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TPS23753

NICHT FÜR NEUE DESIGNS EMPFOHLEN

IEEE 802.3-2005 PoE-Schnittstelle und isolierter Wandler und Controller

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Drop-In-Ersatz mit gegenüber dem verglichenen Baustein verbesserter Funktionalität
TPS23753A AKTIV PoE-Schnittstelle nach IEEE 802.3-2005 und Controller für isolierte Wandler mit erweiterter ESD-Ride This product is integrated and more cost optimized for Type 1 PoE PD.

TPS23753

NICHT FÜR NEUE DESIGNS EMPFOHLEN
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Produktdetails

Vin (min) (V) 9.3 Vin (max) (V) 57 PoE current limit (min) (mA) 405 PoE inrush limit (mA) (typ) (A) 0.14 rDS(on) per FET (typ) (mΩ) 700 PoE standards supported 802.3at Type 1 (802.3af) PD power level 13W DC/DC control PD and DC/DC Fault response Auto Retry Features Primary-side adapter priority, Thermal shutdown Operating temperature range (°C) -40 to 125 Rating Catalog
Vin (min) (V) 9.3 Vin (max) (V) 57 PoE current limit (min) (mA) 405 PoE inrush limit (mA) (typ) (A) 0.14 rDS(on) per FET (typ) (mΩ) 700 PoE standards supported 802.3at Type 1 (802.3af) PD power level 13W DC/DC control PD and DC/DC Fault response Auto Retry Features Primary-side adapter priority, Thermal shutdown Operating temperature range (°C) -40 to 125 Rating Catalog
TSSOP (PW) 14 32 mm² 5 x 6.4
  • Optimized for Isolated Converters
  • Complete PoE Interface
  • Adapter ORing Support
  • 12 V Adapter Support
  • Programmable Frequency with Synch.
  • Robust 100 V, 0.7 Hotswap MOSFET
  • Small TSSOP 14 Package
  • 15 kV / 8 kV System Level ESD Capable
  • –40°C to 125°C Junction Temperature Range
  • Design Procedure Application Note - SLVA305
  • Adapter ORing Application Note - SLVA306
  • APPLICATIONS
    • IEEE 802.3at Compliant Powered Devices
    • VoIP Telephones
    • Access Points
    • Security Cameras
  • Optimized for Isolated Converters
  • Complete PoE Interface
  • Adapter ORing Support
  • 12 V Adapter Support
  • Programmable Frequency with Synch.
  • Robust 100 V, 0.7 Hotswap MOSFET
  • Small TSSOP 14 Package
  • 15 kV / 8 kV System Level ESD Capable
  • –40°C to 125°C Junction Temperature Range
  • Design Procedure Application Note - SLVA305
  • Adapter ORing Application Note - SLVA306
  • APPLICATIONS
    • IEEE 802.3at Compliant Powered Devices
    • VoIP Telephones
    • Access Points
    • Security Cameras

The TPS23753 is a combined Power over Ethernet (PoE) powered device (PD) interface and current-mode dc/dc controller optimized specifically for isolated converter designs. The PoE implementation supports the IEEE 802.3at standard as a 13 W, type 1 PD. The requirements for an IEEE 802.3at type 1 device are a superset of IEEE 802.3-2008 (originally 802.3af) requirements.

The TPS23753 supports a number of input-voltage ORing options including highest voltage, external adapter preference, and PoE preference.

The PoE interface features an external detection signature pin that can also be used to disable the internal hotswap MOSFET. This allows the PoE function to be turned off. Classification can be programmed to any of the defined types with a single resistor.

The dc/dc controller features a bootstrap startup mechanism with an internal, switched current source. This provides the advantages of cycling overload fault protection without the constant power loss of a pull up resistor.

The programmable oscillator may be synchronized to a higher-frequency external timing reference.

The TPS23753 is a combined Power over Ethernet (PoE) powered device (PD) interface and current-mode dc/dc controller optimized specifically for isolated converter designs. The PoE implementation supports the IEEE 802.3at standard as a 13 W, type 1 PD. The requirements for an IEEE 802.3at type 1 device are a superset of IEEE 802.3-2008 (originally 802.3af) requirements.

The TPS23753 supports a number of input-voltage ORing options including highest voltage, external adapter preference, and PoE preference.

The PoE interface features an external detection signature pin that can also be used to disable the internal hotswap MOSFET. This allows the PoE function to be turned off. Classification can be programmed to any of the defined types with a single resistor.

The dc/dc controller features a bootstrap startup mechanism with an internal, switched current source. This provides the advantages of cycling overload fault protection without the constant power loss of a pull up resistor.

The programmable oscillator may be synchronized to a higher-frequency external timing reference.
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Typ Titel Datum
* Data sheet IEEE 802.3 PoE Interface and Isolated Converter Controller datasheet (Rev. C) 04 Jan 2010

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