LM5071MT-80/NOPB

Product Overview

Category

The LM5071MT-80/NOPB belongs to the category of integrated circuits (ICs) specifically designed for power management applications.

Use

This product is primarily used in power over Ethernet (PoE) systems, where it enables the transmission of both data and power over a single Ethernet cable. It provides a convenient solution for powering various devices such as IP cameras, wireless access points, and VoIP phones.

Characteristics

• High efficiency: The LM5071MT-80/NOPB offers high efficiency power conversion, minimizing energy losses during the power transfer process.
• Wide input voltage range: It can handle input voltages ranging from 36V to 57V, making it compatible with different PoE standards.
• Robust protection features: This IC incorporates various protection mechanisms, including overcurrent protection, thermal shutdown, and under-voltage lockout, ensuring safe and reliable operation.
• Compact package: The LM5071MT-80/NOPB is available in a small surface-mount package, allowing for space-efficient integration into PoE-enabled devices.
• RoHS compliant: It meets the Restriction of Hazardous Substances directive, making it environmentally friendly.

Package and Quantity

The LM5071MT-80/NOPB is packaged in a thermally enhanced 20-pin TSSOP (Thin Shrink Small Outline Package). It is typically sold in reels containing 250 units per reel.

Specifications

• Input Voltage Range: 36V to 57V
• Output Voltage Range: 3.3V to 5V
• Maximum Output Current: 600mA
• Operating Temperature Range: -40°C to +85°C
• Efficiency: Up to 90%
• Quiescent Current: 100µA

Pin Configuration

The LM5071MT-80/NOPB features a 20-pin TSSOP package with the following pin configuration:

1. VDD
2. GND
3. EN
4. NC
5. NC
6. NC
7. NC
8. NC
9. NC
10. NC
11. NC
12. NC
13. NC
14. NC
15. NC
16. NC
17. NC
18. NC
19. NC
20. VOUT

Functional Features

• Power over Ethernet (PoE) compatibility: The LM5071MT-80/NOPB is designed to comply with various PoE standards, enabling seamless integration into PoE systems.
• Integrated power management: It incorporates a DC-DC converter and control circuitry, allowing for efficient power transfer from the Ethernet cable to the connected device.
• Fault protection: The IC includes built-in protection mechanisms to safeguard against overcurrent, overtemperature, and undervoltage conditions, ensuring system reliability.
• Soft-start functionality: The LM5071MT-80/NOPB features a soft-start function that gradually ramps up the output voltage, preventing excessive inrush current during startup.

Advantages and Disadvantages

Advantages

• High efficiency power conversion reduces energy losses.
• Wide input voltage range enables compatibility with different PoE standards.
• Compact package facilitates space-efficient integration.
• Robust protection features ensure safe and reliable operation.
• Soft-start functionality prevents excessive inrush current.

Disadvantages

• Limited maximum output current may not be suitable for high-power devices.
• Requires additional external components for complete PoE system implementation.

Working Principles

The LM5071MT-80/NOPB operates by receiving power from the Ethernet cable through the PoE interface. It then converts this power to the desired output voltage using an integrated DC-DC converter. The control circuitry ensures efficient power transfer and regulates the output voltage within the specified range. The IC also monitors various parameters, such as temperature and current, to provide fault protection and prevent damage to the connected device.

Application Field Plans

The LM5071MT-80/NOPB finds extensive application in various PoE-enabled devices, including:

1. IP Cameras: It provides a convenient solution for powering surveillance cameras over Ethernet cables, eliminating the need for separate power supplies.
2. Wireless Access Points: The IC enables seamless integration of power and data transmission in wireless networking equipment, simplifying installation and reducing clutter.
3. VoIP Phones: It allows for the delivery of both power and voice signals through a single Ethernet cable, enabling cost-effective deployment of VoIP phone systems.

Alternative Models

For those seeking alternative options, the following models offer similar functionality to the LM5071MT-80/NOPB:

1. TPS23753PWP
2. LTC4267CGN#PBF
3. MAX5941AESA

These alternatives can be considered based on specific requirements and compatibility with the intended application.

In conclusion,