特性 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.