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PoE-PD supports 40W applications

Posted: 19 Nov 2008 ?? ?Print Version ?Bookmark and Share

Keywords:PD 40W applications? PoE? Ethernet?


ON Semiconductor has announced the availability of the NCP1082 and NCP1083, two new members of its Power over Ethernet (PoE) product family.

The NCP1083 joins the NCP1081 as one of the industry's high power integrated PoE power device (PoE-PD) supporting extended power ranges up to 40W of regulated power delivered to the application load in a 2-pair configuration. Both NCP1082 and NCP1083 fully support the IEEE 802.3af standard. Typical applications targeted by NCP1082 and NCP1083 include VoIP phones, wireless access points, industrial Ethernet I/O modules, programmable logic controllers (PLCs), pan-tilt-zoom (PTZ) and dome security cameras, and other applications that require an auxiliary supply.

The NCP1082/3 support normal PoE operation when power is available on the Ethernet cable. In the event Ethernet power is not available, the device accepts an auxiliary supply input to power the application. This approach eliminates the need for a second DC/DC converter and therefore drastically reduces the bill of materials. The new devices support a wide range of external input voltages from 9V to 57V.

ON Semiconductor's integrated NCP1082/3 PoE-PD devices are pin-compatible with the company's existing NCP1080/1 PoE-PD devices in the TSSOP-EP 20 pin package to allow customers to easily mix-and-match different PoE capabilities on different platforms.

The NCP1082/3 leverages ON Semiconductor's automotive qualified high-voltage SmartPower process to provide superior cable ESD and surge protection levels compared to other integrated PD and DC-DC converter controllers. Low on-resistance (Ron) and extended temperature range from -40C to 85C with full operation up to 150C junction temperature allows the NCP1082/3 to achieve record power levels while operating in harsh environments.

"The auxiliary supply capability facilitates the transition from traditional power sources to Power over Ethernet that enables a broad range of applications" said Koen Geirnaert, ON Semiconductor's PoE-PD product marketing manager.

The devices' integrated DC-DC converter controller facilitates the implementation of popular and proven single-ended power supply topologies such as fly-back, buck and forward converters for both configurations and uses a control scheme based on peak current control. The controllers have all the features needed for a flexible, robust and highly efficient design, including programmable frequency, slope compensation and soft startup.

The NCP1082/3 are currently available at $1.48 for NCP1082 and $1.85 for NCP1083 for 1,000 units and above. NCP1083 evaluation boards are available for $150.

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