TPS23753PW

Part: TPS23753, Texas Instruments

Type: Power over Ethernet (PoE) powered device (PD) interface and current-mode dc/dc controller

Key Specs:

• PoE Standard: IEEE 802.3at (13 W, type 1 PD)
• Hotswap MOSFET: 100 V, 0.7 Ω
• System Level ESD: 15 kV / 8 kV
• Operating Junction Temperature Range: -40°C to 125°C
• Duty Cycle: 0 – 80%
• PoE UVLO ON / HYST.: 35/4.5 V
• Recommended Input Voltage (VDD, VDD1, RTN): 0 to 57 V
• Recommended Input Voltage (VC to RTN): 0 to 18 V
• RTN current: 350 mA (max)
• VB sourcing current: 5 mA (max)
• VB capacitance: 0.08 to 2.2 μF
• Synchronization pulse width input: 25 to 150 ns

Features:

• Optimized for Isolated Converters
• Complete PoE Interface
• Adapter ORing Support
• 12 V Adapter Support
• Programmable Frequency with Synch.
• Robust 100 V, 0.7 Ω Hotswap MOSFET
• Small TSSOP 14 Package
• 15 kV / 8 kV System Level ESD Capable
• -40°C to 125°C Junction Temperature Range
• External detection signature pin can disable internal hotswap MOSFET
• Classification programmable to any defined types with a single resistor
• Bootstrap startup mechanism with internal, switched current source
• Programmable oscillator may be synchronized to a higher-frequency external timing reference

Applications:

• IEEE 802.3at Compliant Powered Devices
• VoIP Telephones
• Access Points
• Security Cameras

Package:

• PW (TSSOP-14)

• Optimized for Isolated Converters
• Complete PoE Interface
• Adapter ORing Support
• 12 V Adapter Support
• Programmable Frequency with Synch.
• Robust 100 V, 0.7 Ω 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

• IEEE 802.3at Compliant Powered Devices
• VolP Telephones
• Access Points
• Security Cameras

Refer to Figure 1 for component reference designators @_CS for example ), and the Electrical Characteristics table for values denoted by reference ( V_CSMAX for example). Electrical Characteristic values take precedence over any numerical values used in the following sections.

Unless otherwise noted: CS = APD = CTL = RTN, GATE open, R_FRS = 60.4 k Ω , R_BLNK = 249 k Ω , C_VB = C_VC = 0.1 μ F, R_DEN = 24.9 k Ω , R_CLS open, V_VDD-VSS = 48 V, V_VDD1-RTN = 48 V, 8.5 V ≤ V_VC-RTN ≤ 18 V, -40°C ≤ T_J ≤ 125°C Controller Section Only

[V_SS = RTN and V_DD = V_DD1] or [V_SS = RTN = V_DD] , all voltages referred to RTN. Typical specifications are at 25°C.

Copyright © 2008–2010, Texas Instruments Incorporated

Voltages are with respect to VSS (unless otherwise noted)

⁽¹⁾ Stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

Voltage with respect to V_SS (unless otherwise noted)

Sources of nearby local PCB heating should be considered during the thermal design. Typical calculations assume that the TPS23753 is the only heat source contributing to the PCB temperature rise. It is possible for a normally operating TPS23753 device to experience an OTSD event if it is excessively heated by a nearby device.