On Semiconductor expands PoE range

On Semiconductor has announced the availability of the NCP1080 and NCP1081, two new members of its Power over Ethernet (PoE) product family.

The NCP1081 is a high power integrated Power over Ethernet Powered Device (PoE-PD) supporting extended power ranges up to 40W of regulated power delivered to the application load in a two-pair configuration.

Both devices fully support the IEEE 802.3af standard, while the NCP1081 enables the latest approved IEEE 802.3at draft (D3.0) standard including two event physical layer classification.

Typical applications targeted by NCP1080 and NCP1081 include VoIP phones, wireless access points, industrial Ethernet devices, pan-tilt-zoom (PTZ) and dome IP cameras, RFID base station and Wimax modems.

Supplied in a TSSOP-EP20 package measuring 4.4mm x 6.5mm, the pin-compatible NCP1080/1 combines an enhanced PoE-PD interface and a DC-DC converter controller in a single chip.

These integrated products are claimed to reduce bill-of-materials (BOM) counts by up to 67 per cent compared to other two-chip solutions.

The NCP1081 eliminates the need for local power adaptors or power supplies, reducing overall installation and maintenance costs.

The NCP1080/1 uses On Semiconductor's automotive-qualified, high-voltage Smartpower process to provide high cable ESD and surge protection levels compared to other integrated PD and DC-DC converter controllers.

Low on-resistance (Ron) and extended temperature range allows the NCP1080/1 to achieve high power levels while operating in harsh environments.

The NCP1080/1 also takes advantage of new and emerging power sourcing equipment (PSE).

The devices support an adjustable under-voltage lockout mechanism, offer an integrated classification loop and allow for external programming of key parameters.

Over-temperature protection and a two event physical layer classification indicator are standard features on the NCP1081.

The integrated DC-DC converter controllers facilitate the implementation of proven single-ended power supply topologies such as fly-back, buck and forward converters.

They use a control scheme based on peak current control.

Features of the controllers include programmable frequency, slope compensation and soft startup.

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