The PD69101 is a sophisticated single-ended mixed-signal, high-voltage Power over Ethernet (PoE) driver designed by Microsemi. It works in conjunction with Ethernet switches and network devices to deliver both power and data over the same cable, supporting both IEEE802.3af-2003 compliant Powered Devices (PDs) and IEEE802.3at high-power equipment. With a DC input voltage range of 44 to 57 volts, it also integrates a 3.3V DC regulator and operates within a temperature range of -40°C to +85°C, featuring over-temperature protection, voltage monitoring, and protection mechanisms. This device introduces advanced functionality for detecting and managing PoE-enabled devices while maintaining operational safety and efficiency.
Microsemi's PD69101 is a single-port, mixed-signal, high-voltage PoE driver. It is specifically designed to work within Ethernet switches, enabling network devices to share power and data through the same cable. The device ensures the detection of IEEE802.3af-2003 compliant PDs and IEEE802.3at high-power devices, providing secure power delivery and disconnection via fully digital control and minimal external components. By combining power, analog, and cutting-edge logic, the PD69101 is housed in a compact 24-pin, plastic QFN package.
A true "plug and play" solution, the PD69101 executes all real-time functions as per the IEEE802.3af-2003 ("AF") and IEEE802.3at High Power ("AT") standards. This includes load detection, "AF" and "AT" classification, and multiple classification attempts (MCA).
Key features of the PD69101 include:
• Detection and disabling of disconnected ports using DC disconnection methods, as per the IEEE 802.3af-2003 and IEEE802.3ar-2009 standards.
• Ability to identify legacy or pre-standard PD devices.
• Comprehensive PD protection, including overloads, underloads, overvoltages, over-temperature conditions, and short circuits.
• Support for supply voltages between 44V and 57VDC without requiring additional power supplies.
• Low power consumption, utilizing an internal 0.3Ω MOSFET and an external 0.5Ω sense resistor.
• Integrated thermal protection.
• Dual LEDs for indicating port status and distinguishing between AF/AT types.
Main features of the PD69101:
• Fully compliant with IEEE802.3af-2003 and IEEE802.3at-2009 standards.
• Supports two-event classification.
• Pre-standard PD detection capability.
• Compatibility with Cisco devices.
• Single DC voltage input (44-57VDC).
• Dual pair and quad pair support (data and spare power).
• Out-of-range VMAIN protection.
• Wide operating temperature range (-40°C to +85°C).
• Over-temperature protection.
• Low thermal dissipation (0.5Ω sense resistor).
• On/off command pin.
• Direct LED driving.
• Continuous port monitoring and system data reporting.
• Configurable load current settings.
• Configurable AT/AF modes.
• Configurable standard and legacy detection modes.
• Power soft-start mechanism.
• On-chip thermal protection.
• Voltage monitoring and protection.
• Built-in 3.3VDC regulator.
• Internal power-on reset.
• RoHS compliance.
• Low Rds(on) FET: 0.3Ω.
This product represents a significant advancement in PoE technology, offering reliability, flexibility, and compatibility with a wide array of network devices. Its compact design and robust feature set make it an ideal choice for modern network applications.
[Attached is a diagram illustrating the block diagram and typical application circuit for both 2-pair and 4-pair configurations.]
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