UCC39811 PRELIMINARY Universal Serial Bus Hot Swap Power Controller FEATURES DESCRIPTION • Support Four 5V Peripherals and One USB 3.3V Controller The UCC39811 Hot Swap Power Controller is designed to provide a self powered USB hub with a local 3.3V regulated voltage and four 5V regulated voltages for USB ports. Each of the 5V output ports is individually enabled for optimal port control. Each port also provides an overcurrent fault signal indicating that the port has exceeded a 650mA current limit. The 3.3V linear regulator is used to power the local USB microcontroller. This regulator is protected with a 100mA current limit and has a logic level enable input. • Separate Power Enables • 650mA Current Limiting per Channel • Separate Open Drain Fault Indicator for Each Channel • 3.3V Output for USB Controller The UCC39811 can be configured to provide USB port power from a loosely regulated voltage such as a Filament voltage internal to a monitor. Pre-regulation is provided by an internal linear regulator controller and one external logic level N-channel MOSFET. The UCC39811 can also be configured without using the pre-regulator stage by connecting the VREG pins to a regulated 5.5V 2A source. • Available in 20 Pin DIP The UCC39811 comes in a 20-pin DIP package and is protected by internal over-temperature shutdown mechanism, which disables the outputs should the internal junction temperature exceed 150°C. APPLICATION AND BLOCK DIAGRAM + – VFIL 7 VHUB VREG 12 3.3V REGULATOR V33 VREF VREG 20 6 UP STREAM PORT D+ VDRIVE 16 CHARGE PUMP 5 8 2.5V REF D– ENA OCA ENB OCB 18 V5A +5V REG A 19 +5V REG B 1 +5V REG C 13 +5V REG D 11 17 V5B 4 3 USB HUB CONTROLLER ENC OCC END OCD V5C 14 15 9 V5D 10 UCC39811 USB HUB POWER CONTROLLER 2 GND UDG-98199-1 03/99 UCC39811 ABSOLUTE MAXIMUM RATINGS CONNECTION DIAGRAM VFIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9V VHUB Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9V Logic Inputs (ENA-D, ENHUB) Maximum Forced Voltage . . . . . . . . . . . . . . . . . –0.3V to 7V Maximum Forced Current . . . . . . . . . . . . . . . . . . . . . . ±1mA V33 Maximum Forced Voltage. . . . . . . . . . . . . . . . . . . . . . . . . 5V Maximum Current . . . . . . . . . . . . . . . . . . . . . . . . . . . 200mA V5A-D Maximum Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9V Maximum Current . . . . . . . . . . . . . . . . . . . . . . . . . . . 900mA Storage Temperature . . . . . . . . . . . . . . . . . . . −65°C to +150°C Junction Temperature . . . . . . . . . . . . . . . . . . . –55°C to +150°C Lead Temperature (Soldering, 10 sec.) . . . . . . . . . . . . . +300°C DIP 20 (Top View) N Package Unless otherwise indicated, voltages are reference to ground. Pulsed is defined as a less than 10% duty cycle with a maximum duration of 500µS. Currents are positive into, negative out of the specified terminal. All voltages are with respect to ground. Consult Packaging Section of Databook for thermal limitations and considerations of packages. V5B 1 20 VREG GND 2 19 V5A OCB 3 18 ENA ENB 4 17 OCA V33 5 16 VDRIVE VHUB 6 15 OCC VFIL 7 14 ENC VREF 8 13 V5C END 9 12 VREG OCD 10 11 V5D ELECTRICAL CHARACTERISTICS Unless otherwise specified, TJ = 0°C to 125°C for the UCC39811. VFIL = 6.5V, VHUB = 5V. TA = TJ. PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Input Supply Currents VHUB Supply Current No External Load on V33 VFIL Supply Current 1 3 mA 1 3 mA 2.5 2.65 V 3 10 mV 3.3 3.4 V Reference VREF Voltage Over Temperature Line Regulation VHUB = 4.5V to 9V 2.35 3.3V Regulator V33 Voltage TJ = 25°C, ILOAD = 10mA 0mA to 100mA, 0°C to 125°C, VHUB = 4.5V to 9V Short Circuit Current Limit 3.2 3.165 3.3 3.435 V VHUB = 6V, Output shorted to Ground 100 120 150 mA 0A to 2A, 0°C to 125°C, VFIL = 6V to 9V 5.25 5.5 5.7 V TJ = 25°C, ILOAD = 250mA, VREG = 5.5V 4.85 5 5.15 V Pre-Regulator VREG Voltage 5V Regulator V5A-D Voltage Short Circuit Current Limit 0mA to 500mA, 0°C to 125°C 4.8 5 5.2 V VREG = 5.5V, Output Shorted to Ground 650 750 900 mA TJ = 25°C, VFIL = 6V, ENA-D = 5V, ENHUB = 5V 11 11.45 12 V 10.5 11.45 12 V 9 15 kΩ 0.7 V Charge Pump Quiescent Output Voltage 0°C to 125°C, VFIL = 6V Output Impedance Enable Inputs ENA-D Inputs - Guaranteed Low ENA-D Inputs - Guaranteed High 3 V ENHUB Input - Guaranteed Low 0.7 ENHUB Input - Guaranteed High 3 V V Overcurrent Signals Active Sink Current IOCX =100 A 140 2 500 mV UCC39811 PIN DESCRIPTIONS ENA-D: Separate enables pins for each of the four 5V supplies. V33: 3.3V regulator output. Enable when ENHUB is high. Current limit is 100mA minimum. ENHUB: Enables the 3.3V output V33. Pulling this pin low disables V33. VDRIVE: Internal charge pump voltage is brought out for external decoupling. Nominal voltage is between 11V and 13V. No external loading permitting. Decouple with at least 0.001µF capacitor. GATE: Gate drive for an external NMOS used to regulate the 5.5V VREG supply. Minimum available drive is 11V. VFIL: Bias supply for all four of the 5V regulators. VFIL voltage must be between 5.5V and 9V Can be tied to VRE. GND: All 6 GND pins must be tied to the system ground. In addition to serving as electrical conductors, these 6 pins are heat sinks. Refer to the Packaging Device Temperature Management guide in the Packaging section of the Unitrode Databook. VHUB: Supply for the 3.3V USB controller power supply and bandgap reference. VREF: Internal 2.5V reference is brought out for external decoupling only. Decouple with 0.01µF capacitor. OCA-D: Open drain overcurrent indicator. OCA-D can be wire OR'ed by the user to create a single overcurrent indicator. VREG: Regulated to 5.5V by means of an external NMOS. Two pins supply up to a total of 2.5A to the four 5V bus voltages (V5A, V5B, V5C, V5D). V5A-D: 5V regulated output with enable, 500mA (minimum) current limit, and overcurrent indicator. UNITRODE CORPORATION 7 CONTINENTAL BLVD. • MERRIMACK, NH 03054 TEL. (603) 424-2410 • FAX (603) 424-3460 3 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. 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