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PDF UCS1002-1 Data sheet ( Hoja de datos )

Número de pieza UCS1002-1
Descripción Programmable USB Port Power Controller
Fabricantes SMSC Corporation 
Logotipo SMSC Corporation Logotipo



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UCS1002-1
Programmable USB Port Power Controller
with Charger Emulation
PRODUCT FEATURES
Datasheet
General Description
The UCS1002 provides a USB port power switch for
precise control of up to 2.5 amperes continuous current
with over-current limit (OCL), dynamic thermal
management, latch or auto-recovery (low test current)
fault handling, selectable active low or high enable,
under- and over-voltage lockout, back-drive protection,
and back-voltage protection.
Split supply support for VS and VDD is an option for low
power in system standby states. This gives battery
operated applications, like notebook PCs, the ability to
detect attachments from a sleep or off state. After the
Attach Detection is flagged, the system can decide to
wake up and/or provide charging.
In addition to power switching and current limiting
modes, the UCS1002 will automatically charge a wide
variety of portable devices, including USB-IF BC1.2,
YD/T-1591 (2009), most Apple® and RIM®, and many
others. Nine preloaded charger emulation profiles
maximize compatibility coverage of peripheral devices.
As well, a customizable charger emulation profile is
available to accommodate unique existing and future
portable device handshaking / signature requirements.
This custom profile uses a unique stimulus and
response method referenced below.*
The UCS1002 also provides current monitoring to allow
intelligent management of system power and a Battery
Full option for controlled delivery of current regardless
of the host power state. This is especially important for
battery operated applications that want to provide power
in a standby and/or off state but do not want to drain the
battery excessively.
The UCS1002 is available in a 20-pin QFN 4 mm x
4 mm package.
Applications
Notebook and Netbook Computers
Tablets and E-book readers
Desktops and Monitors
Docking Stations and Printers
AC-DC wall adapters
Features
Port power switch with two current limit behaviors
— 2.9 V to 5.5 V source voltage range
— Up to 2.5 A current with 55 mΩ On Resistance
— Over-current trip or constant current limiting
— Soft turn-on circuitry
— Programmable current limit
— Dynamic thermal management
— Under- and over-voltage lockout
— Back-drive, back-voltage protection
— Latch or auto-recovery (low test current) fault handling
— Selectable active high or low power switch enable
— BC1.2 VBUS discharge port renegotiation function
Selectable / automatic cycling of USB data line
charger emulation profiles
— Customizable emulation profile uses a unique stimulus
and response method useful for future profiles*
— Supports charger emulation
— Allows for active cables
— USB-IF BC1.2 charging downstream port (CDP) &
dedicated charging port (DCP) modes, YD/T-1591, and
most Apple and RIM protocols standard; others as
defined via the SMBus 2.0 / I2C®
— USB 2.0 compliant high-speed data switch (in Pass-
through and CDP modes)
— Nine preloaded charger emulation profiles for maximum
compatibility coverage of peripheral devices
— One custom programmable charger emulation profile
for portable device support for fully host controlled
charger emulation
Fault Alert open-drain output
Self-contained current monitoring
Low power Attach Detection and open-drain A_DET#
pin
Ultra low power Sleep state
Optional split supply support for VBUS and VDD for
low power in system standby states
Wake on Attach USB
SMBus 2.0 / I2C communications
— Supports Block Write and Read
— Multiple SMBus addresses
Wide operating temperature range: -40 °C to +85 °C
IEC61000-4-2 8 / 15 kV ESD immunity
UL recognized and EN/IEC 60950-1 (CB) certified
* Unique technology covered under the following US patents pending: 13/109,446; 13/149,529; 13/173,287; 13/233,949; 13/157,282;
12/978,371; 13/232,965.
SMSC UCS1002
DATASHEET
Revision 1.4 (07-16-13)

1 page




UCS1002-1 pdf
Programmable USB Port Power Controller with Charger Emulation
Datasheet
Chapter 7 USB Port Power Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.1 USB Port Power Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.2 Current Limiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.2.1 Current Limit Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.2.2 Short Circuit Output Current Limiting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.2.3 Soft Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.2.4 Current Limiting Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.3 Thermal Management and Voltage Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
7.3.1 Thermal Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
7.4 VBUS Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
7.5 Battery Full . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
7.5.1 Charge Rationing Interactions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
7.6 Fault Handling Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
7.6.1 Auto-recovery Fault Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
7.6.2 Latched Fault Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Chapter 8 Detect State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
8.1 Device Attach / Removal Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
8.2 VBUS Bypass Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
8.3 Attach Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
8.4 Removal Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Chapter 9 Active State . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
9.1 Active State Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
9.2 Active Mode Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
9.3 BC1.2 Detection Renegotiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
9.4 Data Pass-through (No Charger Emulation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
9.5 BC1.2 SDP (No Charger Emulation) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
9.6 BC1.2 CDP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
9.6.1 BC1.2 CDP Charger Emulation Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
9.7 BC1.2 DCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
9.7.1 BC1.2 DCP Charger Emulation Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
9.8 Dedicated Charger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
9.8.1 Emulation Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
9.8.2 Emulation Cycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
9.8.3 DCE Cycle Retry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
9.9 Current Limit Mode Associations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
9.10 No Handshake. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
9.11 Preloaded Charger Emulation Profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
9.11.1 BC1.2 DCP Charger Emulation Profile Within DCE Cycle . . . . . . . . . . . . . . . . . . . . . . . . . 65
9.11.2 Legacy 2 Charger Emulation Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
9.11.3 Legacy 1, 3, 4, and 6 Charger Emulation Profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
9.11.4 Legacy 5 Charger Emulation Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
9.11.5 Legacy 7 Charger Emulation Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
9.12 Custom Charger Emulation Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Chapter 10 Register Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
10.1 Current Measurement Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
10.2 Total Accumulated Charge Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
10.3 Status Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
SMSC UCS1002
5
DATASHEET
Revision 1.4 (07-16-13)

5 Page





UCS1002-1 arduino
Programmable USB Port Power Controller with Charger Emulation
Datasheet
Table 1.1 Terms and Abbreviations (continued)
TERM /
ABBREVIATION
DESCRIPTION
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
ILIM
Legacy
Current limiter mode boundary.
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.
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
removal
A Removal Detection event occurs when the current load on the VBUS pin drops to less
than IREM_QUAL for longer than tREM_QUAL.
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.
SMSC UCS1002
11
DATASHEET
Revision 1.4 (07-16-13)

11 Page







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