Texas Instruments AN-1574 LM5073 Скачать руководство пользователя страница 17

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Bill of Materials

Table 6. Bill of Materials (continued)

ITEM

PART NUMBER

DESCRIPTION

VALUE

P9

3104-2-00-01-00-00-080

POST, MILL MAX

P10

3104-2-00-01-00-00-080

POST, MILL MAX

P11

3104-2-00-01-00-00-080

POST, MILL MAX

P12

3104-2-00-01-00-00-080

POST, MILL MAX

P13

3104-2-00-01-00-00-080

POST, MILL MAX

P14

3104-2-00-01-00-00-080

POST, MILL MAX

P15

3104-2-00-01-00-00-080

POST, MILL MAX

Q1

NU

NOT POPULATED

Q2

NU

NOT POPULATED

R1

CRCW08050R0J

RESISTOR

0 Ohm

R2

NU

NOT POPULATED

R3

CRCW08050R0J

RESISTOR

0 Ohm

R4

CRCW08051002F

RESISTOR

10K

R5

NU

NOT POPULATED

R6

NU

NOT POPULATED

R7

CRCW08051582F

RESISTOR

15.8K

R8

CRCW08053013F

RESISTOR

301K

R9

CRCW08054991F

RESISTOR

4.99K

R10

CRCW08053321F

RESISTOR

3.32K

R11

CRCW12062492F

RESISTOR

24.9K

R12

CRCW12062492F

RESISTOR

24.9K

R13

NU

NOT POPULATED

R14

NU

NOT POPULATED

R15

NU

NOT POPULATED

R16

NU

NOT POPULATED

R17

CRCW2512100J

RESISTOR

1 Ohm, 1W

R18

CRCW2512100J

RESISTOR

1 Ohm, 1W

R25

NU

NOT POPULATED

R26

CRCW08051002F

RESISTOR

10K

R27

CRCW08051002F

RESISTOR

10K

R28

NU

NOT POPULATED

R29

NU

NOT POPULATED

R32

CRCW08054532F

RESISTOR

45.3K

R33

CRCW08054992F

RESISTOR

49.9K

R34

CRCW08055111F

RESISTOR

5.11K

R35

CRCW08053011F

RESISTOR

3.01K

R36

NU

NOT POPULATED

T1

SHORT LEADS

SHORT LEADS ON EACH SIDE (1-2, 3-4)

AWG18 BUS WIRE

T4

ETH1-230LD

XFMR, POE+ETHERNET, COILCRAFT

U1

LM5073

PD INTERFACE, NSC

U2

LM5576

REGULATOR, NSC

Z1

SMAJ58A

TVS, 58V, SMA, DIODE INC

Z2

NU

NOT POPULATED

Z3

NU

NOT POPULATED

17

SNVA214A – April 2007 – Revised April 2013

AN-1574 LM5073 Evaluation Board

Submit Documentation Feedback

Copyright © 2007–2013, Texas Instruments Incorporated

Содержание AN-1574 LM5073

Страница 1: ...r optimal solution On board DC DC converter Output voltage 3 3V Maximum output current 3 0A Switching frequency 150kHz Easily reconfigurable for different applications Complete PD interface including...

Страница 2: ...it J5 and J6 3 3V output port of the onboard buck regulator J5 is the high potential pin P1 and P2 a pair of pins for quick PoE input connection from a bench power supply to the center taps of the Eth...

Страница 3: ...rt pins 2 and 3 to bypass common mode input filter Either of the two settings must be selected Short pins 1 and 2 to use the differential input filter JMP6 Short pins 2 and 3 to bypass the differentia...

Страница 4: ...rnal DC DC converter s input capacitance is not enough C8 of the evaluation board can be used Using C8 but excluding L1 JMP6 s three pins should be all shorted together 8 A Note About the Onboard Buck...

Страница 5: ...n order to obtain IEEE 802 3af specified maximum power the Aux source voltage should be greater than 20V Otherwise the obtainable power from the Aux source will be limited by the LM5073 s maximum curr...

Страница 6: ...d configuration for an IEEE 802 3af fully compliant PD interface with rear Aux power support This configuration is recommended for low voltage Aux power sources such as 12V or 24 ac adapters The minim...

Страница 7: ...s R7 may need to be removed or replaced in order to limit the dc current per IEEE 802 3af Refer to LM5073 datasheet for R7 selection Figure 4 IEEE 802 3af Fully Compliant PD Interface with Front Aux P...

Страница 8: ...AUX input voltage is not adequate for the controller to start To select this feature install D3 and R25 according to Table 7 and have JMP2 s pins 2 and 3 shorted but pin 1 open A linear regulator to p...

Страница 9: ...the bench supply s voltmeter or ammeter if accurate efficiency measurements are desired 14 2 Source Power To fully test the evaluation board for high power PD applications either a high power PSE able...

Страница 10: ...mined by R6 of 31 6 This sets the evaluation board to Class 4 which is reserved for future use per IEEE 802 3af namely the high power application If the proper response is not observed during both det...

Страница 11: ...s complete the DC DC converter enters steady state operation and output regulation will be achieved 16 Aux Power Up Sequence The FAUX input power up sequence is similar to that of the PoE input with t...

Страница 12: ...The input current 1A div Figure 8 RAUX Power Up Sequence 18 Ripple Voltage and Current Figure 9 shows the output ripple voltage and input ripple current when the evaluation board is configured to use...

Страница 13: ...ete Evaluation Board Schematic Figure 10 The Complete Schematic of the Evaluation Board Figure 11 Silkscreen 13 SNVA214A April 2007 Revised April 2013 AN 1574 LM5073 Evaluation Board Submit Documentat...

Страница 14: ...Evaluation Board Schematic www ti com Figure 12 Top Layer 14 AN 1574 LM5073 Evaluation Board SNVA214A April 2007 Revised April 2013 Submit Documentation Feedback Copyright 2007 2013 Texas Instruments...

Страница 15: ...0805 KEMET 0 047 F 50V C5 NU NOT POPULATED C6 NU NOT POPULATED C7 NU NOT POPULATED C8 EEV HA2A220P CAPACITOR AL ELEC PANASONIC 22 F 100V C9 NU NOT POPULATED C10 NU NOT POPULATED C11 C2012X5R1C102K CAP...

Страница 16: ...4 2 00 01 00 00 080 POST MILL MAX JMP1 A26542 ND CONN HEADER VERT 2POS DIGI KEY 2 PIN HEADER JMP2 A26544 ND CONN HEADER VERT 3POS DIGI KEY 3 PIN HEADER JMP3 A26544 ND CONN HEADER VERT 3POS DIGI KEY 3...

Страница 17: ...ISTOR 3 32K R11 CRCW12062492F RESISTOR 24 9K R12 CRCW12062492F RESISTOR 24 9K R13 NU NOT POPULATED R14 NU NOT POPULATED R15 NU NOT POPULATED R16 NU NOT POPULATED R17 CRCW2512100J RESISTOR 1 Ohm 1W R18...

Страница 18: ...5mA 75V D6 CMHD4448 DIODE SOD123 CENTRAL 125mA 75V Q1 CMPT2222A BIPOLAR NPN SOT 23 CENTRAL 0 6A 60V Q2 SI4470EY MOSFET N CH SO 8 VISHAY 12A 60V R13 CRCW1206100RJ RESISTOR 100 R14 CRCW12062001F RESISTO...

Страница 19: ...sponsible for compliance with all legal regulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related inf...

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