Features
 IEEE802.3af and IEEE802.3at
Compliant
 Support for 4-pair Applications of up to
47.7W With a Single IC
 Two-events Classification
Identification With a Level Signal
Indicating Type 1 or Type 2 PSE
 Less Than 10 μA (typical) Offset
Current During Detection
 Signature Resistor is Disconnected
upon Detection
 Programmable Classification Setting
With a Single Resistor
 Integrated 0.6 Ohm Isolating MOSFET
Switch With Inrush Current Limit
 Power Off DC-DC Input Capacitor
Discharge
 100 kHz to 500 kHz Adjustable DC-DC
Switching Frequency
 DC-DC Frequency Can Be
Synchronized to External Clock
 Supports Low Power Mode Operation
for Higher Efficiency 50% Maximum
Duty Cycle
 Soft-start Circuit to Control The Output
Voltage Rise Time
 Two out-of-phase driver stages for
efficient synchronous rectification or
active clamp
 PoE Port Input UVLO with
Programmable Threshold and
Hysteresis
 Internal Differential Amplifier
Simplifying Non-isolated Step Down
Converter
 Over Load and Short Circuit Protection
 RoHS Compliant & Pb-Free

Applications
 IEEE802.3at and IEEE802.3af
powered devices such as IP
phones, WLAN Access Points and
Network Cameras.
 48V Input Telcom/Networks Hot
Swappable Power Supply.