UCS1001 Datasheet, PDF (1/59 Pages) Microchip Technology – USB Port Power Controller with Charger Emulation

UCS1001
USB Port Power Controller with
Charger Emulation
PRODUCT FEATURES
Datasheet
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 m 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
— 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 (UCS1001-1) or Attach Detection
(UCS1001-2) open-drain output
 Fault Alert 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 (UCS1001-2)
 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
SMSC UCS1001
DATASHEET
Revision 1.2 (05-21-12)