Professional IC Distribution & Technical Solutions

TPS23750PWPR (Texas Instruments)

#### Description

The TPS23750PWPR is a PoE (Power over Ethernet) PD (Powered Device) interface controller with integrated DC-DC converter control. It is designed for IEEE 802.3at (PoE+) compliant applications, supporting high-power PDs up to 25.5W.

This IC integrates a PoE PD interface, a current-mode DC-DC controller, and thermal protection, making it suitable for powering devices such as IP phones, wireless access points, security cameras, and industrial IoT equipment.

#### Key Features

• IEEE 802.3af/at (PoE/PoE+) compliant
• Supports up to 25.5W PD power
• Integrated PD interface with detection, classification, and undervoltage lockout (UVLO)
• Current-mode DC-DC controller with adjustable switching frequency (100kHz to 250kHz)
• Programmable current limit and soft-start
• Thermal shutdown protection
• Wide input voltage range (36V to 57V)
• Low standby power consumption
• Available in HTSSOP-20 (PW) package with PowerPAD™ for thermal management

#### Applications

• VoIP phones
• Wireless access points
• IP cameras
• Industrial IoT devices
• Building automation systems

#### Package & Ordering Information

• Package: HTSSOP-20 (PowerPAD™)
• Ordering Code: TPS23750PWPR
• Reel Quantity: 2000 units per reel

For detailed electrical specifications, refer to the official Texas Instruments datasheet.

# TPS23750PWPR: Power over Ethernet (PoE) Powered Device Controller

## Practical Application Scenarios

The TPS23750PWPR from Texas Instruments is a highly integrated IEEE 802.3bt-compliant Power over Ethernet (PoE) Powered Device (PD) controller, designed for applications requiring high-power delivery over Ethernet cables. Its primary use cases include:

1. IP Cameras and Surveillance Systems – The TPS23750PWPR supports up to 25.5W (Class 4) or higher with external components, making it ideal for high-resolution IP cameras with pan-tilt-zoom (PTZ) functionality.

2. Wireless Access Points (WAPs) – Modern Wi-Fi 6/6E access points demand higher power budgets, which the TPS23750PWPR efficiently delivers while maintaining compliance with PoE standards.

3. Industrial IoT Devices – Ruggedized sensors, actuators, and edge computing modules benefit from the controller’s robust power management and fault protection.

4. Digital Displays and Signage – The device enables power and data delivery over a single cable, simplifying installations for digital signage in retail and transportation environments.

5. Medical Devices – PoE-powered medical equipment, such as patient monitors, leverages the TPS23750PWPR’s reliability and isolation features for safe operation.

## Common Design-Phase Pitfalls and Avoidance Strategies

1. Inadequate Thermal Management – The TPS23750PWPR can dissipate significant heat in high-power applications.

• *Solution*: Ensure proper PCB layout with sufficient copper area for heat sinking and consider external MOSFETs with low RDS(on) to minimize losses.

2. Incorrect Classification Setup – Misconfiguring the PD class (0-8) may lead to insufficient power allocation.

• *Solution*: Use the integrated auto-classification feature or verify resistor settings per IEEE 802.3bt standards.

3. Poor EMI Performance – High switching frequencies can introduce electromagnetic interference.

• *Solution*: Implement proper input/output filtering and follow TI’s layout guidelines for minimizing loop areas.

4. Fault Protection Oversights – Overcurrent, overvoltage, or short-circuit events can damage the system.

• *Solution*: Leverage the built-in protection features (e.g., UVLO, thermal shutdown) and validate fault responses during prototyping.

## Key Technical Considerations for Implementation

1. Input Voltage Range – The TPS23750PWPR operates with a wide input range (2.7V to 57V), accommodating both low-power and high-power PoE applications.

2. External MOSFET Selection – Choose MOSFETs with low gate charge (Qg) and RDS(on) to optimize efficiency, especially in high-current designs.

3. Isolation Requirements – For safety-critical applications, ensure proper isolation between PoE and system grounds, adhering to relevant standards (e.g., IEC 60950).

4. Startup Sequencing – Verify that the PD’s inrush current complies with IEEE 802.3bt limits to avoid tripping the Power Sourcing Equipment (PSE).

By addressing these considerations and avoiding common pitfalls, designers can maximize the reliability and performance of the TPS23750PW