[PowerDsine] Description PowerDsine’s™ PD64012 Power over Ethernet (PoE) Manager chip integrates power, analog and logic functions into a single 64-pin, plastic pack. It is used in Ethernet switches and Midspans to allow next generation network devices to share power and data over the same cable. Features ♦ IEEE 802.3af-2003 compliant ♦ Drives 12 independent power ports ♦ Can be cascaded for up to 48 ports, using a master/slave architecture ♦ Supports IETF Power Ethernet MIB (RFC 3621) ♦ Thermal protection per port ♦ Thermal monitoring capabilities ♦ Multi-point resistor detection ♦ Supports DC modulation method under-current detection according to IEEE 802.3af-2003 ♦ AC & DC disconnect functions ♦ PD classification function ♦ Operates from single input (44 to 57 V) ♦ I2C bus interface ♦ Supports foldback current limiting ♦ Digitally programmable overcurrent protection per port ♦ Digitally programmable timers ♦ Power management algorithm for up to 48 ports ♦ Internal power-on reset ♦ Power soft-start algorithm ♦ Fast power shutdown, in case of power supply failure ♦ Automatic on/off sequencer for up to 48 ports ♦ Disable/enable power feeding ♦ Continuous port current monitoring ♦ Supports back-off feature for Midspan implementation ♦ Additional features for Enhanced mode: • UART interface • Pre-standard PD detection • Supports non-standard terminals • Advanced power management • Programmable port matrix
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