MCZ34670EGR2 Integrated Circuits (ICs)

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MCZ34670EGR2 Application Field and Working Principle

MCZ34670EGR2 is a Power-over-Ethernet (PoE) system controller developed by Microchip Technology. It is a highly integrated controller capable of leveraging up to four Class 5 PoE physical layer devices and creating the necessary power and data paths needed to support full power applications on the network, while still providing the intelligence and flexibility to guarantee backward compatibility with legacy IEEE 802.3af and IEEE 802.3at powered devices (PDs).

PoE controllers are used in many different electronic applications, ranging from automotive to industrial. Due to its wide range of applications, different features have been developed for different designs. With the MCZ34670EGR2, engineers can quickly and easily add PoE compatibility to their design and benefit from increased network reliability, reduced cost, and a simpler architecture.

Features and Benefits of the MCZ34670EGR2

• Supports up to four PDs connected via Fast Fourier Transform (FFT) Ethernet (EFT) cables
• Programmable an inrush current limitation to protect against power surge
• Using two sampling points to detect current level for per port
• Built-in overload and overtemperature protection
• Automatically detects and acknowledges PDs
• On-chip temperature and power monitoring

Working Principle

The working principle of the MCZ34670EGR2 is based on the IEEE 802.3AF/802.3AT PoE standards. The device first supplies a minimum power to detect remote power device (PD), then begins to provide the PD with enough voltage and current in order to power it up. All four ports can be enabled/disabled or individually adjusted to it’s maximum output. During operation, the MCZ34670EGR2 keeps measuring the current in each port to ascertain the power consumption of the PD, and will deactivate the port when the power drain exceeds its capability.

In addition to power management, the MCZ34670EGR2 also offers protective features to secure the circuitry of connected PDs. An inrush current limitation is available to restrict the peak power surge, while an overload and overtemperature protection prevent avoid excess power and heat. Moreover, the MCZ34670EGR2 performs automatic monitoring of temperature and power supply, allowing for more accurate control of the internal components.

Applications

• Industrial Ethernet networks
• Industrial IoT and automation
• Medical imaging devices
• Building automation systems
• Network surveillance systems
• Access control and security systems
• Wireless broadband systems
• Electric vehicle charging systems
• Cameras, routers and other home automation devices

Conclusion

The MCZ34670EGR2 is a highly integrated controller that simplifies the design of PoE-compliant products by providing the necessary power and data paths needed to support full power applications. With its advanced features such as inrush current limitation and overload protection, engineers can quickly and easily add PoE compatibility to their designs and benefit from increased network reliability, reduced cost, and a more efficient architecture.

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