Overview
The TPS2378EVM-602 is an evaluation module designed by Texas Instruments to facilitate the evaluation of a dual TPS2378 forced four-pair Universal Power over Ethernet (UPOE) compliant application. This module provides a comprehensive setup for testing and validating the performance of the TPS2378 power device in various high-power PoE scenarios. It includes input and output power connectors, an array of onboard test points, and detailed circuitry for evaluation and reference purposes.
Key Specifications
| Parameter | Condition | MIN | TYP | MAX | Unit |
|---|---|---|---|---|---|
| Input Voltage | Applied to the power pins of connectors J1 or J3 | 42.5 | 57 | 57 | V |
| Operating Voltage | After start up | 30 | 57 | 57 | V |
| Input UVLO, POE input J1 | Rising input voltage | 40 | V | ||
| Input UVLO, POE input J1 | Falling input voltage | 30 | V | ||
| Detection voltage | at device terminals | 1.4 | 10.1 | 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 | ||
| Output Voltage | 42.5 ≤ VIN ≤ 57 V, ILOAD ≤ ILOAD (max) | 19.01 | 19.04 | 19.07 | V |
| Output Current | 42.5 ≤ VIN ≤ 57 V | 2.9 | A | ||
| Output ripple voltage, pk-to-pk | VIN = 48 V, ILOAD = 2.9 A | 225 | mV | ||
| Efficiency, dc-dc converter | VIN = 48 V, ILOAD = 2.9 A | 93% | % | ||
| Efficiency, end-to-end | VIN = 48 V, ILOAD = 2.9 A | 90% | % | ||
| Switching frequency | 225 | 270 | kHz |
Key Features
- Excellent efficiency driven by a synchronous flyback design.
- Forced four-pair UPOE compliant.
- 19 V at 2.3 A DC output (capable of up to 2.9 A).
- Includes input and output power connectors and an array of onboard test points for circuit evaluation.
- Optional load delay circuit for evaluating resistive loads during startup.
- Comprehensive layout guidelines for EMI/ESD containment and power flow optimization.
Applications
- Universal power over ethernet (UPOE) compliant devices.
- Video and VoIP telephones.
- Multiband access points.
- Security cameras.
- Pico-base stations.
Q & A
- What is the TPS2378EVM-602 evaluation module used for?
The TPS2378EVM-602 is used for evaluating a dual TPS2378 forced four-pair UPOE compliant application.
- What is the input voltage range for the TPS2378EVM-602?
The input voltage range is from 42.5 V to 57 V.
- What is the output voltage and current of the TPS2378EVM-602?
The output voltage is 19 V, and the output current is up to 2.9 A.
- What are the key features of the TPS2378EVM-602?
Key features include excellent efficiency, forced four-pair UPOE compliance, and a 19 V at 2.3 A DC output.
- How do you set up the TPS2378EVM-602 for testing?
The setup involves connecting the TPS2378EVM-602 to a power source or a PSE like the TPS23861EVM-612 using a CAT5E cable, and varying the load as necessary for test purposes.
- What is the purpose of the load delay circuit in the TPS2378EVM-602?
The load delay circuit is used to delay connecting the resistive load during startup to accommodate the PSE's inrush time.
- How do you disable the load delay circuit?
The load delay circuit can be disabled by shunting J11.
- What are the efficiency levels of the TPS2378EVM-602?
The dc-dc converter efficiency is 93%, and the end-to-end efficiency is 90% at VIN = 48 V and ILOAD = 2.9 A.
- What are the recommended layout guidelines for the TPS2378EVM-602?
The guidelines include following power and EMI/ESD best practices, such as short leads, wide power traces, and proper spacing and grounding.
- What types of devices can the TPS2378EVM-602 be used with?
It can be used with UPOE compliant devices, video and VoIP telephones, multiband access points, security cameras, and pico-base stations.
