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TPS2370 Status: NRND

IEEE802.3af Power Interface Switch For Power-Over-Ethernet (PoE) Powered Devices (PD's)


      
         
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Alert Icon   NRND: This product is not recommended for new designs. However, the device, tool, or software continues to be in production to support existing customers. TI does not recommend using this part in a new design. TI encourages designers to consider alternative products for new designs.

Replaced By:

  • TPS2375 The device has the SAME FUNCTIONALITY and PINOUT as the compared device but is NOT an exact equivalent.TPS2375 is an enhanced (2nd generation) replacement for TPS2370. 

Product Information

Features

  • Integrated Power Interface Switch for IEEE 802.3af Powered Devices (PDs)
  • Provides PD Detection Signature
  • Provides PD Classification Signature (Class 0-4)
  • Programmable Inrush Current Limit
  • Internal 0.3- Low-Side FET
  • Interfaces to DC/DC Soft-Start for DC/DC Enable
  • Internal Thermal Protection — Disconnects PD Load
  • Minimal External Parts Count
  • 8-Pin SOIC, 8-Pin TSSOP Packages
  • APPLICATIONS
    • VoIP Phones
    • Internet Appliances
    • Wireless LAN Access Points
    • Bluetooth™ Access Points

PowerPAD is a trademark of Texas Instruments. Bluetooth is a trademark of Telefonaktiebolaget LM Ericsson.

Description

Acting as an interface between the Power Source Equipment (PSE) and the Powered Device (PD), the TPS2370 performs all detection, classification, inrush current limiting, and switch FET control that is necessary for compliance with the IEEE 802.3af Standard. An internal 0.3- FET provides maximum power delivery. As an additional feature, the TPS2370 interfaces with the enable/soft-start signal of a dc-to-dc converter, eliminating the need to have an accurate UVLO in the dc-to-dc converter.

At low-input voltages (1.8 V to 10 V), the TPS2370 draws less than 12 µA, allowing accurate sensing of the external 24.9-k discovery resistor. At input voltages between 15 V and 20 V, an external resistor sets the level of current to be drawn during classification mode. TPS2370 is compatible with current as well as voltage measurement schemes for classification. Above 20-V input, the classification current is shut off, reducing internal power dissipation.

The TPS2370 drives an internal low-side FET for control of the return side of the power path. The internal FET switch is turned on when the input voltage reaches 40 V and above. When the input voltage decreases, the FET remains on until the input voltage drops to below 30 V.

During initial turn-on of the switch (inrush mode), an external resistor is used to program the inrush current, allowing a wide range of capacitor values to be used at the load. According to IEEE 802.3 af specification, inrush current of 400 mA is allowed only for 50 ms, limiting the load capacitor to approximately 180 µF. A programmable inrush current limit removes this limitation, allowing a larger capacitor to be used with a lower inrush current limit.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
TPS2370DNRND0 to 702.75 | 100uSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintNot Available
TPS2370DG4NRND0 to 702.75 | 100uSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintNot Available
TPS2370DRNRND0 to 702.50 | 100uSOIC (D) | 8 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintNot Available
TPS2370DRG4NRND0 to 702.50 | 100uSOIC (D) | 8 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintNot Available
TPS2370PWNRND0 to 702.75 | 100uTSSOP (PW) | 8 View 150 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintNot Available
TPS2370PWG4NRND0 to 702.75 | 100uTSSOP (PW) | 8 View 150 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintNot Available
TPS2370PWRNRND0 to 702.50 | 100uTSSOP (PW) | 8 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintNot Available
TPS2370PWRG4NRND0 to 702.50 | 100uTSSOP (PW) | 8 View 2000 | LARGE T&R  Not Available

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

Reported Distributor Inventory as of 10:08 AM GMT, 06 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 4 WeeksTPS2370D
AmericasArrow 35
Rochester Electronics 9
TI Lead Time*: 4 WeeksTPS2370DG4
None Reported
View Distributors
TI Lead Time*: 20 WeeksTPS2370DR
AmericasRochester Electronics >1k
TI Lead Time*: 20 WeeksTPS2370DRG4
None Reported
View Distributors
TI Lead Time*: 4 WeeksTPS2370PW
AmericasRochester Electronics >1k
WorldwideDigiKey 13
Mouser Electronics 148
TI Lead Time*: 4 WeeksTPS2370PWG4
EuropeEBV Elektronik 5
WorldwideDigiKey  Available
TI Lead Time*: 4 WeeksTPS2370PWR
AmericasRochester Electronics >1k
WorldwideDigiKey  Available
TI Lead Time*: 4 WeeksTPS2370PWRG4
WorldwideDigiKey  Available
View all Distributors  

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

 Product ContentDPPM / MTBF / FIT Rate
DeviceEco Plan* Lead / Ball FinishMSL Rating / Peak ReflowDetailsDetails
TPS2370D  Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TPS2370DG4  Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TPS2370DR  Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TPS2370DRG4  Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TPS2370PW  Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TPS2370PWG4  Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TPS2370PWR  Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TPS2370PWRG4  Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

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Technical Documents

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Application Notes

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