Overview
The TPS23751PWPR, produced by Texas Instruments, is a 16-pin integrated circuit that combines a Power-over-Ethernet (PoE) powered device (PD) interface and a current-mode DC-DC controller. This device is optimized for applications requiring high efficiency over a wide load range and is compliant with IEEE 802.3at type-2 hardware classification. It features a robust 100 V, 0.5 Ω hotswap MOSFET and supports up to 25.5 W PDs. The DC-DC controller includes internal soft-start, a bootstrap startup current source, current-mode control with slope compensation, blanking, and current limiting. The device also includes an auxiliary power detect (APD) input and a disable function (DEN), enhancing its versatility and efficiency in various PoE applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Junction Temperature Range | -40 | 125 | °C | |
| Hotswap MOSFET Resistance | 0.5 | Ω | ||
| Hotswap MOSFET Voltage | 100 | V | ||
| Power Rating | 25.5 | W | ||
| Inrush Current | 140 | mA | ||
| UVLO Rising Threshold | 36.3 | 38.1 | 40 | V |
| UVLO Falling Threshold | 30.5 | 32.0 | 33.6 | V |
| Thermal Shutdown | 135 | 145 | 155 | °C |
| Junction-to-Ambient Thermal Resistance | 39.5 | °C/W |
Key Features
- IEEE 802.3at Classification With Status Flag
- High Efficiency Solutions Over Wide Load Range
- Powers Up to 25.5 W PDs
- Robust 100 V, 0.5 Ω Hotswap MOSFET
- Synchronous Rectifier Disable Signal
- PowerPAD™ TSSOP Packages
- Complete PoE Interface Plus DC-DC Controller
- Adapter ORing Support
- Programmable Frequency
- Internal Soft-Start, Bootstrap Startup Current Source, Current-Mode Control with Slope Compensation, Blanking, and Current Limiting
Applications
- IEEE 802.3at-Compliant Devices
- Video and VoIP Telephones
- Multiband Access Points
- Security Cameras
- Pico-Base Stations
Q & A
- What is the TPS23751PWPR used for?
The TPS23751PWPR is used as a Power-over-Ethernet (PoE) powered device (PD) interface and a current-mode DC-DC controller, particularly in applications requiring high efficiency over a wide load range. - What is the maximum power rating of the TPS23751PWPR?
The TPS23751PWPR can power up to 25.5 W PDs. - What type of MOSFET does the TPS23751PWPR feature?
The device features a robust 100 V, 0.5 Ω hotswap MOSFET. - What are the key features of the DC-DC controller in the TPS23751PWPR?
The DC-DC controller includes internal soft-start, a bootstrap startup current source, current-mode control with slope compensation, blanking, and current limiting. - What is the junction temperature range of the TPS23751PWPR?
The junction temperature range is -40°C to 125°C. - What are some typical applications of the TPS23751PWPR?
Typical applications include IEEE 802.3at-compliant devices, video and VoIP telephones, multiband access points, security cameras, and pico-base stations. - Does the TPS23751PWPR support sleep modes?
No, the TPS23751PWPR does not support sleep modes. However, the TPS23752, an extended version, includes ultra-low power sleep modes. - What is the thermal shutdown temperature of the TPS23751PWPR?
The thermal shutdown temperature is between 135°C and 155°C. - How does the TPS23751PWPR enhance efficiency at light loads?
Efficiency is enhanced by disabling synchronous rectification and entering variable frequency operation (VFO) at light loads. - What is the package type of the TPS23751PWPR?
The device is available in a 16-pin TSSOP package.
