TPS2041B-Q1
TPS2042B-Q1
TPS2051B-Q1
SLVS782A –NOVEMBER 2007–REVISED JUNE 2010
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TUSB2046
Hub Controller
SN75240
BUSPWR
Tie to TPS2051B EN Input
Downstream
Ports
Upstream
Port
A
B
C
D
GANGED
DP1
DM1
D +
D -
DP0
DM0
D +
D -
Ferrite Beads
A
B
C
D
GND
5 V
GND
SN75240
DP2
DM2
TPS2051B
OC EN
33 µF
(see Note A)
5-V Power
Supply
DP3
DM3
5 V
IN OUT
D +
D -
A
B
C
D
Ferrite Beads
TPS76333
IN
SN75240
GND
5 V
DP4
DM4
0.1 µF
4.7 µF
V
CC
3.3 V
GND
4.7 µF
TPS2042B
33 µF
(see Note A)
PWRON1
GND
EN1
OC1
OUT1
OUT2
OVRCUR1
PWRON2
OVRCUR2
48-MHz
Crystal
EN2
OC2
XTAL1
XTAL2
D +
D -
IN
0.1 µF
Ferrite Beads
Tuning
Circuit
GND
5 V
TPS2042B
EN1
PWRON3
OUT1
OCSOFF
GND
OC1 OUT2
EN2
OVRCUR3
33 µF
(see Note A)
PWRON4
OC2
IN
OVRCUR4
D +
D -
0.1 µF
Ferrite Beads
GND
5 V
33 µF
(see Note A)
A. USB rev 1.1 requires 120 mF per hub.
Figure 28. Hybrid Self-Powered/Bus-Powered Hub Implementation (TPS2042B)
20
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