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PM8803

High-efficiency, IEEE 802.3at compliant integrated PoE-PD interface and PWM controller

Manufacturer:

Stmicroelectronics
Mfr.Part #:

PM8803
Datasheet:

PM8803 Datasheet (PDF)
ECCN US:

EAR99
ECCN EU:

NEC
Packing Type:

Tube
Grade:

Industrial
EDA/CAD Models:

Request Free CAD Models for PM8803

Email: [email protected]

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Tel: +852 95804164

PM8803 General Description

The PM8803 integrates a Power over Ethernet (PoE) interface and a current mode PWM controller to simplify the design of the power supply sections of all powered devices. The PoE/PoE+ interface includes all functions required by the IEEE 802.3at as well as detection, classification, undervoltage lockout (UVLO) and inrush current limitation.The PM8803 specifically performs IEEE802.3at Layer 1 hardware classification, providing the system with an indication of Type 2 PSE successful detection.The PM8803 has been designed to work with power either from the Ethernet cable or from an external power source such as a wall adapter, ensuring the priority of the auxiliary source over the PoE. The DC-DC section of the PM8803 features a programmable oscillator frequency, an adjustable slope compensation, dual complementary low-side drivers, programmable dead time and an internal temperature sensor.The PM8803 targets high-efficiency conversion under all load conditions supporting flyback, forward, forward with active clamp converters and synchronous rectification.5 V/4 A, synchronous flyback converter, Power Ov.3.3 V/6 A, synchronous flyback converter, Power .

Key Features

IEEE 802.3at compliant PD interface
Works with power supplied from Ethernet LAN cables or from local auxiliary sources
Successful IEEE802.3at Layer1 classification indicator
Integrated 100 V, 0.45 Ω, 1 A hot-swap MOSFET
Accurate 140 mA typ. inrush current level
Programmable classification current
Programmable DC current limit up to 1 A
Integrated high voltage start-up bias regulator
Thermal shutdown protection
Current mode pulse width modulator
Programmable oscillator frequency
80% maximum duty cycle with internal slope compensation
Support for flyback, forward, forward active clamp, flyback with synchronous rectification