Overview
The TPS2378EVM-105 is an evaluation module designed by Texas Instruments to facilitate the full evaluation of the TPS2378 IEEE 802.3at Type 2 compliant powered device (PD) controller. This module is essential for developers and engineers working on Power over Ethernet (PoE) applications, particularly those requiring high power delivery. The TPS2378EVM-105 allows users to test and validate the performance of the TPS2378 device in various configurations, including its ability to handle auxiliary power adapters and its integration with DC-DC converters.
Key Specifications
| Parameter | Condition | Min | Max | Units | |
|---|---|---|---|---|---|
| Input Voltage Applied to the power pins of connectors J1 or J3 | 0 | 57 | V | ||
| Operating Voltage After start up | 30 | 57 | V | ||
| Rising input voltage at device terminals | 40 | V | |||
| Input UVLO Detection voltage At device terminals | 30.5 | V | |||
| Classification voltage At device terminals | 11.9 | 23.0 | V | ||
| Classification current Rclass = 63.4 Ω | 38 | 42 | mA | ||
| Inrush current-limit | 100 | 180 | mA | ||
| Operating current-limit | 850 | 1200 | mA | ||
| Efficiency | Measured from J1 to J6 with J5 shorted | 97.4% | |||
| Output power | 31W |
Key Features
- Gigabit Ethernet pass through interface
- Switched output return for “ease of use” loading
- Adapter input capability
- IEEE 802.3at type-2 hardware classification with status flag (T2P) and LED
- DC/DC converter enable (CDB)
- Robust 100 V, 0.5 Ω hotswap MOSFET
- Operating current up to 1A typical
- Auxiliary power detect (APD) input for priority to external power adapter
- 140 mA inrush current limiting
- Type-2 indication
- Auto-retry fault protection
- Open-drain power-good output
Applications
- IEEE 802.3at-compliant devices
- Video and VoIP telephones
- Multiband access points
- Security cameras
- Pico-base stations
Q & A
- What is the TPS2378EVM-105 used for?
The TPS2378EVM-105 is used to evaluate the TPS2378 IEEE 802.3at Type 2 compliant powered device (PD) controller. - What are the input voltage ranges for the TPS2378EVM-105?
The input voltage ranges from 0 V to 57 V. - What is the maximum operating current of the TPS2378?
The maximum operating current is up to 1 A typical. - Does the TPS2378 support auxiliary power adapters?
Yes, it features an auxiliary power detect (APD) input for priority to external power adapters. - What is the inrush current limit of the TPS2378?
The inrush current limit is between 100 mA and 180 mA. - What type of Ethernet interface does the TPS2378 support?
The TPS2378 supports a Gigabit Ethernet pass through interface. - What are some common applications of the TPS2378?
Common applications include video and VoIP telephones, multiband access points, security cameras, and pico-base stations. - How does the TPS2378 handle fault protection?
The TPS2378 features auto-retry fault protection. - What is the purpose of the CDB pin on the TPS2378?
The CDB pin is used to enable or disable the DC-DC converter. - Does the TPS2378 have any visual indicators?
Yes, it includes LEDs for type 2 PSE indication and power-good output.
