Overview
The TPS2388RTQT is an 8-channel Power Sourcing Equipment (PSE) controller manufactured by Texas Instruments. Designed to comply with the IEEE 802.3at-2012 standard, this component enables the delivery of power over Ethernet (PoE) cables. It is particularly suited for applications requiring efficient power management in networked devices. The TPS2388RTQT is targeted at developers and engineers working on PoE-enabled systems, offering a balance of performance, flexibility, and cost-effectiveness. Its unique selling points include support for both Type-1 and Type-2 PoE classifications, external FET architecture for thermal and efficiency optimization, and advanced port management features.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Number of Channels | 8 | ||
| Compliance | IEEE 802.3at-2012 | Supports Type-1 and Type-2 PoE | |
| Input Voltage Range | 44 to 57 | V | |
| Operating Temperature | -40 to 125 | °C | |
| Package | QFN56 | 56-lead VQFN | |
| Current Sensing Accuracy | 2 | % | |
| Port Current Monitoring | 14-bit | ||
| Communication Interface | I²C | Supports 8-bit and 16-bit modes | |
| Port Priority Levels | 8 | Fast shutdown input | |
| Current Limit | Programmable with foldback | Reduces thermal stress on MOSFETs |
Key Features
- Supports IEEE 802.3at Type-1 and Type-2 PoE classifications.
- External FET architecture for optimized thermal performance and efficiency.
- Advanced port management with 8-level port priority and fast shutdown.
- 14-bit port current and voltage monitoring for precise power management.
- I²C communication interface with watchdog timer for fail-safe operation.
- Programmable current limit with foldback to reduce MOSFET thermal stress.
Applications
The TPS2388RTQT is widely used in various PoE applications, including industrial automation, security systems, and telecommunications. In industrial automation, it powers networked sensors and controllers, ensuring reliable operation in harsh environments. In security systems, it supports IP cameras and access control devices, providing both data and power over a single Ethernet cable. In telecommunications, it enables the deployment of VoIP phones and wireless access points, simplifying infrastructure and reducing installation costs. Its flexibility and compliance with industry standards make it a versatile choice for modern PoE-enabled systems.
Q & A
1. What is the operating voltage range of the TPS2388RTQT?
The TPS2388RTQT operates within an input voltage range of 44V to 57V.
2. Does the TPS2388RTQT support both Type-1 and Type-2 PoE classifications?
Yes, it supports both Type-1 and Type-2 PoE classifications as per the IEEE 802.3at standard.
3. What is the package type of the TPS2388RTQT?
It is available in a 56-lead VQFN (QFN56) package.
4. How many channels does the TPS2388RTQT support?
It supports 8 channels for power delivery over Ethernet.
5. What is the current sensing accuracy of the TPS2388RTQT?
The current sensing accuracy is 2%.
6. Does the TPS2388RTQT include an I²C interface?
Yes, it features an I²C communication interface with support for 8-bit and 16-bit access modes.
7. What is the purpose of the programmable current limit with foldback?
It reduces thermal stress on external MOSFETs during startup and overload conditions.
8. Can the TPS2388RTQT operate in extreme temperatures?
Yes, it operates within a temperature range of -40°C to 125°C.
9. What are the port priority levels in the TPS2388RTQT?
It supports up to 8 levels of port priority for fast shutdown.
10. Is the TPS2388RTQT suitable for industrial applications?
Yes, its robust design and compliance with IEEE standards make it ideal for industrial automation and other demanding environments.
