STMicroelectronics introduce PM8800A: integrated PoE power devices interface and PWM controller

The PM8800A is the first of a family of devices targeting standard PoE and higher power, power devices. The PM8800A combines a standard IEEE 802.3af interface, a current-mode PWM controller and a best-in-class hot-swap MOSFET in a single package. It also integrates the signature resistor, so minimizing the external component count.

Designed in a 100 V capable technology, the PM8800A features programmable inrush and DC current up to 800 mA (twice today’s PoE limit) for applications requiring power greater than 15 W.

Housed in a HTSSOP16 package for better thermal performance, the PM8800A also allows simple and robust design of power devices with power from auxiliary sources.

Features

• IEEE 802.3af compliant power device interface
  Works with power supplied from Ethernet LAN cables
  from local auxiliary sources
• Integrated 100 V, 0.5 Ω, 800 mA hot-swap MOSFET
• Integrated signature resistor
• Programmable in-rush current limit
• Power good indication
• Programmable DC current limit up to 800 mA
• High-voltage start-up bias regulator
• Thermal shutdown protection
• Current-mode pulse width modulator
• Integrated error amplifier and voltage reference
• Programmable oscillator frequency
• 80 % maximum duty cycle with internal slope compensation
• Supports both isolated and non-isolated applications

Main applications

• VoIP phones
• WLAN access points
• Security cameras
• PoE power device appliances
• High power (>12.95 W) power devices

Click here to view ST's product flyer in PDF format.

For more information, or details on the full range of STMicroelectronics products available from Anglia, please call +44 (0)1945 474747 or email info@anglia.com

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