TI UCC3981DWP

UCC3981
PRELIMINARY
Universal Serial Bus Hot Swap Power Controller
FEATURES
DESCRIPTION
• Fully USB Compliant
The UCC3981 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 500mA 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.
• Support Four 5V Peripherals and One
USB 3.3V Controller
• Separate Power Enables
• 500mA Current Limiting per Channel
• Separate Open Drain Fault Indicator
for Each Channel
• 3.3V Output for USB Controller
• Available in 28 Pin Wide Surface
Mount and DIP
The UCC3981 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 UCC3981 can also be
configured without using the pre-regulator stage by connecting the VREG
pins to a regulated 5.5V 2A source.
The UCC3981 comes in a 28-pin wide SOIC power package optimized
for power dissipation, 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
UCC3981 USB HUB POWER CONTROLLER
UDG-97101
11/98
UCC3981
ABSOLUTE MAXIMUM RATINGS
CONNECTION DIAGRAM
VFIL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9V
VCON Supply Votage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . 750mA
Storage Temperature . . . . . . . . . . . . . . . . . . . −65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . –55°C to +150°C
Lead Temperature (Soldering, 10 sec.) . . . . . . . . . . . . . +300°C
SOIC-28 (Top View)
DWP Package
Unless otherwise indicated, voltages are reference to ground.
Pulsed is defined as a less than 10% duty cycle with a maximum
duration of 500mS. 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.
* DWP package pin 28 serves as signal ground;
Pins 7, 8, 9, 20, 21, 22 serve as heatsink/ground.
ELECTRICAL CHARACTERISTICS Unless otherwise specified, TJ = 0°C to 125°C for the UCC3981. 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
Reference
VREF Voltage
Over Temperature
Line Regulation
VHUB = 4.5V to 9V
2.35
3.3V Regulator
V33 Voltage
TJ = 25°C, ILOAD = 10mA
3.2
3.3
3.4
V
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
0mA to 500mA, 0°C to 125°C
4.8
5
5.2
V
VREG = 5.5V, Output Shorted to Ground
500
600
750
mA
11
11.45
12
V
10.5
11.45
12
V
9
15
kΩ
0mA to 100mA, 0°C to 125°C, VHUB = 4.5V to 9V
Short Circuit Current Limit
Pre-Regulator
VREG Voltage
5V Regulator
V5A-D Voltage
Short Circuit Current Limit
Charge Pump
Quiescent Output Voltage
TJ = 25°C, VFIL = 6V, ENA-D = 5V, ENHUB = 5V
0°C to 125°C, VFIL = 6V
Output Impedance
2
UCC3981
ELECTRICAL CHARACTERISTICS Unless otherwise specified, TJ = 0°C to 125°C for the UCC3981. VFIL = 6.5V,
VHUB = 5V. TA = TJ.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX UNITS
Enable Inputs
ENA-D Inputs - Guaranteed Low
ENA-D Inputs - Guaranteed High
0.7
V
0.7
V
3
V
ENHUB Input - Guaranteed Low
ENHUB Input - Guaranteed High
3
V
Overcurrent Signals
Active Sink Current
IOCX =100mA
140
500
mV
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.
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.
VFIL: Bias supply for all four of the 5V regulators. VFIL
voltage must be between 6V and 9V.
OCA-D: Open drain overcurrent indicator. OCA-D can be
wire OR'ed by the user to create a single overcurrent indicator.
VREF: Internal 2.5V reference is brought out for external
decoupling only. Decouple with 0.01µF capacitor.
VHUB: Supply for the 3.3V USB controller power supply
and bandgap reference.
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
PACKAGE OPTION ADDENDUM
www.ti.com
18-Sep-2008
PACKAGING INFORMATION
Orderable Device
Status (1)
UCC3981DWP
OBSOLETE
Package
Type
Package
Drawing
Pins Package Eco Plan (2)
Qty
UTR
TBD
Lead/Ball Finish
Call TI
MSL Peak Temp (3)
Call TI
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in
a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check
http://www.ti.com/productcontent for the latest availability information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and
package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS
compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)
(3)
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder
temperature.
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Addendum-Page 1
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