Microsemi PD70211EVB50FW-5 User manual

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.

Copyright © 2015 Microsemi Page 2 of 26
Rev. 2.0, 29-June-16 CPG –PoE BU
One Enterprise Aliso Viejo, CA 92656 USA
PD70211EVB50FW-5
50W Isolated Forward Converter PD
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.
PD70211ILQ device supports both the standard IEEE802.3at PD application interface, and a PWM controller that is
used to provide the PD operational voltage.
The evaluation board supports a 50 Watt, 5V output in its existing configuration, with no heat sink, at room
temperature.
1.1 Audience
This user guide is intended for qualified personnel, meaning operators and technicians who have a background in
basic concepts of electronics.
1.2 Organization
This guide is divided into several sections as follows:
Chapter 1
About this Guide: Describes the objectives, audience, and organization.
Chapter 2
Introduction: Provides an overview about evaluation board’s main functions,
features, physical characteristics and ordering information.
Chapter 3
Physical Description: Provides explanation related to the physical
description (switches, jumpers, connectors).
Chapter 4
Electrical Characteristics: Provides electrical characteristics of the
evaluation board.
Chapter 5
Installation: Provides description of the installation process.
Chapter 6
Test Data: Provides board test data information
Chapter 7
Schematic: Provides board schematic diagram
Chapter 8
List of Material: Provides board’s list of materials.
Chapter 9
Board Layout: Provides board Gerber files description for all layers..
1.3 Reference Documents
PD70211 datasheet, catalogue number DS_PD70211
PD70224 datasheet, catalogue number DS_PD70224

Copyright © 2015 Microsemi Page 3 of 26
Rev. 2.0, 29-June-16 CPG –PoE BU
One Enterprise Aliso Viejo, CA 92656 USA
PD70211EVB50FW-5
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
Power capability
Integrates PWM
controller
PD70100
IEEE802.3at Type 1
(IEEE802.3 af level)
No
PD70101
IEEE802.3at Type 1
(IEEE802.3 af level)
Yes
PD70200
IEEE802.3at Type 2
No
PD70201
IEEE802.3at Type 2
Yes
PD70210(A)
2 x IEEE802.3at Type 2 (4 pair)
HDBaseT (95W)
No
PD70211
2 x IEEE802.3at Type 2 (4 pair)
HDBaseT (95W)
Yes
Microsemi’s PD70211EVB50FW Evaluation Board (see
Figure 2) provides designers with an environment needed for evaluating the performance and implementation of
PD applications based on PD70211 controller.
The board is using a single PD controller, PD70211ILQ, to support the Detection, Class, and Power Supplying
phases on the 4 Pairs of the Cat5 cable. The board supports sync detection of the 4 pairs. PD70211ILQ supports
the current of the HDBaseT over 4 Pairs, which is more than twice the power of a standard IEEE802.3AT Type 2
interface.
All necessary steps and connection instructions required to install and operate this board are provided within this
document.
PD70211 Based
Vin to 24V
Flyback DCDC
Module
RJ45 Data +
Power
Combined RJ45 &
Pulse Transformer Vout Conn
PD70224
Active
Mosfet
Bridges
Vin
Combined
Vin 5V
PD70211 Based
Vin to 5V
Forward DCDC
Module
48V Wall
Adapter
Wall
Adapter
Detection
Data
Output
Figure 1: PD70211EVB50FW-5 Block Diagram

Copyright © 2015 Microsemi Page 4 of 26
Rev. 2.0, 29-June-16 CPG –PoE BU
One Enterprise Aliso Viejo, CA 92656 USA
PD70211EVB50FW-5
50W Isolated Forward Converter PD
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
PD70211EVB50FW-5
2 x IEEE802.3at Type 2 (4 pair) PD based on PD70211 device having 4 pair
supply, controlling an isolated Forward converter, having a 5V 10 Amp
output.

Copyright © 2015 Microsemi Page 5 of 26
Rev. 2.0, 29-June-16 CPG –PoE BU
One Enterprise Aliso Viejo, CA 92656 USA
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.
Data pass-through connector
On board PSE class type LED indicators
On board AT detected LED indicator
On board 4P_AT detected LED indicator
On board HD detected LED indicator
On board 4P_HD detected LED indicator
On board Power Good LED indicator which may be configured to monitor PD Front End or
VPP UVLO.
Ta: 0° to +70°C (with derating curve)
RoHS compliant
2.2 Physical Characteristics
Table 1 lists evaluation board’s physical characteristics.
Table 1: Physical Characteristics
Parameter
Value
Mechanical dimensions in mm
165 x 57 x 16 mm (L x W x H)

Copyright © 2015 Microsemi Page 6 of 26
Rev. 2.0, 29-June-16 CPG –PoE BU
One Enterprise Aliso Viejo, CA 92656 USA
PD70211EVB50FW-5
50W Isolated Forward Converter PD
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.
Wall Adapter Input Cable
3.2 Connectors
The following sections provide both general and detailed information regarding unit’s connectors.
3.2.1 Connectors Table
Table 2 lists the Evaluation Board's connectors.
Table 2: Connectors List
#
Connector
Name
Description
1
J1
RJ45 Connector
RJ45 port for Data + Power In for PSE connection
2
J2
Wall Adapter Input
Standard Barrel Jack used for 48V Wall Adapter. Wall
adapter connection will be automatically sensed and will
override the PSE power connected to J1.
3
J3, TP6 (-)
and TP5 (+)
Converter Output
Terminal pins for connecting a load to 5V output. J3
provides screw terminals for easy connection; TP5 and
TP6 provide solder pads for soldered connection.
4
J4
RJ45 Connector
RJ45 port for Data pass –through output
5
VIN+,
VINRTN
Converter Input
Monitor
Converter Input Rail Monitor –Used as a monitor for
DC-DC primary rail voltage.
6
TP1 and TP2
Frequency Analyzer
Connection
Used to connect to an external frequency response
analyzer for measuring loop stability.
3.2.2 Connectors Detailed Explanation
(The numbering is in reference to the numbers listed in Table 2.)
1. RJ45 Connectors.
See Figure 3. Table 3: RJ45 Connectors
J1 & J4 Pin No
Signal Name
Description
J1 - 1, 2
Data and Power In
Data and power input to powered device (PoE Master
Negative data port)
J1 - 3, 6
Data and Power In
Data and power input to powered device (PoE Master
Positive data port)
J1 - 4, 5
Data and Power In
Data and power input to powered device (PoE Master
Positive data port)

Copyright © 2015 Microsemi Page 7 of 26
Rev. 2.0, 29-June-16 CPG –PoE BU
One Enterprise Aliso Viejo, CA 92656 USA
PD70211EVB50FW-5
50W Isolated Forward Converter PD
Evaluation Board
J1 & J4 Pin No
Signal Name
Description
J1 - 7, 8
Data and Power In
Data and power input to powered device (PoE Master
Negative data port)
J4 - 1, 2
Data Output
Isolated data pass-through to external monitoring
device.
J4 - 3, 6
Data Output
Isolated data pass-through to external monitoring
device.
J4 - 4, 5
Data Output
Isolated data pass-through to external monitoring
device.
J4 - 7, 8
Data Output
Isolated data pass-through to external monitoring
device.
Figure 3: Front RJ45 and Auxiliary 48V Wall Adapter Connectors
2. Wall Adapter Connections
See Figure 3.
J2 Pin No
Signal Name
Description
Center Pin
VIN (+)
42V to 57V input from wall adapter.
Outer Barrel
VIN (-)
Wall Adapter Return

Copyright © 2015 Microsemi Page 8 of 26
Rev. 2.0, 29-June-16 CPG –PoE BU
One Enterprise Aliso Viejo, CA 92656 USA
PD70211EVB50FW-5
50W Isolated Forward Converter PD
Evaluation Board
3. Vout 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
TP6
Vout (-)
Return of DCDC output voltage
TP5
Vout (+)
Positive DCDC output voltage
Vout (+) Vout (-)
Figure 4: Vout Connections

Copyright © 2015 Microsemi Page 9 of 26
Rev. 2.0, 29-June-16 CPG –PoE BU
One Enterprise Aliso Viejo, CA 92656 USA
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. The flag will be operative at 3, 4, and 6 fingers detection as well.
D15 is the 4P_AT indication LED, a PD70211 device output signal indicating the device has detected a 4 finger
class event from the PSE side in the class stage, or a 2 finger class event from the PSE side in the class stage,
and SUPP_Sa and SUPP_Sb are both High.
The flag will be operative at 6 fingers detection as well.
D20 is the HD_FLAG indication LED, a PD70211 device output signal indicating the device has detected a 3 finger
class event from the PSE side in the class stage.
The flag will be operative at 6 fingers detection as well.
D19 is the 4P_HD indication LED, a PD70211 device output signal indicating the device has detected a 6 finger
class event from the PSE side in the class stage.
D14 is the Power Good indication. This LED indicates the presence of power. This indicator may be configured to
monitor PD Front End VAUX (Asserts when VPP = 36V min.; de-asserts when VPP = 31V min.), or it may be
configured to monitor the VPP UVLO, which is user selectable by the resistor values at VINS and HYST pins (R13,
R19, and R25). See the PD70211 datasheet for further details regarding setting VPP UVLO limits. EVB default for
Power Good EVB is monitoring VPP UVLO, and will track the operation of the DC-DC converter. To change Power
Good to monitor PD Front End VAUX:
1) Remove R51, 100 Ohm Resistor (located on PCB bottom under D10).
2) Add R50 Zero Ohm Jumper (Also located on PCB bottom under D10).
3) Insure that only R51 or R50 are installed; do not operate with both resistors installed.
Figure 5: LED Indications

Copyright © 2015 Microsemi Page 10 of 26
Rev. 2.0, 29-June-16 CPG –PoE BU
One Enterprise Aliso Viejo, CA 92656 USA
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
Min
Max
Main DC
Supply –
J1, VIN+,
VINRTN
42*
57
V
Wall
Adapter
Supply –
J2, VIN+,
VINRTN
42
57
V
Maximum
Available
Current
10
A
Port
Isolation to
Chassis
-
1.5
kVrms
*After start-up, the minimum voltage is 37V with load ≤ 13W per IEEE specification.