UCS1002-2
Programmable USB Port Power Controller
with Charger Emulation
Datasheet
PRODUCT FEATURES
General Description
Features
Port power switch with two current limit behaviors
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.
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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
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Customizable emulation profile uses a unique stimulus
and response method useful for future profiles*
Supports 12W charger emulation
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.
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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
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Fault Alert open-drain output
Self-contained current monitoring
Low power Attach Detection and open-drain A_DET#
pin
Ultra low power Sleep state
The UCS1002 is available in a 20-pin QFN 4 mm x
4 mm package.
Optional split supply support for VBUS and VDD for
low power in system standby states
Wake on Attach USB
Applications
SMBus 2.0 / I2C communications
Notebook and Netbook Computers
Tablets and E-book readers
Desktops and Monitors
Docking Stations and Printers
AC-DC wall adapters
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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
Revision 1.4 (07-16-13)
DATASHEET