Datasheet
Table Of Contents
- FEATURES
- DESCRIPTION
- FUNCTIONAL BLOCK DIAGRAMS
- DETAILED DESCRIPTION
- ABSOLUTE MAXIMUM RATINGS
- DISSIPATION RATING TABLE
- RECOMMENDED OPERATING CONDITIONS
- ELECTRICAL CHARACTERISTICS OVER RECOMMENDED OPERATING JUNCTION TEMPERATURE RANGE
- ENABLE INPUT ENx OR ENx
- CURRENT LIMIT
- SUPPLY CURRENT (TPS2045A, TPS2055A)
- SUPPLY CURRENT (TPS2046A, TPS2056A)
- SUPPLY CURRENT (TPS2047A, TPS2057A)
- SUPPLY CURRENT (TPS2048A, TPS2058A)
- UNDERVOLTAGE LOCKOUT
- OVERCURRENT OC
- PARAMETER MEASUREMENT INFORMATION
- TYPICAL CHARACTERISTICS
- APPLICATION INFORMATION
- POWER-SUPPLY CONSIDERATIONS
- OVERCURRENT
- OC RESPONSE
- POWER DISSIPATION AND JUNCTION TEMPERATURE
- THERMAL PROTECTION
- UNDERVOLTAGE LOCKOUT (UVLO)
- UNIVERSAL SERIAL BUS (USB) APPLICATIONS
- HOST/SELF-POWERED AND BUS-POWERED HUBS
- LOW-POWER BUS-POWERED FUNCTIONS AND HIGH-POWER BUS-POWERED FUNCTIONS
- USB POWER-DISTRIBUTION REQUIREMENTS
- GENERIC HOT-PLUG APPLICATIONS (see )
www.ti.com
†
USB rev 1.1 requires 120 µF per hub.
DP1
DM1
DP2
DM2
DP3
DM3
DP4
PWRON1
OVRCUR1
PWRON2
OVRCUR2
PWRON3
OVRCUR3
PWRON4
OVRCUR4
DM4
DP0
DM0
V
CC
XTAL1
XTAL2
OCSOFF
SN75240
D +
D −
5 V
GND
D +
D −
5 V
D +
D −
5 V
D +
D −
5 V
48-MHz
Crystal
Downstream
Ports
TUSB2040
Hub Controller
Tuning
Circuit
A
B
C
D
33 µF
†
SN75240
A
B
C
D
GND
GND
GND
33 µF
†
33 µF
†
33 µF
†
D +
D −
Upstream
Port
SN75240
A
B
5 V
GND
C
D
GND
Ferrite Beads
Ferrite Beads
Ferrite Beads
Ferrite Beads
BUSPWR
GANGE
D
IN
GND
3.3 V
4.7 µF
0.1 µF
4.7 µF
GND
EN
OC
IN
TPS2045A
OUT
EN
OC
IN
TPS2045A
OUT
EN
OC
IN
TPS2045A
OUT
EN
OC
IN
TPS2045A
OUT
TPS76333
0.1 µF
0.1 µF
0.1 µF
0.1 µF
TPS2045A , , TPS2046A
TPS2047A , TPS2048A , TPS2055A
TPS2056A , TPS2057A , TPS2058A
SLVS251C – SEPTEMBER 2000 – REVISED JANUARY 2008
Figure 27. Bus-Powered Hub Implementation, TPS2045A
Copyright © 2000 – 2008, Texas Instruments Incorporated Submit Documentation Feedback 23
Product Folder Link(s): TPS2045A TPS2046A TPS2047A TPS2048A TPS2055A TPS2056A TPS2057A TPS2058A