Datasheet Summary
Application Note: SY56805A1
PoE Power Device
General Description
The SY56805A1 is a co mbined Power over Ethernet (Po E) powered device (PD) interface and primary side converter optimized specifically for isolated converter designs. The Po E interface supports the IEEE 802.3af standard as a 13W Type 1 powered device.
To achieve higher efficiency and better EMI performance, SY56805A 1 drives Flyback converters in the Quasi-Resonant mode and adaptive PWM/PFM control. The flyback converter integrate a 150V, 0.14Ω MOSFET.
SY56805A 1 Features a detection signature pin which can also be used to disable the internal hotswap MOSFET. This allo ws the PoE function to be turned off during powered...