002-2
Descripción Electrónicos  Programmable USB Port Power Controller with Charger Emulation
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Fabricante Electrónico  SMSC [SMSC Corporation]
Página de inicio  http://www.smsc.com
Logo SMSC - SMSC Corporation

UCS1002-2 Datasheet(HTML) 11 Page - SMSC Corporation

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Programmable USB Port Power Controller with Charger Emulation
Datasheet
SMSC UCS1002
11
Revision 1.4 (07-16-13)
DATASHEET
dynamic thermal
management
The UCS1002 automatically adjusts port power switch limits and modes to lower internal
power dissipation when the thermal regulation temperature value is approached.
enumeration
A USB-specific term that indicates that a host is detecting and identifying USB devices.
handshake
Application of a charger emulation profile that requires a response. Two-way
communication between the UCS1002 and the portable device.
HBM
Human Body Model.
HSW
High-speed switch.
IBUS_R2MIN
Current limiter mode boundary.
ILIM
The IBUS current threshold used in current limiting. In trip mode, when ILIM is reached,
the port power switch is opened. In constant current mode, when the current exceeds ILIM,
operation continues at a reduced voltage and increased current; if VBUS voltage drops
below VBUS_MIN, the port power switch is opened.
Legacy
USB devices that require non-BC1.2 signatures be applied on the DPOUT and DMOUT
pins to enable charging.
OCL
Over-current limit.
POR
Power-on reset.
portable device
USB device attached to the USB port.
power thief
A USB device that does not follow the handshaking conventions of a BC1.2 device or
Legacy devices and draws current immediately upon receiving power (i.e., a USB book
light, portable fan, etc).
Removal Detection
A Removal Detection event occurs when the current load on the VBUS pin drops to less
than IREM_QUAL for longer than tREM_QUAL.
removal
The physical removal of a portable device from a USB port that the UCS1002 is controlling.
response
An action, usually in response to a stimulus, in charger emulation performed by the
UCS1002 device via the USB data lines.
SDP or USB-IF SDP
Standard downstream port. The combination of the UCS1002 high-speed switch being
closed with an upstream USB host present comprises a BC1.2 SDP. This enables a BC1.2
compliant portable device to simultaneously draw current up to 0.5 A while data
communication is active.
signature
Application of a charger emulation profile without waiting for a response. One-way
communication from the UCS1002 to the portable device.
Stand-alone mode
Indicates that the communications protocol is not active and all communications between
the UCS1002 and a controller are done via the external pins only (M1, M2, EM_EN,
PWR_EN, S0, and LATCH as inputs and ALERT# and A_DET# as outputs).
stimulus
An event in charger emulation detected by the UCS1002 device via the USB data lines.
Table 1.1 Terms and Abbreviations (continued)
TERM /
ABBREVIATION
DESCRIPTION


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