TI UCC39811

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
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