LM5070SDX-80/NOPB

Product Overview

Category: Integrated Circuit (IC)

Use: Power over Ethernet (PoE) Controller

Characteristics: - High-efficiency synchronous flyback controller - Supports IEEE 802.3af/at/bt standards - Provides power to remote devices over Ethernet cables - Suitable for various PoE applications

Package: SDX-80 (8-pin WSON package)

Essence: The LM5070SDX-80/NOPB is a highly efficient PoE controller that enables the delivery of power to remote devices over Ethernet cables.

Packaging/Quantity: The LM5070SDX-80/NOPB is available in a small 8-pin WSON package. It is typically sold in reels containing a specified quantity.

Specifications

• Input Voltage Range: 36V to 57V
• Output Voltage Range: 3.3V to 57V
• Maximum Output Power: 90W
• Operating Temperature Range: -40°C to +125°C
• Efficiency: Up to 95%
• Control Method: Current Mode Control
• Protection Features: Overload, Overvoltage, and Overtemperature Protection

Pin Configuration

The LM5070SDX-80/NOPB features the following pin configuration:

1. VDD: Power supply input
2. GND: Ground reference
3. FB: Feedback pin for output voltage regulation
4. EN: Enable pin to control device operation
5. RT: Timing resistor connection for frequency adjustment
6. CT: Timing capacitor connection for frequency adjustment
7. DRV: Gate driver output for external MOSFET
8. VIN: Input voltage connection

Functional Features

• Supports various PoE standards (IEEE 802.3af/at/bt)
• Provides accurate and stable output voltage regulation
• Enables high-efficiency power conversion
• Offers comprehensive protection features for safe operation
• Compact and easy-to-use design

Advantages and Disadvantages

Advantages: - High efficiency results in reduced power dissipation - Wide input and output voltage range for versatile applications - Comprehensive protection features ensure device safety - Compact package size allows for space-saving designs

Disadvantages: - Limited maximum output power compared to some other PoE controllers - Requires external MOSFET for power switching

Working Principles

The LM5070SDX-80/NOPB operates based on the current mode control method. It regulates the output voltage by adjusting the duty cycle of the power switch. The controller monitors the feedback voltage and adjusts the duty cycle accordingly to maintain a stable output voltage. It also incorporates various protection features to safeguard against overload, overvoltage, and overtemperature conditions.

Detailed Application Field Plans

The LM5070SDX-80/NOPB is suitable for a wide range of Power over Ethernet applications, including but not limited to: - IP cameras and surveillance systems - Wireless access points - VoIP phones - Network switches - Industrial automation equipment - IoT devices

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the LM5070SDX-80/NOPB include: - TPS23753PWPR - LTC4267CGN#PBF - MAX5942AESA+ - SI3404DV-T1-E3

These alternative models can be considered based on specific application requirements and design constraints.

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