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TPS2074DBR Datasheet

  • TPS2074DBR

  • FOUR-PORT USB HUB POWER CONTROLLERS

  • 414.73KB

  • 25頁

  • TI

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TPS2074, TPS2075
FOUR-PORT USB HUB POWER CONTROLLERS
SLVS288A 鈥?SEPTEMBER 2000 鈥?REVISED FEBRUARY 2001
D
D
D
D
D
D
D
D
D
D
Complete USB Hub Power Solution
Meets USB Specifications 1.1 and 2.0
Independent Thermal and Short-Circuit
Protection
3.3-V Regulator for USB Hub Controller
Overcurrent Logic Outputs
4.5-V to 5.5-V Operating Range
CMOS- and TTL-Compatible Enable Inputs
185
碌A(chǔ)
Bus-Power Supply Current
Available in 24-Pin SSOP Package
鈥?0擄C to 85擄C Ambient Temperature Range
DB PACKAGE
(TOP VIEW)
description
The TPS2074 and TPS2075 provide a complete
USB hub power solution by incorporating three
major functions: current-limited power switches
for four ports, a 3.3-V 100-mA regulator, and a
DP0 line control to signal attach/detach of the hub.
These devices are designed to meet bus-pow-
ered and self-powered hub requirements. These
devices are also designed for hybrid hub
implementations and allow for automatic switch-
ing from self-powered mode to bus-powered
mode if loss of self-power is experienced. This
feature can be disabled by applying a logic high to
the BP_DIS input
Each port has a current-limited 100-m鈩?N-
channel MOSFET high-side power switch for
500 mA self-powered operation. Each port also
has a current-limited 500-m鈩?N-channel MOS-
FET high-side power switch for 100-mA bus-
powered operation. All the N-channel MOSFETs
are designed without parasitic diodes, preventing
current backflow into the inputs.
For applications where a 5-V regulator is needed,
use the TPS2070 or TPS2071 device.
PG_DLY
EN1
AGND
PG
SP
SP
NC
3.3V_OUT
BPMODE
鈥?/div>
DP0_RST
EN2
DGND
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
BP_DIS
BP
OUT1
OUT2
OUT3
OUT4
OC4
OC3
OC2
OC1
EN4
EN3
NC 鈥?No internal connection
鈥?Pin 9 is active low (BPMODE) for TPS2074
and active high (BPMODE) for TPS2075.
simplified hybrid-hub diagram
鈥?/div>
D+
D鈥?/div>
Power
Supply
SP
TPS2074
OUT3
DP0_RST
BP
3.3 V_OUT
1.5
k鈩?/div>
OUT4
BPMODE
OUT1
OUT2
D+
D鈥?/div>
5V
GND
5V
GND
Downstream
Ports
VCC EN OC
DP1
DM1
DP2
DM2
DP3
DM3
DP4
DM4
D+
D鈥?/div>
5V
GND
Upstream
Port
D+
D鈥?/div>
5V
GND
DP0
DM0
Hub
Controller
D+
D鈥?/div>
5V
GND
鈥?See Figure 33 for complete implementation.
SELECTION GUIDE
TA
USB HUB POWER CONTROLLERS
Four-port
Four port with internal LDO controller
鈥?40擄C to 85擄C
Four port without internal LDO controller
Four-port
24
PACKAGED DEVICES
PIN COUNT
32
BPMODE
Active low
Active high
Active low
Active high
HTSSOP (DAP)
TPS2070DAP
TPS2071DAP
鈥?/div>
鈥?/div>
SSOP (DB)鈥?/div>
鈥?/div>
鈥?/div>
TPS2074DB
TPS2075DB
鈥?The DB package is available taped and reeled. Add an R suffix to the device type (e.g., TPS2074DBR).
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright
錚?/div>
2001, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
1

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