EPR-86 Datasheet, PDF (1/28 Pages) Power Integrations, Inc. – Engineering Prototype Report for EP 86 - 6.6 W Multi-Class Powered Device (PD) for Power over Ethernet (PoE) Using DPA-Switch-(DPA423G)

Title
Engineering Prototype Report for EP-86 –
6.6 W Multi-Class Powered Device (PD) for
Power over Ethernet (PoE) Using
DPA-Switch^® (DPA423G)
Specification Input: 33-57 VDC, Output: 3.3 V / 2.0 A
Application
PoE Class 2 PD – Including IEEE802.3af
Compliant Interface Circuit
Author
Power Integrations Applications Department
Document
Number
EPR-86
Date
April 13, 2006
Revision
1.1
Summary and Features
• Meets IEEE802.3af requirements according to University of New Hampshire
Interoperability Consortium (UNH-IOC) test results, for Class 1–3 PoE PDs
• DPA-Switch PWM controller with integrated 220 V power MOSFET switch
• Under-voltage (UV) and overvoltage (OV) shutdown functions
• Auto-recovering, hysteretic thermal shutdown
• Auto-restart function: protects against short-circuit and open loop faults
• No-load regulation achieved by cycle skipping
• Fully integrated soft-start minimizes start-up stress and overshoot
• Externally programmed I_LIMIT scales with V_IN for power limiting
• Lossless MOSFET current sense eliminates external sensing components
• Small footprint 3.1" × 1", low overall height 0.45" (excluding RJ-45 connector)
The products and applications illustrated herein (including circuits external to the products and transformer
construction) may be covered by one or more U.S. and foreign patents or potentially by pending U.S. and foreign
patent applications assigned to Power Integrations. A complete list of Power Integrations’ patents may be found at
www.powerint.com.
Power Integrations
5245 Hellyer Avenue, San Jose, CA 95138 USA.
Tel: [phone] Fax: [phone]
www.powerint.com