SMSC UCS1001 Revision 1.4 (07-16-13)
DATASHEET
Datasheet
PRODUCT FEATURES
UCS1001-3 UCS1001-4
USB Port Power Controller with Charger Emulation
General Description
The UCS1001 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 UCS1001 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.
The UCS1001 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
— Selectable 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
— Employs unique method and system for sampling
multiple profiles*
— UCS1001-3 and UCS1001-4 supports 12W 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
— 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
Charging Active (UCS1001-3) or Attach Detection
(UCS1001-4) open-drain output
Ultra low power Sleep state
Optional split supply support for VBUS and VDD for
low power in system standby states
Wake on Attach USB (UCS1001-4)
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.