
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:
About this Guide: Describes the objectives, audience, and organization.
Introduction: Provides an overview about evaluation board’s main functions,
features, physical characteristics and ordering information.
Physical Description: Provides explanation related to the physical
description (switches, jumpers, connectors).
Electrical Characteristics: Provides electrical characteristics of the
evaluation board.
Installation: Provides description of the installation process.
Test Data: Provides board test data information
Schematic: Provides board schematic diagram
List of Material: Provides board’s list of materials.
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
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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:
Integrates PWM
controller
IEEE802.3at Type 1
(IEEE802.3 af level)
IEEE802.3at Type 1
(IEEE802.3 af level)
2 x IEEE802.3at Type 2 (4 pair)
HDBaseT (95W)
2 x IEEE802.3at Type 2 (4 pair)
HDBaseT (95W)
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

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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:
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
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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
Mechanical dimensions in mm
165 x 57 x 16 mm (L x W x H)

Copyright © 2015 Microsemi Page 6 of 26
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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
RJ45 port for Data + Power In for PSE connection
Standard Barrel Jack used for 48V Wall Adapter. Wall
adapter connection will be automatically sensed and will
override the PSE power connected to J1.
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.
RJ45 port for Data pass – through output
Converter Input Rail Monitor – Used as a monitor for
DC-DC primary rail voltage.
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
Data and power input to powered device (PoE Master
Negative data port)
Data and power input to powered device (PoE Master
Positive data port)
Data and power input to powered device (PoE Master
Positive data port)

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PD70211EVB50FW-5
50W Isolated Forward Converter PD
Evaluation Board
Data and power input to powered device (PoE Master
Negative data port)
Isolated data pass-through to external monitoring
device.
Isolated data pass-through to external monitoring
device.
Isolated data pass-through to external monitoring
device.
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.
42V to 57V input from wall adapter.

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PD70211EVB50FW-5
50W Isolated Forward Converter PD
Evaluation Board
3. V
out
Connections
See Figure 4.
Table 4: Output Load Connections
Return of DCDC output voltage
Positive DCDC output voltage
Return of DCDC output voltage
Positive DCDC output voltage
Figure 4: V
out
Connections

Copyright © 2015 Microsemi Page 9 of 26
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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

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PD70211EVB50FW-5
50W Isolated Forward Converter PD
Evaluation Board
4 Electrical Characteristics
Evaluation board’s electrical characteristics are described below:
Table 5: Electrical Characteristics
Main DC
Supply –
J1, VIN+,
VINRTN
Wall
Adapter
Supply –
J2, VIN+,
VINRTN
Maximum
Available
Current
Port
Isolation to
Chassis
*After start-up, the minimum voltage is 37V with load ≤ 13W per IEEE specification.

Copyright © 2015 Microsemi Page 11 of 26
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One Enterprise Aliso Viejo, CA 92656 USA
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.
5.2 Initial Configuration
Note: It is important to verify evaluation board is setup as shown in Figure 6 prior to starting any operation.
1. Connect load to evaluation board (J3 -1 (+) & J3 – 2 (-), or TP17 (+) & TP16 (-)).
2. Connect a Cat5 cable from PSE to Evaluation Board (J1), or a 48V Wall Adapter to Evaluation Board (J2).
Note: Wall Adapter will override power from PSE.
Electronic Load
Power
Cable
DC output
PSE or 42V to 57V
Power Supply
Power +
Data Input
Cat5 cable
48V Wall
Adapter
Data Output

Copyright © 2015 Microsemi Page 12 of 26
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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
Figure 7: Efficiency vs Input Voltage
80.0%
82.0%
84.0%
86.0%
88.0%
90.0%
92.0%
94.0%
96.0%
98.0%
100.0%
40 42 44 46 48 50 52 54 56 58 60
Efficiency
Input Voltage
50W Efficiency vs. Input Voltage

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PD70211EVB50FW-5
50W Isolated Forward Converter PD
Evaluation Board
6.2 Efficiency vs. Load Current at 48V Input to the PD70224
Figure 8: Efficiency at 48V Input
6.3 Load Regulation
Figure 9: Load Regulation at 48V Input
0.0%
10.0%
20.0%
30.0%
40.0%
50.0%
60.0%
70.0%
80.0%
90.0%
100.0%
0 2 4 6 8 10 12
Efficiency
Output Current
Efficiency vs. Load
-2.00%
-1.50%
-1.00%
-0.50%
0.00%
0.50%
1.00%
1.50%
2.00%
0 2 4 6 8 10 12
Regulation
Output Current
Load Regulation

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PD70211EVB50FW-5
50W Isolated Forward Converter PD
Evaluation Board
6.4 Output Ripple
Figure 10: Full Load Voltage Ripple and Noise at 42V Input

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PD70211EVB50FW-5
50W Isolated Forward Converter PD
Evaluation Board
-180
-135
-90
-45
0
45
90
135
180
-60
-40
-20
0
20
40
60
10 100 1000 10000 100000
Bode Plot VIN = 42V +25°C
Gain
Phase
-180
-135
-90
-45
0
45
90
135
180
-60
-40
-20
0
20
40
60
10 100 1000 10000 100000
Bode Plot VIN = 57V +25°C
Gain
Phase

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One Enterprise Aliso Viejo, CA 92656 USA
PD70211EVB50FW-5
50W Isolated Forward Converter PD
Evaluation Board
6.6 Step Load Response
Figure 11: Load Step Response

Copyright © 2015 Microsemi Page 17 of 26
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PD70211EVB50FW-5
50W Isolated Forward Converter PD
Evaluation Board
7 Schematic
Figure 12: Evaluation Board Schematic (1 of 2)
Data4
Data5
Data7
Data2
Data3
Data6
Data1
DATA OUT
R60
75
PD-0805
PD-0805-W
R61 75
R62 75
R63 75
Term4
Term2
Term1
Term2
Term1
Term3
Term4
Term3
Power_Spare+
Power_Data+
Power_Spare-
J1
08261X1TGH-F
RJ45-16P_TRANS_LED
Shield21
21
Shield22
22
Led1_C
17
Led1_A
18
TRD1+
11
TRCT1
12
TRD1-
10
TRD2+
4
TRCT2
6
TRD2-
5
TRD3+
3
TRCT3
1
TRD3-
2
TRD4+
8
TRCT4
7
TRD4-
9
VC1
13
Led2_1
19
Led2_2
20
VC2
14
VC3
15
VC4
16
Power_Data-
POWER + DATA INPUT
U1
PD70224ILQ-TR.
OUTP_1
1
OUTP_2
2
OUTP_3
3
IN2B_5
5
IN2B_6
6
IN2B_7
7
IN2B_8
8
OUTN_10
10
OUTN_11
11
OUTN_12
12
IN2A_1313IN2A_1414SUPP_SA16SUPP_SB17IN1A_1919IN1A_20
20
OUTP_32
32
OUTP_31
31
OUTP_30
30
IN1B_28
28
IN1B_27
27
IN1B_26
26
IN1B_25
25
OUTN_23
23
OUTN_22
22
OUTN_21
21
EX_OUTP
41
IN2A_4040IN2A_3939IN1A_3434IN1A_33
33
EX_OUTN
42
NC_37
37
WA_EN
36
VPN_IN
12345678
J4
RJ45-I
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
10
D4
SMAJ58CA-13-F
PD-SMA
Power_Data+
Data3
Data4
Data1
Data2
Data6
Data7
Data8
Data5
D24
SMAJ58CA-13-F
PD-SMA
C27
1n 2000V
C152
1n 2000V
C39
1n 2000V
C153
1n 2000V
VIN+
VPN_IN
C37
10nf
C2
1nF
100V
X7R
PD-0603
C16
1nF
100V
X7R
PD-0603
SA
SB
C32
100n
100V
X7R
PD-1206
R37
2K
PD-0603
J2
RAPC712X
SWITCHCRAFT-RAPC722
2
3
1
VPN_IN
VIN+
WA_ENWA_EN_PD
D10
PD-SMB
B2100-13-F
2 1
Q8
ZVP3310FTA
PD-SOT23
2
1
3
D28
SMAJ58A
2 1
Q16 FDS86242
PD-SO8
4
3 8
7
6
5
2
1
R39
11K
0805
R90
4.02K
C165
10U
25V
X7R
R92
150K
R94
13K
R95
13K
R42
150K
WA_EN_R
C36
1uF
25V
X7R
PD-0805
WA_EN
Data8

Copyright © 2015 Microsemi Page 18 of 26
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One Enterprise Aliso Viejo, CA 92656 USA
PD70211EVB50FW-5
50W Isolated Forward Converter PD
Evaluation Board
Figure 13: Evaluation Board Schematic (2 of 2)
C11
22uF
10V
X5R
C24
PD-0603
N.C
SG
Vaux
GD1
TP5
1
VAUX_VCC
L3
4.7MH[4700uH}
IND-D5-SMD
1 2
TP6
1
+ C9
47uF
100
ALU
D8H15F3_5
VAUX_VCC
4P_AT_FLAG
C14
100n
16V
AT_FLAG
Q10
BSS123
PD-SOT23
2
1
3
VIN+
U4
TLVH432AIDBZR
PD-SOT23
13
2
R52
100K
PD-0603
R51
100
PD-0603
HYST
VAUX_VCC
C17
100n
100V
X7R
U5
FAN3111CSX
PD-SOT23-5
VDD
1
VIN+3VIN-
4
GND
2
VOUT
5
C31
1uF
25V
X7R
PD-0805
C151
1u
25V
X7R
PD-1206
R67
2.2 PD -1210 C155
2200pF
50V
X7R
+ C10
820uF
6.3V
ALU
Vaux
GD2
R41
0
PD-0805
R9
0 PD -0603
L1
4.7uH
1 2
C40
1uF
25V
X7R
PD-0805
R12
0.039mOhm
PD-1206
1
VPN_IN
C25
1uF
16V
X7R
R29
100K
PD-0603
5v0
D7
BAT54SLT1G
PD-SOT23
132
VR1
MMSZ4702
PD-SOD123
2 1
VIN+
C23
50V
47n
X7Rpd-0603
VL
C19
10V1u
VL
1
1
1
R27
100K
PD-0603
R69
40.2
PD-1206
C156
56pF
100V
NPO
pd-0805
pd-0805-w
HD_FLAG
4P_AT_FLAG
AT_FLAG
4P_HD_FLAG
R24
1.2K
PD-0603
CSN
CSP
R7 0
HYST
R13 0
PD-0805
R3
24.9K
PD-0805
R18
60.4K
PD-0603
R21
30.9
pd-0603
1
R30 43.2KPD-0603
R33
562K
pd-0603
R36
18.7K
PD-0603
R34
562K
pd-0603
VIN+
R20
14.7K
PD-0603
C33
0.1uF
25V
X7R
PD-0603
R28
4.87kOhms
PD-0603
C12
100nF
50V
VL
Q2
FDMS86252
PD-POWER_56
4
3 8
765
2
1
9
Q3
FDMS7698
PD-POWER_56
S1
1
S2
2
S3
3
GATE
4
D1
8
D2
7
D3
6
D4
5
HS
9
C21
22n
25V
X7R
PD-0603
U3
FOD817ASD
PD-SMD-4
1234
R23
20K
PD-0603
R19
20K
PD-0603
C20
1n2000V
Q1
BSC0902NSI
PD-TDSON8
S1
1
S2
2
S3
3
GATE
4
D1
8
D2
7
D3
6
D4
5
HS
9
R31 100KPD-0603
R25 0PD-0603
U2
PD70211ILQ-TR.
PD-QFN36-6X6
SUPP_S1
1
SUPP_S2
2
4P_AT_FLAG
3
RREF
4
RCLASS
5
HD_FLAG
6
AT_FLAG
7
VPN_IN8
8
VPN_IN9
9
VPN_OUT1010VPN_OUT1111ENABLE12VINS13HYST14SYNC15RFREQ16SS17RCLP
18
PGND
27
SG
26
VL
25
GND
24
FB
23
DAO
22
COMP
21
VSP
20
VSN
19
RDET
36
VPP
35
4P_HD_FLAG
34
WA_EN
33
VCC/VAUX
32VH31PG30
CSP
29
CSN
28
Trm_P
37
C7
2.2uF
100V
X7R
PD-1210
C5
2.2uF
100V
X7R
PD-1210
C6
2.2uF
100V
X7R
PD-1210
L2
4.7uH
COIL-24X21
2
1
SG
C8
100n
X7R
PD-0805
C3
2.2uF
100V
X7R
PD-1210
R68
0
PD-0603
Vaux
C4
2.2uF
100V
X7R
PD-1210
D25
MBR0540T1G
PD-SOD123
N.C
21
CSP
PG
R11
100
PD-0603
VR3
PD-SOD123
2 1
C154
10pF
50V
NPO
PD-0805
R64
1K
PD-0805
CSN
GD1
FREEWHL_DR AIN
R65
10K
PD-0805
C28
22n
200V
X7R
PD-0805
GD2
FW_DRAIN
C18
1nF
16V
X7R
PD-0603
R55
100K
PD-0603
VR2
MMSZ4705T1G
PD-SOD123
2 1
D17
MMBD4148
PD-SOT23
1 3
2
R66
10
PD-0603
Q15
MMBT2222A_NL
PD-SOT23
1
2 3
D22
MMBD4148
PD-SOT23
1 3
2
R15 100
PD-0603
R4
22.1
PD-0603
DRAIN
D1
SMAJ40A
PD-SMA
21
R38
1K
PD-1206
R26
0 PD-0603
D2
ES1C-13-F
2 1
R8 10K
R10 10K
FREEWHL_DR AIN
C34
22uF
25V
X7R
PD-1210
Q14
IRF6216TRPBF
PD-SO8
SA
SB
D6
1N4148W-7-F
PD-SOD123
PD-SOD123-w
21
D21
1N4148W-7-F
PD-SOD123
2 1
VPN_IN
FW_DRAIN
4P_HD_FLAG
VIN+
HD_FLAG
R16
510Ohms
PD-0603
C22
4.7NF
16V
X7R
PD-0603
D23
SMAJ20CA-13-F
PD-SMA
R47
30.1K
PD-1206
PD-1206-W
VISUAL (LED) STATUS INDICATION
WA_EN_PD
R14 20
PD-0603
D16
SSC-GR101
Super Green
EVERLIGHT-19-21YGC
21
D14
SSC-GR101
Super Green
EVERLIGHT-19-21YGC
21
D15
SSC-GR101
Super Green
EVERLIGHT-19-21YGC
21
D20
SSC-GR101
Super Green
EVERLIGHT-19-21YGC
21
D19
SSC-GR101
Super Green
EVERLIGHT-19-21YGC
21
TP3
1
TP2
1
5v0
TP1
1
GND-F
4P_HD
1
HD_FLAG
1
DRAIN
4P_AT
1
AT_FLAG
1
VINRTN
1
T1
N/A
EFD25-12-PIN-SMD
1
5
2
3
7
8
4
6
9
10
11
12
R49
5.11K
PD-1206
R58
5.11K
PD-1206
R48
5.11K
PD-1206
Vaux
R57
5.11K
PD-1206
C29
PD-0805
200V
X7R
22n
C30
PD-0805
200V
X7R
22n
J3
1
1
2
2
VIN+
1
C35
100nF
50V
X7R
PD-0603
TP4
1
R22
PD-0603
N.C
D12
BAV99W
2 1
3
R50
PD-0603
N.C

Copyright © 2015 Microsemi Page 19 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
CAP CRM 100nF 100V 10%^^X7R 603
SMT
CAP CER 2.2UF 100V 10% X7R 1210
CAP CER 0.1UF 100V 10% X7R 0805
CAP ALUM 47UF 100V 20% RADIAL
CAP ALUM 820UF 6.3V 20% RADIAL
Capacitor, Ceramic, 50V, X7R, 0603
Capacitor, Ceramic, 10V, X7R, 0805
CAP CRM 100nF 100V 10%^^X7R
1206 SMT
Capacitor, Ceramic, X7R, 16V, 0603
Capacitor, Ceramic, 10V, X7R, 0805
CAP CRM 1nF/2000V 10% X7R 1206
SMT
Capacitor, X7R, 10V, 10% 0603
Capacitor, Ceramic, 10V, X7R, 0603
Capacitor, X7R, 25V, 10% 0603
Capacitor, X7R, 10V, 10% 0603
CAP CER 1UF 16V 10% X7R 0805
CAP CER 0.022UF 200V 10% X7R 0805
CAP CER 1UF 25V 10% X7R 0805
Capacitor, Ceramic, 25V, X7R, 0603
Capacitor, Ceramic, 25V, X7R, 1210
CAP CER 0.1UF 100V 10% X7R 0603
CAP CRM 1uF 25V 10% X7R1206
Capacitor, Ceramic, 100V 10% X7R
0603
CAP CRM 10pF 50V 10% X7R 0805
SMT
Capacitor, Ceramic, 50V, X7R, 1206

Copyright © 2015 Microsemi Page 20 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
Capacitor, X7R, 10uF, 25V, 20% 1210
TVS DIODE 40VWM 64.5VC SMA
TVS DIODE 58VWM 93.6VC SMA
DIODE SCHOTTKY 100V 0.2A SOD123
DIODE SCHOTTKY 30V 200MA SOT23
DIODE SCHOTTKY 100V 2A SMB
DIODE SML SIG 100V 0.2A SOT23-3
TVS DIODE 20VWM 32.4VC SMA
LED GREEN RECT CLEAR 0603
CONN MAGJACK 1PORT 1000 BASE-T
TERMINAL BLOCK 5MM 2POS PCB
CON RJ45 SINGLE 8 POS. SHIELDED
FIXED IND 4.7UH 5.5A 40 MOHM SMD
FIXED IND 4.7UH 16.8A 4.5 MOHM
FIXED IND 4.7MH 40MA 48 OHM SMD
MOSFET N-CH 30V 100A 8TDSON
MOSFET N-CH 150V 16A POWER 56
MOSFET N-CH 30V 13.5A POWER56
MOSFET P-CH 100V 75MA SOT23-3
TRANSISTOR GP NPN 80V SOT-223
MOSFET N-CH 100V 170MA SOT-23
MOSFET P-CH 150V 2.2A 8-SOIC
TRANS NPN 40V 0.6A SMD SOT23-3

Copyright © 2015 Microsemi Page 21 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
N-CH POWER MOSFET 150v 4.1A SO8
Resistor, 1%, 1/10W, 0805
Resistor, 5%, 1/10W, 0603
Resistor, 5%, 1/10W, 0603
Resistor, 1%, 1/16W, 0603
R9 0 Resistor, 1%, 1/16W, 0603
Resistor, 1%, 1/16W, 0603
RES SMD 0.043 OHM 1% 1/2W 1206
Resistor, 5%, 1/10W, 0603
Resistor, 5%, 1/10W, 0603
Resistor, 60.4K Ohms, 1/16 Watt, 1%
0603 Type SMD
Resistor, 5%, 1/10W, 0603
Resistor, 1%, 1/16W, 0603
Resistor, 30.9 Ohms, 1/16 Watt, 1%
0603 Type SMD
Resistor, 5%, 1/10W, 0603
Resistor, 5%, 1/10W, 0603
R27,R29,
R31,R45,
R52,R55
Resistor, 5%, 1/10W, 0603
Resistor, 1%, 1/16W, 0603
Resistor, 1%, 1/16W, 0603
Resistor, 1%, 1/10W, 0805
Resistor, 1%, 1/16W, 0603
Resistor, 1%, 1/16W, 0603
Resistor, 5%, 1/10W, 0603
Resistor, 1K Ohms, 1/4 Watt, 5% 1206
Type SMD
RES 11K 250 mW 1% 1206 SMT MTL
FLM

Copyright © 2015 Microsemi Page 22 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
R41 0 Resistor, 5%, 1/10W, 0805 SMD
RES 150K 250 mW 1% 1206 SMT MTL
FLM
Resistor, 5%, 1/10W, 0603
Resistor, 1%, 1/16W, 0603
Resistor, 1%, 1/16W, 0603
RES TK FLM 20K 250mW 1%1206
Resistor, 5%, 1/10W, 0603
Resistor, 1%, 1/10W, 0805
Resistor, 5%, 1/10W, 0603
Resistor, 1%, 1/16W, 0603
Resistor, 1%, 1/16W, 0603
RES TK FLM 20K 250mW 1%1206
Resistor, 5%, 1/10W, 0603
Resistor, 1%, 1/10W, 0805
Resistor, 5%, 1/10W, 0603
Resistor, 5%, 1/10W, 0603
Resistor, 4.02K, 1%, 1/16W 0603
Resistor, 13K, 1%, 1/16W 0603

Copyright © 2015 Microsemi Page 23 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
Terminal, miniature style test point, SMT
PCB Mount
4P_HD,4P_
AT,
HD_FLAG,
AT_FLAG
TEST POINT PC MINIATURE SMT
5V 50W
5V 50W Transformer, EFD25, SMD 12
IC, Power Over Ethernet PD Controller
OPTOCOUPLER TRANS 5KVRMS
4SMD
IC VREF SHUNT PREC ADJ SOT-23-3
IC GATE DVR SGL 1A EXTER SOT23-5
Terminal, Compact style test point, SMT
PCB Mount
DIODE ZENER 15V 500MW SOD123
DIODE ZENER 18V 500MW SOD123
DIODE ZENER 12V 500MW SOD123

Copyright © 2015 Microsemi Page 24 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
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.
Figure 14: Top Silk and Solder Mask
Figure 15: Bottom Silk and Solder Mask

Copyright © 2015 Microsemi Page 25 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 16: Top Layer
Figure 17: Bottom layer

Copyright © 2015 Microsemi Page 26 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
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PROPRIETARY AND CONFIDENTIAL information of Microsemi and cannot be copied, published, uploaded,
posted, transmitted, distributed or disclosed or used without the express duly signed written consent of Microsemi.
If the recipient of this document has entered into a disclosure agreement with Microsemi, then the terms of such
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must be approved by Microsemi in writing signed by an officer of Microsemi.
Microsemi reserves the right to change the configuration, functionality and performance of its products at any time
without any notice. This product has been subject to limited testing and should not be used in conjunction with lifesupport or other mission-critical equipment or applications. Microsemi assumes no liability whatsoever, and
Microsemi disclaims any express or implied warranty, relating to sale and/or use of Microsemi products including
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copyright or other intellectual property right. Any performance specifications believed to be reliable but are not
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specifications or parameters provided by Microsemi. It is the customer’s and user’s responsibility to independently
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Revision History
Updated schematic, BOM and board layout
© 2015 Microsemi Corp.
All rights reserved.
For support contact: PoEsupport@microsemi.com
Visit our web site at: www.microsemi.com Catalog Number: PD70211EVB50FW-5_UG_EVB