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SMSC UCS1002 Revision 1.2 (05-21-12)
PRODUCT PREVIEW
Data Brief
PRODUCT FEATURES
UCS1002
Programmable USB Port Power Controller
with Charger Emulation
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.
The UCS1002 also provides current monitoring to allow
intelligent management of system power and charge
rationing 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 m 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
— 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 / I
2
C
®
— 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
Self-contained current monitoring and charge
rationing for power allocation applications
Automatic shutdown when Battery Full option
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 / I
2
C 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
