TPS23750 IEEE 802.3af PD Controller with Integrated DC/DC | TI.com

TPS23750
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
IEEE 802.3af PD Controller with Integrated DC/DC

 

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 TPS23750 integrates the functionality of the TPS2375 with a primary side dc/dc PWM controller. The designer can create a front-end solution for PoE-PD applications with minimum external components. The TPS23770 is identical to the TPS23750 with the exception of the undervoltage lockout turn-on voltage, which is compatible with legacy systems.

The PoE front end has all the necessary IEEE 802.3af functions including detection, classification, undervoltage lockout and inrush control. The PoE input switch is integrated within the TPS23750.

The dc/dc controller section is designed to support flyback, forward, and nonsynchronous low-side switch buck topologies.

The external switching MOSFET and current sense resistor provide flexibility in topology, power level, and current limit. The full-featured dc/dc controller includes programmable soft start, hiccup type fault limiting, 50% maximum duty cycle, programmable constant switching frequency, and a true voltage-output error amplifier. Additional protection features provide for robust designs.

Features

  • Complete 802.3af PoE Interface
    • Features derived from the TPS2375
    • 100 V, 0.6 Internal Pass MOSFET
    • Standard and Legacy UVLO Choices
    • Fixed 140 mA Inrush Limit
  • Primary Side DC/DC Converter Control
    • Minimum External Component Count
    • Current Mode Control
    • Isolated and Non-Isolated Topologies
    • Programmable Operating Frequency
    • Current Sense Leading-edge Blanking
    • 50% Duty Cycle Limiting
    • Voltage Output Error Amplifier
  • Internal PoE and Converter Sequencing
  • Industry-Standard 20 Lead Package
  • Industrial Temperature Range, -40°C to 85°C
  • APPLICATIONS
    • All PoE PD Devices Including:
      • Wireless Access Points
      • VoIP Phones
      • Security Cameras

PowerPAD is a trademark of Texas Instruments.

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
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    
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    
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