UCS1001 USB Port Power Controller with Charger Emulation Datasheet PRODUCT FEATURES General Description Features Port power switch with two current limit behaviors The UCS1001 provides a USB port power switch for 2.9 V to 5.5 V source voltage range precise control of up to 2.5 amperes continuous current Up to 2.5 A current with 55 m On Resistance with over-current limit (OCL), dynamic thermal Over-current trip or constant current limiting management, latch or auto-recovery (low test current) Soft turn-on circuitry fault handling, selectable active low or high enable, Selectable current limit under- and over-voltage lockout, back-drive protection, Dynamic thermal management and back-voltage protection. Under- and over-voltage lockout Back-drive, back-voltage protection Split supply support for VS and VDD is an option for low Latch or auto-recovery (low test current) fault handling power in system standby states. This gives battery Selectable active high or low power switch enable operated applications, like notebook PCs, the ability to BC1.2 VBUS discharge port renegotiation function detect attachments from a sleep or off state. After the Selectable / automatic cycling of USB data line Attach Detection is flagged, the system can decide to charger emulation profiles wake up and/or provide charging. USB-IF BC1.2 charging downstream port (CDP) & In addition to power switching and current limiting dedicated charging port (DCP) modes, YD/T-1591, and modes, the UCS1001 will automatically charge a wide most Apple and RIM protocols standard USB 2.0 compliant high-speed data switch (in Pass- variety of portable devices, including USB-IF BC1.2, through and CDP modes) YD/T-1591 (2009), most Apple and RIM , and many Nine preloaded charger emulation profiles for maximum others. Nine preloaded charger emulation profiles compatibility coverage of peripheral devices maximize compatibility coverage of peripheral devices. Charging Active (UCS1001-1) or Attach Detection The UCS1001 is available in a 20-pin QFN 4 mm x (UCS1001-2) open-drain output 4 mm package. Fault Alert open-drain output Applications Ultra low power Sleep state Notebook and Netbook Computers Optional split supply support for VBUS and VDD for low power in system standby states Tablets and E-book readers Wake on Attach USB (UCS1001-2) Desktops and Monitors Wide operating temperature range: -40 C to +85 C Docking Stations and Printers IEC61000-4-2 8 / 15 kV ESD immunity AC-DC wall adapters UL recognized and EN/IEC 60950-1 (CB) certified SMSC UCS1001 Revision 1.2 (05-21-12) DATASHEETUSB Port Power Controller with Charger Emulation Datasheet Block Diagram DPIN DPOUT USB 2.0 HS Data Switch & Charger Emulator DMOUT DMIN VDD VDD Attach Detector VS VBUS UVLO, GND Power OVLO Switch ILIM ALERT CHRG (UCS1001-1 only) A DET (UCS1001-2 only) VDD PWR EN Interface, Temp SEL Charger Control, Logic Measurement, EM EN OCL M1 M2 S0 LATCH Revision 1.2 (05-21-12) 2 SMSC UCS1001 DATASHEET