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參數(shù)資料
| 型號： | 2377-1 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | IEEE 802.3af PoE POWERED DEVICE CONTROLLERS WITH AUTO-RETRY |
| 中文描述： | IEEE 802.3af標(biāo)準(zhǔn)的PoE用電設(shè)備控制器，自動重試 |
| 文件頁數(shù)： | 1/23頁 |
| 文件大小： | 649K |
| 代理商： | 2377-1 |
D8
PW8
www.ti.com
FEATURES
Auto-Retry After Current-Limit Fault
TPS2375-1: IEEE 802.3af Thresholds
TPS2377-1: Legacy Thresholds
Fully Supports IEEE 802.3af Specification
Integrated 0.58-
, 100-V, Low-Side Switch
15-kV System Level ESD Capable
Programmable Inrush Current Control
Fixed 450-mA Current Limit
Open-Drain, Power-Good Reporting
Industrial Temperature Range: -40
°
C to 85
°
C
8-Pin SOIC and TSSOP Packages
APPLICATIONS
VoIP Phones
WLAN Access Points
Security Cameras
Internet Appliances
POS Terminals
DESCRIPTION
These easy-to-use 8-pin integrated circuits contain all of the features needed to develop an IEEE
802.3af-compliant powered device (PD). The TPS2375-1 and TPS2377-1 are second generation PDCs (PD
Controllers) featuring a 100-V ratings and true open-drain, power-good function. These devices are auto-retry
versions of selected TPS2375 family members. Information on the TPS2375/6/7 devices can be found on the
TPS2375/6/7 data sheet (
SLVS525A
).
V
DD
Input
Current
V
RTN
V
Detect
Classify
PowerUp
and
Inrush
Class3
(PG-RTN)
Note:
AllV
oltagesWithRespecttoVSS.
Current
RX
Pair
TPS2375-1
SMAJ58A
0.1 F,100V,10%
m
24.9k
W
1%
VDD
VSS
CLASS
DET
RTN
PG
100k
W
(2)
1
3
6
4
5
7
8
TODC/DC
CONVERTER
ILIM
178k
W
1%
2
RJ-45
DF01S
2Places
Datato
EthernetPHY
Datato
EthernetPHY
R
DET
R
CLASS
357
1%
W
(1)
R
ILIM
47 F,
m
100V
Notes:
1)Class3PDdepicted
2)PGpullupresistorisoptional.
TX
Pair
Spare
Pair
Spare
Pair
TPS2375-1
TPS2377-1
SLVS570–MARCH 2005
IEEE 802.3af PoE POWERED DEVICE CONTROLLERS WITH AUTO-RETRY
PRODUCT SELECTOR
2375-1
2377-1
2375
2376
2377
UVLO
802.3af
Legacy
802.3af
Adjustable
Legacy
Protection
Auto-Retry
Auto-Retry
Latch
Latch
Latch
Package
PW
D
D, PW
D,PW
D,PW
In addition to the basic functions of detection, classification, and undervoltage lockout (UVLO), these controllers
include an adjustable inrush limiting feature. The TPS2375-1 has 802.3af-compliant UVLO limits, and the
TPS2377-1 has legacy UVLO limits.
The TPS2375 family specifications incorporate a voltage offset of 1.5 V between its limits and the IEEE 802.3af
specifications to accommodate the required input diode bridges used to make the PD polarity insensitive.
Additional resources can be found on the TI Web site www.ti.com.
Figure 1. Typical Application Circuit and Start-Up Waveforms
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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright 2005, Texas Instruments Incorporated
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