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PM8800 Datasheet Integrated Ieee 802.3af Compliant Poe-pd Interface And Pwm Controller

Manufacturer: STMicroelectronics

Overview: PM8800 Integrated IEEE 802.3af pliant PoE-PD interface and PWM controller with support of external source Preliminary.

General Description

The PM8800 integrates a standard 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 interface incorporates all the functions required by the IEEE 802.3af including detection, classification, under-voltage lockout (UVLO) and in-rush current limitation.

PM8800 specifically targets PD with extended power requirement with respect to the limit imposed by the 802.3af standard, embedding a hot-swap MOSFET capable of sustaining twice the current of the 802.3af standard with a programmable DC current limit The integrated switching regulator of the PM8800 has been designed to work with power either form the Ethernet cable connection or from an external power source such as AC adapter.

Key Features

  • IEEE 802.3af compliant PD Interface.
  • Works with power supplied from Ethernet LAN cables or from local auxiliary sources.
  • Integrated 100V, 0. 5Ω, 800mA Hot-Swap MOSFET.
  • Integrated signature resistor.
  • Programmable in-rush current limit.
  • Programmable classification current.
  • Programmable DC current limit up to 800 mA.
  • High voltage start-up bias regulator.
  • Thermal Shutdown protection.
  • Current mode pulse width modulator.
  • Programmable Oscillator F.

More Datasheets from STMicroelectronics

Part Number Description
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PM8800 Distributor