Product Overview: LM5072MH-50 Power Over Ethernet Controller

The LM5072MH-50 is a highly integrated Power over Ethernet (PoE) powered device interface and pulse width modulation (PWM) controller provided by Texas Instruments. This advanced product is designed to extract power from a conventional twisted pair Category 5 Ethernet cable, conforming to the IEEE 802.3af Power-over-Ethernet standard.

The LM5072MH-50 integrates a signature resistor, a classification current source, an under-voltage lockout (UVLO), a switching regulator, and an 80-V 100-mA MOSFET into a single package. This level of integration facilitates the design of high-performance applications with minimal external components, saving both board space and system costs.

The device operates over a wide input voltage range of 9V to 57V and can deliver an output power up to 13W, making it suitable for a variety of powered devices. Its internal 100-mA MOSFET allows it to support high power applications efficiently. The LM5072MH-50 offers a programmable oscillator frequency, allowing designers to optimize the trade-off between efficiency and external component size.

The LM5072MH-50's thermal performance is enhanced by the PowerPAD™ package, which provides excellent heat dissipation. The device also includes numerous protection features such as over-temperature protection, over-voltage protection, and programmable under-voltage lockout, ensuring reliable operation under various conditions.

Key features of the LM5072MH-50 include:

• Integrated IEEE 802.3af-compliant PoE interface and PWM controller
• Supports a wide range of input voltages (9V to 57V)
• Integrated 80-V 100-mA MOSFET
• Programmable frequency and duty cycle
• Advanced protection features for enhanced reliability
• PowerPAD™ package for superior thermal performance

The LM5072MH-50 is an ideal solution for a variety of applications, including VoIP phones, RFID readers, industrial control equipment, and wireless network access points, where reliable power sourcing is essential.

For detailed technical specifications, application circuits, and additional information, designers are encouraged to consult the datasheet and Texas Instruments' technical support resources.