MAX5931HEEP+T

Product Overview

• Category: Integrated Circuit (IC)
• Use: Power Management
• Characteristics: High-Efficiency, Programmable Current Limiting, Thermal Shutdown Protection
• Package: 20-TQFN-EP (4x4)
• Essence: Power-over-Ethernet (PoE) Controller
• Packaging/Quantity: Tape & Reel (3000 pieces 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 94%
• Quiescent Current: 100µA (typical)

Detailed Pin Configuration

The MAX5931HEEP+T has a 20-pin TQFN-EP package with the following pin configuration:

1. VDD: Power Supply Input
2. GND: Ground
3. EN: Enable Pin
4. FLT: Fault Indicator Output
5. ILIM: Current Limit Programming Pin
6. VREF: Reference Voltage Output
7. FB: Feedback Pin
8. SS: Soft-Start Pin
9. PGND: Power Ground
10. VCC: Internal Regulator Output
11. VOUT: Output Voltage
12. BST: Bootstrap Capacitor Connection
13. LX: Switch Node
14. AGND: Analog Ground
15. NC: No Connect
16. NC: No Connect
17. NC: No Connect
18. NC: No Connect
19. NC: No Connect
20. NC: No Connect

Functional Features

• Power-over-Ethernet (PoE) controller for IEEE 802.3af/at-compliant devices
• Programmable current limit for power management
• Thermal shutdown protection to prevent overheating
• Soft-start feature for controlled startup
• Fault indicator output for system monitoring

Advantages and Disadvantages

Advantages: - High efficiency, reducing power consumption - Programmable current limiting for flexible power management - Thermal shutdown protection ensures safe operation - Small package size saves board space - Fault indicator output aids in system diagnostics

Disadvantages: - Limited maximum output current (600mA) - Operating temperature range may not be suitable for extreme environments

Working Principles

The MAX5931HEEP+T is designed to provide power-over-Ethernet functionality for IEEE 802.3af/at-compliant devices. It operates by receiving power from an Ethernet cable and converting it into a regulated output voltage. The device incorporates a programmable current limit feature, allowing the user to set the maximum current that can be drawn from the power source.

The controller also includes thermal shutdown protection, which activates when the device's temperature exceeds a certain threshold. This prevents overheating and protects the circuitry from damage. Additionally, the soft-start feature ensures a controlled startup, minimizing inrush current.

Detailed Application Field Plans

The MAX5931HEEP+T is commonly used in various applications requiring Power-over-Ethernet functionality. Some of the typical application fields include:

1. IP Cameras: The controller can power and regulate the voltage for IP cameras, enabling them to transmit data and receive power through a single Ethernet cable.
2. Wireless Access Points: It can be used to provide power to wireless access points, simplifying installation and reducing cable clutter.
3. VoIP Phones: The device enables VoIP phones to receive power and connect to the network using a single Ethernet cable.
4. Network Switches: It can be integrated into network switches to provide PoE capabilities for connected devices.

Detailed and Complete Alternative Models

1. MAX5932HEEP+T: Similar to the MAX5931HEEP+T, but with a higher maximum output current of 800mA.
2. MAX5933HEEP+T: PoE controller with an integrated DC-DC converter for applications requiring higher output voltages.
3. MAX5934HEEP+T: Power-over-Ethernet controller with additional features such as power-good indicator and adjustable undervoltage lockout.

These alternative models offer similar functionality to the MAX5931HEEP+T but may have different specifications or additional features to suit specific application requirements.

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