Technology Industry
Industry: Email Alert RSS FeedSingle-chip, PoE device controller for low-voltage auxiliary power sources.(Leading Off)
ECN-Electronic Component News, February, 2006
National Semiconductor Corporation has announced a Powered Device (PD) interface and DC-DC converter IC specifically designed for Power over Ethernet (PoE) devices that operate from alternative power sources or the PoE-enabled network. The single-chip, IEEE 802.3af-compliant PD interface port and pulse-width modulator (PWM) controller is specifically designed to accept power from external AC adapters. The LM5071 integrates a PD front end that accepts power from the PSE or auxiliary power to a single chip with a DC-DC controller that steps down the input voltage to power various PD loads. It features a maximum input voltage of 80V, user-programmable oscillator frequency up to 1 MHz and over-temperature protection, plus a voltage reference and high-performance error...
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