Fairchild GreenBridge FDMQ8203, GreenBridge FDMS86200, GreenBridge FDMS8025S, GreenBridge FDMC2523P User Manual

Is Now Part of

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User Guide for

GreenBridge™ Evaluation Kit

for Power Over Ethernet 90 W Active

Clamp Forward DC-DC Converter

MLP 4.5x5 GreenBridge™

Power 33/56 Shielded Gate PowerTrench® MOSFET

Featured Fairchild Products:

FDMQ8203 FDMS86200 FDMS8025S

FDMC2523P

Direct questions or comments

about this evaluation board to:

“Worldwide Direct Support”

Fairchild Semiconductor.com

Table of Contents

1. Introduction ............................................................................................................................... 3

1.1. Description ......................................................................................................................3

2. General Evaluation Board Specifications ................................................................................. 4

3. Photographs............................................................................................................................... 5

4. Setup and Test Procedure .......................................................................................................... 6

4.1. Hardware Connector Description ....................................................................................6

5. Performance of Evaluation Board ............................................................................................. 7

6. Printed Circuit Board .............................................................................................................. 10

7. Schematic ................................................................................................................................ 11

8. Bill of Materials ...................................................................................................................... 13

9. Revision History ..................................................................................................................... 15

This user guide supports the evaluation kit for GreenBridge™ and shielded gate PowerTrench

(PoE). It should be used in conjunction with their datasheets as well as Fairchild’s application notes and technical support team. Please visit Fairchild’s website at

www.fairchildsemi.com

1. Introduction

This document describes the proposed solution for PoE++ PD that increases the delivering power up to 90 W. It is designed to rectify a polarity of DC voltage from Power Source Equipment (PSE) and then active clamp forward DC-DC converter steps down a nominal input voltage 48 V switching frequency. To deliver 90 W power through a network cable, the power system is composed with four-pair architecture, which PSE uses to deliver data and power to the PD through both the spare pair and data pair in the network cable at the same time.

1.1. Description

GreenBridge™ FDMQ8203 replaces the conventional diode bridge to reduce the power dissipation caused by the large voltage drop of a diode bridge, resulting in a lower power class power device. The small package size of MLP4.5x5 reduces PCB area and increases power density. FDMC86102 100 V shielded gate PowerTrench® MOSFET for the hot swap switch has the low conduction loss and the ruggedness due to the low R wide safe operating area (SOA). The FDMS86200 150 V shielded gate PowerTrench MOSFET reduces switching loss and conduction loss in the primary switch of the active clamp forward topology because it has low FOM (R shielded gate PowerTrench MOSFET is optimized for synchronous rectification because it has the low R

®

MOSFET applying to a Power Device (PD) of Power over Ethernet

.

to output voltage 3.3 V

IN

and outstanding body diode performance.

DS(on)

x Qg). The FDMS8025S 30 V

DS(on)

in 300 kHz of the

OUT

DS(on)

and

Figure 1. Power diagram

Table 1. MOSFET Parameters

Part Number Package Type BV

DSS

R

(V)

[mΩ]

DS(ON)

at 10 V

GS

Qg [nC]

at 10 VGS

C

[pF]

OSS

Max. Max. Max.

FDMQ8203 MLP 4.5x5

FDMC86102 POWER33 N-Ch 100 24 13 175

FDMS86200 POWER56 N-Ch 150 18 33 203

FDMC2523P POWER33 P-Ch -150 1500 9 80

FDMS8025S POWER56 N-Ch 30 2.8 34 815

N-Ch 100 110 5 55

P-Ch -80 190 19 65

2. General Evaluation Board Specifications

Table 2. Summary of Features and Performance

Description Value Remark

Input Voltage Range 42 ~ 57 VIN IEEE802.3 at Standard

Output Voltage Range 3.3 V

Switching Frequency 300 kHz Adjustable by R29 and R30, R31

Maximum Output Current 27 A Limited by Power Component

PCB Size 100x70 mm FR-4 / 4 Layers

PD Controller IEEE802.3 at PD Controller

PWM Controller Active Clamp Forward Controller

42V

>89%

IN

Efficiency

Temperature

48VIN >90%

57VIN >90%

FDMQ8203 58.4°C

FDMC86102 56.4°C

FDMS86200 74°C

FDMC2523P 65°C

FDMS8025S 88.6°C

Adjustable by R22 and R46

OUT

At Full Load (90 W)

At Full Load (25℃ Room Temperature)

3. Photographs

Figure 2. Top Side View of Evaluation Kit

Figure 3. Bottom Side View of Evaluation Kit

4. Setup and Test Procedure

Table 3. Test Point Descriptions

Test Point Label Descriptions

J6 AUX+ Measurement test point for positive AUX input voltage

J7 AUX- Measurement test point for negative AUX input voltage

J8 VIN+ Measurement test point for rectified positive input voltage

J9 VIN- Measurement test point for input voltage return

J10 +VOUT Measurement test point for output voltage

J11 -VOUT Measurement test point for output voltage return

4.1. Hardware Connector Description

The evaluation kit is fully assembled and tested. Follow the steps below to verify board operation.

1. Use one of the following methods to power the evaluation kit:

 If network connectivity is required:

Connect a network cable from the evaluation kit input port RJ45 connector to the corresponding PSE Ethernet LAN connection, which provides power to the evaluation kit such as PoE++ or four-fair architecture.

 If network connectivity is not required:

Connect a -48 V DC power supply between the TXCT and RXCT; and Connect a -48 V DC power supply between the MID+ and MID- together.

Caution: Do not turn on the power supply until all connections are completed.

2. Activate the PSE power supply or turn on the external DC power supply.

3. Using a voltmeter, verify that the evaluation kit provides +3.3 V across the +VOUT and –VOUT pins. –VOUT is isolated from the evaluation kit’s input VIN- and AUX- pins.

Figure 4. Test Setup

5. Performance of Evaluation Board

Figure 5 through Figure 9 show the measured efficiency and power loss on the evaluation board when operated under the conditions in Table 4. This board is optimized for

3.3 V

Table 4. Test Conditions

V

IN

42 ~ 57 V 3.3 V 300 kHz 0~27 A, 5 A Step, 3-minute soak time No

, 300 kHz fSW, and peak 27 A I

OUT

f

OUT

I

SW

specifications.

OUT

Cooling

OUT

Figure 5. Efficiency at V

Figure 6. Power Loss at V

=3.3 V, fSW=300 kHz, Soaking=3 Minutes, TA=25°C

OUT

=3.3 V, fSW=300 kHz, Soaking=3 Minutes, TA=25°C

OUT

Figure 7. Thermal Performance Comparison: GreenBridge™ vs. Diode Bridge

=3.3, fSW= 300 kHz, Soaking=3 Minutes, TA=25°C

at V

OUT

GreenBridge™ FDMQ8203: 58.4°C

Forward Primary FDMS86200: 74.0°C

Forward Secondary FDMS8025S: 88.6°C

Figure 8. Top-Side Thermal Data at VIN=48 V, V

=3.3 / I

Soaking=10 Minutes, T

OUT

= 27 A, fSW= 300 kHz,

OUT

=25°C

A

42 V

48 V

S210 Diode Bridge FDMQ8203 GreenBridge™

IN

89.6°C 63.0°C

IN

83.8°C 58.3°C

57 V

IN

77.0°C 55.2°C

Figure 9. Thermal Image Comparison: GreenBridge™ vs. Diode Bridge

V

OUT

=3.3 V, I

= 27 A, fSW=300 kHz, Soaking=3 Minutes, TA=25°C

OUT

6. Printed Circuit Board

PCB layout (100 mm x 70 mm, 4-Layer, FR-4).

Figure 10. SST (Top Side) Layer

Figure 12. TOP & SMT Layer Figure 13. BOT & SMB Layer

Figure 11. SSB (Bottom Side) Layer

Figure 14. INNER1 (POWER) Layer Figure 15. INNER2 (GND) Layer

7. Schematic

1

TRC T112TRD 1+

TRD 1-

10

4

BAS516

D4

D3

MM5Z10V

DZ4

DZ3

101112

9

12345

MM5Z10V

DZ2

BAS516

D2

BAS516

D7

MM5Z1 0V

DZ7

101112

12345

IN FROM PSE OUT TO PHY

11

5

6

Q4

BC846

R3

20K/1005

1nF/1005

C3

1234

8

Q1

FDMQ8203

67

C2

1nF/1005

123 4

R2

20K/1005

BC846

Q3

5

6

5

6

Q6

BC846

R7

20K/1005

1nF/1005

C7

1234

8

9

Q2

FDMQ8203

67

1000pF / 2KV

75Ohm X 4

7499511611A

R10

0

J2

TXCT

J3

RXCT

J4

MID +

J5

MID -

J12

SUPPORT

1

J13

SUPPORT

1

J14

SUPPORT

1

J15

SUPPORT

1

AUX-

J7

1

R12

20k

R14

49.9

R15

120

5

LT4275A

PWRGD

T2P

6

T2P

82k

R11

R13

0

IEEUVLO1AUX2RCLASS3RCLASS++4GND

U1

0.1uF/100 V C10

HSGATE

HSSRC

VPORT

R16

8.2

8

9

7

10

56nF/100V

PWRGD

FDMC86102

Q7

R17

3.3K

C11

12nF X 4

4

523

7

J1

21

SHIELD

22

SHIELD

20

Green_C

19

Orange_C

18

Yellow_A

17

Yellow_C

1

P48V

8

TRD 4-

RXCT

TXCT

MID+

MID-

13

15

16

9

14

AUX+

J6

1

D17 S310

TRC T47TRD 4+

6

TRC T3

TRD 3+3TRD 2+

TRC T2

TRD 3-

TRD 2-

2

5

1

6

8

R4

20K/1005

BAS516

1nF/1005

C4

MM5Z10V

16 15 14 13

MM5Z10V

DZ1

C1

1nF/1005

BAS516

D1

R1

20K/1005

R8

20K/1005

BAS516

1nF/1005

C8

D8

MM5Z1 0V

DZ8

16 15 14 13

Figure 16. GreenBridge™ & PD controller Block Schematic

MM5Z1 0V

DZ5

DZ6

+

C12

33uF/63V

VIN+

C5

1nF/1005

R5

20K/1005

BAS516

D6

D5

5

R9 20K/1005

D9 SMAJ58A

C9 NC

C6

1nF/1005

123 4

BC846

R6

20K/1005

Q5

6

P48V

R31

8.2k

R30

56k

75k

R29

C32

0.1u

C31

100p

68k

R27

910

R18

CS

8

RTDEL1RTON2RTOFF3VREF4SYNC5GND6CS7RSLOPE

UCC2891D

SS/SD

FB

9

C35

0.22u/100V

R43

1k

PWRGD

4

SFH690BT

U4

1

23

R40

NC

23

U3

TLV431

1

82n

R28

12k

C34

330p C24

U2

LINEUV

PGND

VDD

OUT

AUX

VIN

16

13

15

11

14

12

10

+

C22

47uF/16V

+

C23

47uF/16V

R42

27k

P_BIAS

R33

2k

R39

499

R22

820

NC

MMSZ5231B / 5.1Vz

Z1

1

2

C15 1uF

R24

10k

MMBT222 2A

0.1u C16

R46

16k

C17

NC

Q50

NC

C18

NC

CS

C14

10n

2.2

R41

2.2

FDMS86200

Q8

10u/35V C13

R23

499

Q49

R19

28k

51

R21

NC

R25

NC

D11

R26

12

D10

BAT54

1N4148WS

C38

0.22u/100V

R32

D13

R34

1K

4

D14

1N4148WS

R44

10

Q9

FDMS8025S

R45

G

1

S

2

S

3

S

Q54

FDMC2523P

PA0810NL

BAT54

D16

D15

BAT54

2.2

Q10

FDMS8025S

R36

FDMS8025S

Q11

FDMS8025S

Q12

1

VOUT-

J11

1

GND

1

R20 1k

3 7

5

D

6

D

7

D

8

D

9

D

12345

6

7810

2.2

R37

2.2

R38

2.2

+

C25

330uF / 6.3V

+

C26

330uF / 6.3V

+

C27

330uF / 6.3V

C28 22uF/6.3V

C29 22uF/6.3V

C33 22uF/6.3V

C30 22uF/6.3V

J9

VIN+

1

2.2uF/100V C19

2.2uF/100V C20

2.2uF/100V C21

P8208

T1

8

C37 0.047uF /250V

T2

11

R35

11

7

1

VOUT+

1

Figure 17. Active Clamp Forward DC-DC Block Schematic

J8

VIN+

R48

50K 1%

T2P

U5

HMHA2801

PA0373NL

T3

1

6

D12

BAT54

10u/35V C36

P_BIAS

20k

R47

J10

8. Bill of Materials

# Qty. Reference Part Name Vendor Comment

1 8

2 8

3 1 C10 C2012X7R2A104K TDK

4 1 C11 VJ0805Y563KXBAT Vishay 56 nF 100 V / 2012

5 1 C12 63SXV33M Sanyo 33 µF / 63 V / Alu

6 2 C13,C36 CL32A106KLULNNE SAMSUNG 10µF / 35 V / 3225

7 1 C14 10 nF / 50 V Any 10 nF / 50 V / 1608

8 1 C15 1 µF / 50 V Any 1 µF / 50 V / 1608

9 2 C16,C32 0.1 µF / 50 V Any 0.1 µF / 50 V / 1608

10 3 C19,C20,C21 GRM32ER72A225KA35L MURATA

11 2 C22,C23 GRM32ER61C476ME15L MURATA 47 µF /16V/3225

12 1 C24 330 pF / 50 V Any 330 pF / 50 V / 1608

13 3 C25,C26,C27 T520D337M006ATE010 Kemet

14 4 C28,C29,C30,C33 C3216X5R0J226M TDK 22 µF /6.3V/3216

15 1 C31 100 pF / 50 V Any 100 pF / 50 V / 1608

16 1 C34 82 nF / 50 V Any 82 nF /50 V / 1608

17 2 C35,C38 C0805C224K1RACTU Kemet

18 1 C37 GRM31CR72E473KW03L MURATA 47 nF /250 V / 3210

19 8

20 8

21 1 D9 SMAJ58A Diodes TVS diode

22 4 D10,D12,D15,D16 BAT54 Fairchild Semiconductor BAT54

23 2 D13,D14 1N4148WS Fairchild Semiconductor 1N4148WS

24 1 D17 S310 Fairchild Semiconductor S310

25 1 J1 7499511611A Wurth Electronics

26 9

27 2 Q1,Q2 FDMQ8203 Fairchild Semiconductor

28 4 Q3,Q4,Q5,Q6 BC846BPDW1T1G ON Semiconductor

29 1 Q7 FDMC86102 Fairchild Semiconductor

30 1 Q8 FDMS86200 Fairchild Semiconductor

31 4 Q9,Q10,Q11,Q12 FDMS8025S Fairchild Semiconductor

C1,C2,C3,C4,C5,C6,C

7,C8

C9,D11,C17,C18,

R21,R25,R40,Q50

DZ1,DZ2,DZ3,DZ4,DZ

5,DZ6,DZ7,DZ8

D1,D2,D3,D4,D5,D6,D

7,D8

J2,J3,J4,J5,J6,J7,J8,J

9,J10,J11

1 nF / 1005 Any 1 nF / 50 V / 1005

NC

0.1 µF / 100 V / 2012

2.2 µF / 100 V / 3225

330 µF / 6.3 V /

Tantalum

220 nF /100 V /

2012

MM5Z10V Fairchild Semiconductor 10 V Zener Diode

BAS516 NXP Semiconductors

Test Pin Any 3 mm

SW 75 V 250 mA

HS

RJ45 w/

Transformer

GreenBridge™ Quad MOSFET

80 V Dual

Complementary

100 V 24 m

MOSFET

150 V 18 m

MOSFET

30 V 2.8 m

MOSFET

# Qty. Reference Part Name Vendor Comment

32 1 Q49 MMBT2222A Fairchild Semiconductor NPN Transistor

33 1 Q54 FDMC2523P Fairchild Semiconductor

34 9

35 2 R10,R13 0  / 1608 Any 0  / 1608

36 1 R11 82 k / 1608 Any 82 k / 1608

37 2 R12,R47 20 k / 1608 Any 20 k / 1608

38 1 R14 49.9  / 1608 Any 49.9  / 1608

39 1 R15 120  / 1608 Any 120  / 1608

40 1 R16 8.2  / 1608 Any 8.2  / 1608

41 1 R17 3.3 k / 1608 Any 3.3 k / 1608

42 1 R18 910  / 1608 Any 910  / 1608

43 1 R19 28 k / 1608 Any 28 k / 1608

44 3 R20,R34,R43 1 k / 1608 Any 1 k / 1608

45 1 R22 820  / 1608 Any 820  / 1608

46 2 R23,R39 499  / 1608 Any 499  / 1608

47 1 R24 10 k / 1608 Any 10 k / 1608

48 1 R26 12  / 1608 Any 12  / 1608

49 1 R27 68 k / 1608 Any 68 k / 1608

50 1 R28 12 k / 1608 Any 12 k / 1608

51 1 R29 75 k / 1608 Any 75 k / 1608

52 1 R30 56 k / 1608 Any 56 k / 1608

53 1 R31 8.2 k / 1608 Any 8.2 k / 1608

54 6

55 1 R33 2 k / 1608 Any 2 k / 1608

56 1 R42 27 k / 1608 Any 27 k / 1608

57 1 R44 10  / 1608 Any 10  / 1608

58 1 R45 51  / 1608 Any 51  / 1608

59 1 R46 16 k / 1608 Any 16 k / 1608

60 1 R48 50 k Any 50 k

61 1 T1 P8208NL Pulse

62 1 T2 PA0810NL Pulse Inductor

63 1 T3 PA0373NL Pulse Transformer

64 1 U1 LT4275 Linear

65 1 U2 UCC2891PW Texas Instruments PWM Controller

66 1 U3 TLV431 Texas Instruments Shunt Regulator

67 1 U4 SFH690BT Vishay Semiconductors Phototransistor

68 1 U5 HMHA2801 Fairchild Semiconductor Opto-coupler

69 1 Z1 MMSZ5231B 5.1Vz Fairchild Semiconductor MMSZ5231B 5.1Vz

R1,R2,R3,R4,R5,R6,R

7,R8,R9

R32,R35,R36,R37,R38

,R41

20 k / 1005 Any 20 k / 1005

2.2  / 1608 Any 2.2  / 1608

(-)150 V 1.5 

MOSFET

CURRENT SENSE

2000 µH

PoE++ PD

Controller

9. Revision History

Rev. Date Description

1.0.0 September 2013 Initial Release

1.0.1 November 2013 Fixed typo table 4 VOUT to VIN

WARNING AND DISCLAIMER

Replace components on the Evaluation Board only with those parts shown on the parts list (or Bill of Materials) in the Users’ Guide. Contact an authorized Fairchild representative with any questions.

This board is intended to be used by certified professionals, in a lab environment, following proper safety procedures. Use at your own risk. The Evaluation board (or kit) is for demonstration purposes only and neither the Board nor this User’s Guide constitute a sales contract or create any kind of warranty, whether express or implied, as to the applications or products involved. Fairchild warrantees that its products meet Fairchild’s published specifications, but does not guarantee that its products work in any specific application. Fairchild reserves the right to make changes without notice to any products described herein to improve reliability, function, or design. Either the applicable sales contract signed by Fairchild and Buyer or, if no contract exists, Fairchild’s standard Terms and Conditions on the back of Fairchild invoices, govern the terms of sale of the products described herein.

DISCLAIMER

FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION, OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.

LIFE SUPPORT POLICY

FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION.

As used herein:

1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user.

ANTI-COUNTERFEITING POLICY

Fairchild Semiconductor Corporation's Anti-Counterfeiting Policy. Fairchild's Anti-Counterfeiting Policy is also stated on our external website, www.fairchildsemi.com, under Sales Support.

Counterfeiting of semiconductor parts is a growing problem in the industry. All manufacturers of semiconductor products are experiencing counterfeiting of their parts. Customers who inadvertently purchase counterfeit parts experience many problems such as loss of brand reputation, substandard performance, failed applications, and increased cost of production and manufacturing delays. Fairchild is taking strong measures to protect ourselves and our customers from the proliferation of counterfeit parts. Fairchild strongly encourages customers to purchase Fairchild parts either directly from Fairchild or from Authorized Fairchild Distributors who are listed by country on our web page cited above. Products customers buy either from Fairchild directly or from Authorized Fairchild Distributors are genuine parts, have full traceability, meet Fairchild's quality standards for handling and storage and provide access to Fairchild's full range of up-to-date technical and product information. Fairchild and our Authorized Distributors will stand behind all warranties and will appropriately address any warranty issues that may arise. Fairchild will not provide any warranty coverage or other assistance for parts bought from Unauthorized Sources. Fairchild is committed to combat this global problem and encourage our customers to do their part in stopping this practice by buying direct or from authorized distributors.

EXPORT COMPLIANCE STATEMENT

These commodities, technology, or software were exported from the United States in accordance with the Export Administration Regulations for the ultimate destination listed on the commercial invoice. Diversion contrary to U.S. law is prohibited.

U.S. origin products and products made with U.S. origin technology are subject to U.S Re-export laws. In the event of re-export, the user will be responsible to ensure the appropriate U.S. export regulations are followed.

2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.

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