Microchip Technology Microsemi PD70201EVB-25F-D-5 User manual

PD70201EVB-25F-D-5
User Guide
25W Isolated Flyback Converter Evaluation Board
October 2019

Isolated Flyback Converter Evaluation Board
Microsemi Proprietary and Confidential. PD70201EVB-U-25F-5 User Guide Revision 1.0
Contents
1 Revision History ................................................................................................................................... 1
1.1 Revision 1.0...............................................................................................................................................1
2 Product Overview ................................................................................................................................ 2
2.1 Evaluation Board Features........................................................................................................................3
2.2 Evaluation Board Connectors....................................................................................................................3
2.2.1 RJ45 Connectors ............................................................................................................................................ 4
2.2.2 Output Connector ......................................................................................................................................... 4
2.3 PhysicalCharacteristics.............................................................................................................................5
2.4 ElectricalCharacteristics ...........................................................................................................................5
2.5 Typical Performance.................................................................................................................................6
2.5.1 Efficiency at full load (5A) ............................................................................................................................. 6
2.5.2 Efficiency vs load at 48V input ...................................................................................................................... 6
2.5.3 Load Regulation ............................................................................................................................................ 6
2.5.4 Step load response........................................................................................................................................ 7
3 Installation ........................................................................................................................................... 8
3.1 Initial Configuration ..................................................................................................................................8
4 Schematic ............................................................................................................................................ 9
5 Bill of Materials .................................................................................................................................. 10
6 Board Layout...................................................................................................................................... 13
7 Evaluation board ordering information ............................................................................................. 14

Isolated Flyback Converter Evaluation Board
Microsemi Proprietary and Confidential. PD70201EVB-U-25F-5 User Guide Revision 1.0
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1 Revision History
The revision history describes the changes that were implemented in the document. The changes are
listed by revision, starting with the most current publication.
1.1 Revision 1.0
Revision 1.0 was published in October 2019. It was the first publication of this document.

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Isolated Flyback Converter Evaluation Board
2 Product Overview
This document provides the description and operating procedures for Microsemi's reduced size 5V 25W
board PD70201EVB-25F-D-5. This board type is used for evaluating the performance of the PD70201
device, which contains both the standard 802.3at PD application interface, and a PWM controller.
Microsemi’s PD70201 device is part of a family of devices that support the IEEE 802.3af, 802.3at and
HDBT standards PD
interface.
The PD interface includes the following family of devices.
Table 1 •PD Family of Devices
Devicetype
Power Capability
Integrates PWM Controller
WA Priority
PD70100 IEEE 802.3at Type 1 (IEEE 802.3 af level) No No
PD70101 IEEE 802.3at Type 1 (IEEE 802.3 af level) Yes No
PD70200
IEEE 802.3at Type 2
No
No
PD70201
IEEE 802.3at Type 2
Yes
No
PD70210 IEEE 802.3at Type 2 No No
PD70210A IEEE 802.3at Type 2 No Yes
PD70211
IEEE 802.3at Type 2, HDBT
Yes
Yes
PD70224
IEEE 802.3at Type 2, HDBT
No
Yes
Microsemi’s PD70201EVB-25F-D-5 Evaluation Board provides designers with the environment needed
for evaluating the performance and implementation of PD applications based on the PD70201 device.
The board uses a single PD device (PD70201ILQ) to support the Detection, Classification, and Powering
phases on the 2/4 pairs of the Cat5 cable. PD70201ILQ supports a standard IEEE802.3at Type 2
interface as well as wide range non-standard input voltages.
This document provides all necessary procedures and instructions to install and operate this board.
Figure 1 •PD70201EVB-25F-D-5 Block Diagram
The board can be powered either by a PSE or a lab supply through RJ45 connector- see electrical
characteristics (page 7) for the input voltage range. The external load is connected
to evaluation board using output connector (J1) - refer to evaluation board picture (page 5) for the
location of input and output
connectors.
D9 is the AT flag indication LED, a PD70201 device output signal indicating that the device has detected
two fingers class, so the PSE side is AT level capable. This signal in the PD environment indicates that AT
power level is supported.

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The following image shows a top view of the evaluation board.
Figure 2 •PD70201EVB-25F-D-5 Evaluation Board – General View
2.1 Evaluation Board Features
Designed to support data and spare current by a single PD70201 device
Two RJ45 connectors (Data and Power Input, Data Output)
Output voltage connector
On board AT detected LED indicator
Pulse transformer for routing the data to PD application to enable full PD evaluation
Wide input voltage range
Evaluation Board working temperature: 0°C to 70°C
RoHS compliant
2.2 Evaluation Board Connectors
The evaluation board connectors are listed in the following table.
Table 2 •Connector Details
# Connector Name Description
1 J3 RJ45
Connector
2 J1 Output
connector
RJ45 port for Data and Power Input for PSE connection
Terminal blocks for connecting a load to output regulator

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2.2.1 RJ45 Connectors
The pinout of RJ45 input connector for power and data is described in the following table.
Table 3 •RJ45 Input Connector (J3)
CON1 Pin No Alternative
A (MDI-X)
Alternative
A (MDI)
Alternative
B (MDI-
X/MDI)
1 DATA - Vport_Neg DATA - Vport_Pos
2 DATA - Vport_Neg DATA - Vport_Pos
3 DATA - Vport_Pos DATA - Vport_Neg
4 SPARE - Vport_Pos
5 SPARE - Vport_Pos
6 DATA - Vport_Pos DATA - Vport_Neg
7 SPARE - Vport_Neg
8 SPARE - Vport_Neg
Manufacturer: Bel Stewart
Manufacturer part number: 08261X1TGH-F or equivalent
2.2.2 Output Connector
An external load is connected to the evaluation board using the output connector (J1). The pinout of the
output connector is described in the following table.
Table 4 •J1 Connector
Pin No.
Signal Name
Description
Pin 1 VOUT Positive DC/DC output voltage
Pin 2 VOUT_RTN Return of DC/DC output voltage
Manufacturer: Kaifeng Electronic
Manufacturer part number: KF350V-02P-14

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2.3 Physical Characteristics
The maximum mechanical dimensions of the board are 25.4mm x 21mm x 17mm (L x W x H).
2.4 Electrical Characteristics
Following are electrical characteristics of the evaluation board.
Table 5 •Electrical Characteristics
`Min Max Unit
Input – Con J3 36 57 V
Output voltage 4.8 5.25 V
Maximum Output Current
--
5
A
Port Isolation to Chassis -- 1.5 kVrms
Ambient temperature -40 +50 oC
Note: to operate evaluation board from +50 oC to +70 oC an external heatsink (not supplied) has to be attached
to the board via a thermally conductive conformal insulator (such as Bergquist GAP PAD p/n TGP 800VOS) by
using two mounting holes on the board.

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2.5 Typical Performance
2.5.1 Efficiency at full load (5A)
2.5.2 Efficiency vs load at 48V input
2.5.3 Load Regulation
Output voltage vs. load current
90.0%
90.5%
91.0%
91.5%
40 45 50 55 60
Input Voltage, V
Full Load Efficiency
vs. Input Voltage
84%
85%
86%
87%
88%
89%
90%
91%
92%
012345
Load curent (amps)
Efficiency at 48V vs. Load

Isolated Flyback Converter Evaluation Board
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2.5.4 Step load response
Output voltage response to continuous load transients from 2A to 5A
4.500
4.600
4.700
4.800
4.900
5.000
5.100
5.200
5.300
5.400
5.500
012345
Load Regulation
Load (amps)

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3 Installation
Ensure that the board's power source is turned OFF before all peripheral devices are connected.
3.1 Initial Configuration
Note: Prior to starting any operation, it is important to verify that the evaluation board is setup as
shown in the following figure.
Connect load to the board (using J1).
Connect a Cat5 cable from PSE or a DC power supply to evaluation board using input connector J3.
Figure 3 •Test Setup