Calculation tool
TPS23753
IEEE 802.3-2005 PoE Interface and Isolated Converter and Controller
Data sheet
Although this product continues to be in production to support previous designs, we don't recommend it for new designs. Consider one of these alternates:
TPS23753
- 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.
Technical documentation
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View all 10 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | IEEE 802.3 PoE Interface and Isolated Converter Controller datasheet (Rev. C) | 04 Jan 2010 | |
| Technical article | How to reduce the size of your 13-W PoE PD solution | 25 Jun 2019 | ||
| Technical article | Maximizing PoE PD efficiency on a budget | 10 Nov 2015 | ||
| Application note | Lightning Surge Considerations for PoE Powered Devices | 30 Apr 2015 | ||
| Application note | Designing with the TPS23753 Powered Device and Power Supply Controller (Rev. C) | 10 Jan 2013 | ||
| Application note | Implementing a Buck Converter With the TPS23753A | 20 Sep 2010 | ||
| Application note | Advanced Adapter ORing Solutions using the TPS23753 (Rev. A) | 09 Feb 2009 | ||
| Application note | PoE Powered Device for 24 VAC Building Power Applications | 10 Sep 2008 | ||
| Application note | Designing an EMI Compliant PoE with Isolated Flyback | 20 May 2008 | ||
| Application note | Practical Guidelines EMI Compliant PoE | 27 Mar 2008 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
TPS23753AEVM-001 — 5Vout, 7W, IEEE 802.3-2005 Compliant, PD Controller, PS Controller EVM for TPS23753AEVM-001
The TPS23753AEVM-001 contains evaluation and reference circuitry for the TPS23753A, which is a Class 3 PoE PD + PWM Controller. It contains input and output power connectors and an array of onboard test points for circuit evaluation. The TPS23753AEVM-002 (3.3-V output) can be configured with simple (...)
User guide: PDF
Evaluation board
TPS23753AEVM-004 — TPS23753AEVM-004 3.3Vout 10W IEEE 802.3-2005 Compliant PD Contr, PS Contr Evaluation Module
TPS23753AEVM-004 contains evaluation and reference circuitry for the TPS23753A, which is a Class 3 PoE PD + PWM Controller. It contains input and output power connectors and an array of onboard test points for circuit evaluation. The TPS23753AEVM-003 (5-V output) and TPS23753AEVM-005 (12-V output) (...)
User guide: PDF
Simulation tool
PSPICE-FOR-TI — PSpice® for TI design and simulation tool
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
| Package | Pins | Download |
|---|---|---|
| TSSOP (PW) | 14 | View options |
Ordering & quality
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Support & training
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