Microchip Technology Microsemi PD70201EVB-25F-D-5 Manuale utente

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

Revision History ................................................................................................................................... 1

1.1

Revision 1.0...............................................................................................................................................1

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

Installation ........................................................................................................................................... 8

3.1

Initial Configuration ..................................................................................................................................8

Schematic ............................................................................................................................................ 9

Bill of Materials .................................................................................................................................. 10

Board Layout...................................................................................................................................... 13

Evaluation board ordering information ............................................................................................. 14

Isolated Flyback Converter Evaluation Board

Microsemi Proprietary and Confidential. PD70201EVB-U-25F-5 User Guide Revision 1.0

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.

Microsemi Proprietary and Confidential. PD70201EVB-U-25F-5 User Guide Revision 1.0

Isolated Flyback Converter Evaluation Board

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

PD70201

IEEE 802.3at Type 2

Yes

PD70210 IEEE 802.3at Type 2 No No

PD70210A IEEE 802.3at Type 2 No Yes

PD70211

IEEE 802.3at Type 2, HDBT

Yes

PD70224

IEEE 802.3at Type 2, HDBT

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

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.

Isolated Flyback Converter Evaluation Board

Microsemi Proprietary and Confidential. PD70201EVB25F-D-5 User Guide Revision v1.0

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

RJ45

Connector

J1 Output

connector

RJ45 port for Data and Power Input for PSE connection

Terminal blocks for connecting a load to output regulator

Isolated Flyback Converter Evaluation Board

Microsemi Proprietary and Confidential. PD70201EVB25F-D-5 User Guide Revision v1.0

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

(MDI-X)

Alternative

(MDI)

Alternative

B (MDI-

X/MDI)

DATA - Vport_Neg DATA - Vport_Pos

DATA - Vport_Pos DATA - Vport_Neg

SPARE - Vport_Pos

DATA - Vport_Pos DATA - Vport_Neg

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

Isolated Flyback Converter Evaluation Board

Microsemi Proprietary and Confidential. PD70201EVB25F-D-5 User Guide Revision v1.0

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

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.

Isolated Flyback Converter Evaluation Board

Microsemi Proprietary and Confidential. PD70201EVB25F-D-5 User Guide Revision v1.0

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

Microsemi Proprietary and Confidential. PD70201EVB25F-D-5 User Guide Revision v1.0

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)

Isolated Flyback Converter Evaluation Board

Microsemi Proprietary and Confidential. PD70201EVB25F-D-5 User Guide Revision v1.0

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

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