Datasheets

Microsemi’s PD69108 Power over Ethernet (PoE) Manager integrates power, analog and state of the art logic into a single 48 pin, plastic QFN package. The device is used in Ethernet switches and Midspans, enabling network devices to share power and data over the same cable. The PD69108 device is an 8 ports, mixed-signal, high-voltage PoE driver. It enables detection of IEEE802.3at-2009 compliant Type 1 and Type 2 PDs (Powered Devices), ensuring safe power feeding and disconnection of ports with full digital control and a minimum of external components. The PD69108 executes all real time functions as specified in the IEEE802.3af-2003 (“AF”) and IEEE802.3at-2009 High Power (“AT”) standards, including load detection and “AF” and “AT” classification. In addition, the PD69108 features Multiple Classification Attempts (MCA) port status monitoring, and provides system level activities such as power management and MIB support for system management. The PoE device is designed to detect and disable disconnected ports utilizing DC disconnection methods, as specified in the IEEE 802.3af-2003 and IEEE802.3at-2009 standards. The unit provides PD protection such as over-load, under-load, over-voltage and short-circuiting. It supports supply voltages ranging from 44 to 57 VDC with no need for additional power supply sources. The chip includes built-in internal thermal protection. Optionally, the PD69108 can detect legacy/pre-standard PD devices. The PD69108 is a low power device using an internal MOSFET and an external 0.36 ? sense resistor.