TPS23753A IEEE 802.3-2005 PoE Interface and Isolated Converter Controller with Enhanced ESD Ride-Through | TI.com

TPS23753A
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IEEE 802.3-2005 PoE Interface and Isolated Converter Controller with Enhanced ESD Ride-Through

 

Recommended alternative parts

  • TPS23755  -  Use this product in a primary side regulated diode rectified flyback; for 12V or higher output voltage applications.
  • TPS23758  -  Use this product in a primary side regulated synchronous rectified flyback; for 5V or less output voltage applications.

Description

The TPS23753A 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 IEEE 802.3af).

The TPS23753A 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 start-up mechanism with an internal, switched current source. This provides the advantages of cycling overload fault protection without the constant power loss of a pullup resistor.

The programmable oscillator may be synchronized to a higher-frequency external timing reference. The TPS23753A features improvements for uninterrupted device operation through an ESD event.

Features

  • Enhanced ESD Ride-Through Capability
  • Optimized for Isolated Converters
  • Complete PoE Interface
  • Adapter ORing Support
  • 12-V Adapter Support
  • Programmable Frequency With Synchronization
  • Robust 100-V, 0.7-Ω Hotswap MOSFET
  • Small 14-Pin TSSOP Package
  • 15-kV and 8-kV System Level ESD Capable
  • –40°C to 125°C Junction Temperature Range
  • Design Procedure Application Note – SLVA305
  • Adapter ORing Application Note – SLVA306

Parametrics

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Part number Order Vin (Min) (V) Vin (Max) (V) PoE current limit (Min) (mA) PoE inrush limit (Typ) (mA) rDS(on) per FET (Typ) (mOhms) PoE standards supported PD power level DC/DC control Fault response Features Package Group Package size: mm2:W x L (PKG) Switching frequency
TPS23753A Order now 9.3     57     405     140     700     802.3at Type 1 (802.3af)     13W     PD and DC/DC     Auto Retry     Primary Side Adapter Priority
Thermal Shutdown    
TSSOP | 14     14TSSOP: 32 mm2: 6.4 x 5 (TSSOP | 14)     Programmable
Synchronizable    
TPS23750 Order now 0     67     405     140     600     802.3at Type 1 (802.3af)     13W     PD and DC/DC     Auto Retry     Error Amplifier
Thermal Shutdown    
HTSSOP | 20     20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)     Programmable    
TPS23755 Order now 10.2     57     405     140     360     802.3at Type 1 (802.3af)     13W     PD and DC/DC     Auto Retry     Advanced startup
Error Amplifier
Integrated Switching FET
Primary-Side Regulation
Secondary Side Adapter Priority
Spread Spectrum Frequency Dithering
Thermal Shutdown    
VSON | 23     23VSON: 24 mm2: 4 x 6 (VSON | 23)     Programmable
Synchronizable    
TPS23757 Order now 9.3     57     400     140     430     802.3at Type 1 (802.3af)     13W     PD and DC/DC     Auto Retry     Primary Side Adapter Priority
Second Gate Drive
Thermal Shutdown    
TSSOP | 20     20TSSOP: 42 mm2: 6.4 x 6.5 (TSSOP | 20)     Programmable
Synchronizable    
TPS23758 Order now 10.2     57     405     140     360     802.3at Type 1 (802.3af)     13W     PD and DC/DC     Auto Retry     Advanced startup
Error Amplifier
Integrated Switching FET
Primary Side Adapter Priority
Primary-Side Regulation
Spread Spectrum Frequency Dithering
Thermal Shutdown    
VSON | 23     23VSON: 24 mm2: 4 x 6 (VSON | 23)     Programmable
Synchronizable    
TPS23770 Order now 0     67     405     140     600     802.3at Type 1 (802.3af)     13W     PD and DC/DC     Auto Retry     Error Amplifier
Thermal Shutdown    
HTSSOP | 20     20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)     Programmable