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2375

更新时间: 2022-04-23 23:00:11
品牌 Logo 应用领域
德州仪器 - TI 控制器
页数 文件大小 规格书
23页 671K
描述
IEEE 802.3af PoE POWERED DEVICE CONTROLLERS WITH AUTO-RETRY

2375 数据手册

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TPS2375-1  
D−8  
PW−8  
TPS2377-1  
www.ti.com  
SLVS570MARCH 2005  
IEEE 802.3af PoE POWERED DEVICE CONTROLLERS WITH AUTO-RETRY  
FEATURES  
APPLICATIONS  
VoIP Phones  
Auto-Retry After Current-Limit Fault  
TPS2375-1: IEEE 802.3af Thresholds  
TPS2377-1: Legacy Thresholds  
WLAN Access Points  
Security Cameras  
Internet Appliances  
POS Terminals  
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  
PRODUCT SELECTOR  
2375-1  
2377-1  
2375  
802.3af  
Latch  
2376  
Adjustable  
Latch  
2377  
Legacy  
Latch  
UVLO  
802.3af  
Legacy  
Protection Auto-Retry Auto-Retry  
Package PW  
Open-Drain, Power-Good Reporting  
Industrial Temperature Range: -40°C to 85°C  
8-Pin SOIC and TSSOP Packages  
D
D, PW  
D,PW  
D,PW  
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).  
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.  
Power Up  
RJ-45  
and  
1
Detect  
Classify  
Inrush  
TX  
Pair  
Data to  
Ethernet PHY  
2
Class 3  
Input  
Current  
Current  
DF01S  
2 Places  
V
(PG-RTN)  
DET  
PG  
ILIM  
V
4
DD  
5
Spare  
V
Pair  
CLASS  
RTN  
RTN  
7
8
Spare  
Pair  
Note: All Voltages With Respect to VSS.  
3
RX  
Notes:  
1) Class 3 PD depicted  
2) PG pullup resistor is optional.  
Data to  
Pair  
Ethernet PHY  
6
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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