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Freescale unveils its first PoE/PD controller

Posted: 12 Oct 2006 ?? ?Print Version ?Bookmark and Share

Keywords:IEEE 802.3af? MCZ34670? Freescale? PoE controller? PoE controllers?

The MCZ34670 device from Freescale is the company's first single-chip PoE controller. It combines a powered device (PD) interface port supporting the IEEE 802.3af PoE standard and a pulse width modulator controller.

"The demand for VoIP and wireless access points is creating a significantly larger market opportunity for PoE-capable products," said Arman Naghavi, vice president and general manager of the Analog, Mixed-Signal & Power Division. "Freescale's integrated PoE controller is designed to enable new types of Ethernet end devices to connect to the Ethernet network and receive power safely, efficiently and cost effectively."

Featuring an integrated high-performance switching regulator, the MCZ34670 is designed to drive an external power MOSFET. Switching frequency is adjustable between 100kHz and 400kHz with a 50 percent duty-cycle limit. The MCZ34670 provides comprehensive signature detection and power classification functions. The chip also incorporates thermal protection circuitry.

The MCZ34670 is available in production quantities at a suggested resale price of $2.08 in 10,000-piece quantities. Suggested product pricing is less than $2 in high volume. MCZ34670 evaluation boards are available for a suggested resale price of $115. The KIT34670EGEVBE development tool incorporates an IEEE 802.3af compliant powered device interface with a 5V isolated output voltage and adjustable UVLO, as well as inrush current. In addition, the M52235EVB ColdFire architecture evaluation board, for the MCF5223x family of processors, has a suggested resale price of $299.

- Vince Biancomano

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