The LTC4265 is a third generation power supply device (PD) interface controller for IEEE 802.3at high Power Power over Ethernet (PoE) applications up to 25.5W. The space-saving low size (4mm x 3mm) DFN package is available and compatible with LTC4264. By supporting the 1-event and 2-event class signaling defined by IEEE 802.3.
Typical Application
The LTC4265 is available in a wide range of product configurations. A 100V MOSFET isolates the DC/DC converter during detection and classification and provides a 100mA inrush current for a smooth power-on transition. The LTC4265 also includes complementary power output, onboard signature resistor, undervoltage/overvoltage locking and comprehensive thermal protection.
All Linear technology PD solutions include a closing pin with signature damage to provide flexible auxiliary power options. The LTC4265 PD Interface controller can be used with a variety of DC/DC converter products to provide a complete, cost-effective power solution for high-power PD applications.
Block diagram
