Microsemi PD70211EVB50FW-5 User Manual
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Microsemi PD70211EVB50FW-5 User Manual

5v/50w isolated active clamp forward converter pd
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PD70211EVB50FW-5
50W Isolated Forward Converter PD

Evaluation Board

PD70211EVB50FW-5
5V/50W Isolated Active Clamp Forward Converter PD

Evaluation Board User Guide

Revision 2.0
PRODUCTION DATA – Information contained in this document is proprietary to
Microsemi and is current as of publication date. This document may not be
modified in any way without the express written consent of Microsemi. Product
processing does not necessarily include testing of all parameters. Microsemi
reserves the right to change the configuration and performance of the product and
to discontinue product at any time.

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Summary of Contents for Microsemi PD70211EVB50FW-5

  • Page 1: Evaluation Board

    Revision 2.0 PRODUCTION DATA – Information contained in this document is proprietary to Microsemi and is current as of publication date. This document may not be modified in any way without the express written consent of Microsemi. Product processing does not necessarily include testing of all parameters. Microsemi reserves the right to change the configuration and performance of the product and to discontinue product at any time.

  • Page 2: About This Guide

    Evaluation Board 1 About this Guide This user guide provides both description and operation procedures for Microsemi's PD70211EVB50FW evaluating board. This board is used for evaluating the performance of PD70211A PD controller with integrated switching regulator, and PD70224 Dual MOSFET – Based Bridge Rectifier.
  • Page 3 50W Isolated Forward Converter PD Evaluation Board 2 Introduction Microsemi’s PD70211ILQ device is part of a family of devices which are targeted for realizing the 802.3at standard PD interface. The PD interface family of devices includes the following: Device type...
  • Page 4 Evaluation Board Figure 2: PD70211EVB50FW Evaluation Board – General View Evaluation Boards Ordering Information Microsemi supplies the following Evaluation Board as shown below: Ordering Number Description 2 x IEEE802.3at Type 2 (4 pair) PD based on PD70211 device having 4 pair...

  • Page 5: Evaluation Board Features

    PD70211EVB50FW-5 50W Isolated Forward Converter PD Evaluation Board 2.1 Evaluation Board Features  Designed to support Data and Spare current by a single PD70211A device  Power is supplied through the 4-pairs of the Cat5 cable  Wall Adapter input – Standard Barrel Jack available for connecting to an external 48V Wall Adapter.

  • Page 6: Physical Description

    Evaluation Board 3 Physical Description 3.1 Package Contents Upon opening the Evaluation Board package, verify the following part is included. If it seems damaged, contact local representative or Microsemi's headquarters. Package content for standard shipments is:  PD70211EVB50FW Evaluation Board.
  • Page 7 PD70211EVB50FW-5 50W Isolated Forward Converter PD Evaluation Board J1 & J4 Pin No Signal Name Description Data and power input to powered device (PoE Master J1 - 7, 8 Data and Power In Negative data port) Isolated data pass-through to external monitoring...
  • Page 8 PD70211EVB50FW-5 50W Isolated Forward Converter PD Evaluation Board 3. V Connections See Figure 4. Table 4: Output Load Connections Pin No. Signal Name Description J3 - 2 Vout (-) Return of DCDC output voltage J3 - 1 Vout (+) Positive DCDC output voltage...
  • Page 9 PD70211EVB50FW-5 50W Isolated Forward Converter PD Evaluation Board 3.3 Indications The following sections provide general information regarding unit’s indications. 1. LED Indication See Figure 5. 3.3.1.1 LED Indication See Figure 5. D16 is the AT_FLAG indication LED, a PD70211 device output signal indicating the device has detected a 2 finger class event from the PSE side in the class stage.

  • Page 10: Electrical Characteristics

    PD70211EVB50FW-5 50W Isolated Forward Converter PD Evaluation Board 4 Electrical Characteristics Evaluation board’s electrical characteristics are described below: Table 5: Electrical Characteristics Parameter Main DC Supply – J1, VIN+, VINRTN Wall Adapter Supply – J2, VIN+, VINRTN Maximum Available Current...

  • Page 11: Installation

    PD70211EVB50FW-5 50W Isolated Forward Converter PD Evaluation Board 5 Installation 5.1 Preliminary Considerations and Safety Precautions  If using an external supply in place of a PSE, verify the external power supply is turned “off” before all peripheral devices are connected. Insure the external supply is connected to the RJ45 input (J1) per Table 3.
  • Page 12 PD70211EVB50FW-5 50W Isolated Forward Converter PD Evaluation Board 6 Test Data This chapter describes EVB test data under various loads and POE input voltage levels. The efficiency is indicated up to 50W output power.  Efficiency is measured at the input to the PD70224. It does not contain the RJ45 Connector or Magnetics 6.1 50W Efficiency vs Input Voltage to the PD70224...

  • Page 13: Efficiency Vs. Load

    PD70211EVB50FW-5 50W Isolated Forward Converter PD Evaluation Board 6.2 Efficiency vs. Load Current at 48V Input to the PD70224 Efficiency vs. Load 100.0% 90.0% 80.0% 70.0% 60.0% 50.0% 40.0% 30.0% 20.0% 10.0% 0.0% Output Current Figure 8: Efficiency at 48V Input 6.3 Load Regulation...

  • Page 14: Output Ripple

    PD70211EVB50FW-5 50W Isolated Forward Converter PD Evaluation Board 6.4 Output Ripple Figure 10: Full Load Voltage Ripple and Noise at 42V Input Microsemi Copyright © 2015 Page 14 of 26 CPG – PoE BU Rev. 2.0, 29-June-16 One Enterprise Aliso Viejo, CA 92656 USA...
  • Page 15 PD70211EVB50FW-5 50W Isolated Forward Converter PD Evaluation Board 6.5 Bode Plots Bode Plot VIN = 42V +25°C Gain Phase -135 -180 1000 10000 100000 Bandwidth: 4731 Hz Phase Margin: 82° Gain Margin: -28 dB Bode Plot VIN = 57V +25°C...

  • Page 16: Step Load Response

    PD70211EVB50FW-5 50W Isolated Forward Converter PD Evaluation Board Gain Margin: -28 dB 6.6 Step Load Response Load Current 2A/Div Output Voltage Figure 11: Load Step Response Microsemi Copyright © 2015 Page 16 of 26 CPG – PoE BU Rev. 2.0, 29-June-16...
  • Page 17 PD70211EVB50FW-5 50W Isolated Forward Converter PD Evaluation Board 7 Schematic VIN+ Power_Data+ 100V PD-0603 POWER + DATA INPUT 10nf PD70224ILQ-TR. Led1_C Led1_A Data1 TRD1+ OUTP_1 OUTP_32 Term1 TRCT1 OUTP_2 OUTP_31 Data2 TRD1- OUTP_3 OUTP_30 Data3 Power_Spare+ TRD2+ IN2B_5 IN1B_28 Term2...
  • Page 18 PD70211EVB50FW-5 50W Isolated Forward Converter PD Evaluation Board VIN+ COIL-24X21 VIN+ 4.7uH VIN+ 4.7uH SMAJ40A 2.2uF 2.2uF 2.2uF 2.2uF 2.2uF 100n 100V PD-SMA 100V 100V 100V 100V 47uF 820uF 100nF ES1C-13-F 6.3V PD-1210 PD-0805 VINRTN PD-1210 PD-1210 PD-1210 PD-1210 SMAJ20CA-13-F...

  • Page 19: List Of Materials

    PD70211EVB50FW-5 50W Isolated Forward Converter PD Evaluation Board 8 List of Materials Ref Des Part Value Description Mfr. Name Mfr. Part Number CAP CRM 100nF 100V 10%^^X7R 603 C2,C16 C3,C4, 2.2uF CAP CER 2.2UF 100V 10% X7R 1210 Taiyo Yuden...
  • Page 20 PD70211EVB50FW-5 50W Isolated Forward Converter PD Evaluation Board Ref Des Part Value Description Mfr. Name Mfr. Part Number GRM32DR71E106MA C165 10uF Capacitor, X7R, 10uF, 25V, 20% 1210 Murata 1SMAJ40A TVS DIODE 40VWM 64.5VC SMA Diodes Inc SMAJ40A-13-F ES1C DIO FAST SWI 150V, 1A...
  • Page 21 PD70211EVB50FW-5 50W Isolated Forward Converter PD Evaluation Board Ref Des Part Value Description Mfr. Name Mfr. Part Number FDS86242 N-CH POWER MOSFET 150v 4.1A SO8 Fairchild FDS86242 24.9K Resistor, 1%, 1/10W, 0805 Resistor, 5%, 1/10W, 0603 R7,R13, Resistor, 5%, 1/10W, 0603...
  • Page 22 PD70211EVB50FW-5 50W Isolated Forward Converter PD Evaluation Board Ref Des Part Value Description Mfr. Name Mfr. Part Number 2.2k Resistor, 5%, 1/4W, 1206 Resistor, 5%, 1/10W, 0805 SMD RES 150K 250 mW 1% 1206 SMT MTL R42, R92 150K Resistor, 5%, 1/10W, 0603...
  • Page 23 PD70211EVB50FW-5 50W Isolated Forward Converter PD Evaluation Board Ref Des Part Value Description Mfr. Name Mfr. Part Number TP1,TP2, Terminal, miniature style test point, SMT TP3,TP4, 5015 Keystone 5015 PCB Mount VIN+ 4P_HD,4P_ 5015 TEST POINT PC MINIATURE SMT Keystone...

  • Page 24: Board Layout

    PD70211EVB50FW-5 50W Isolated Forward Converter PD Evaluation Board 9 Board Layout This section presents the layout of the evaluation board. The board is a 4 layer board. All layers are 2 Oz layers. Below figures present the 4 copper layers and the silk of the board for tracking devices placements.
  • Page 25 PD70211EVB50FW-5 50W Isolated Forward Converter PD Evaluation Board Figure 16: Top Layer Figure 17: Bottom layer Microsemi Copyright © 2015 Page 25 of 26 CPG – PoE BU Rev.2.0, 29-June-16 One Enterprise, Aliso Viejo, CA 92656, USA...
  • Page 26 Microsemi. If the recipient of this document has entered into a disclosure agreement with Microsemi, then the terms of such Agreement will also apply. This document and the information contained herein may not be modified, by any person other than authorized personnel of Microsemi.

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