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dc1781af

DEMO MANUAL DC1781A

PARTS LIST

ITEM

QTY

REFERENCE

PART DESCRIPTION

MANUFACTURER/PART NUMBER

Required Circuit Components

1

3

CIN1, CIN2, CIN3

CAP., X7R, 2.2μF, 50V, 10%, 1210

TDK, C3225X7R1H225K

2

1

C1

CAP., X7R, 0.47μF, 25V, 10%, 0603

MURATA, GRM188R71E474KA12D

3

2

C2, C9

CAP., X7R, 0.22μF, 25V, 10%, 0603

TDK, C1608X7R1E224K

4

2

C3, C10

CAP., X5R, 47μF, 10V, 20%, 1206

TAIYO YUDEN, LMK316BJ476ML-T

5

1

C4

CAP., X5R, 22μF, 6.3V, 20%, 1206

TAIYO YUDEN, JMK316BJ226ML

6

3

C5, C6, C11

CAP., X7R, 680pF, 50V, 10%, 0402

AVX, 04025C681KAT

7

4

C7, C8, C13, C20

CAP., X5R, 0.1μF, 10V, 10%, 0402

AVX, 0402ZD104KAT

8

1

C12

CAP., X5R, 2.2μF, 6.3V, 20%, 0603

TAIYO YUDEN, JMK107BJ225MA

9

3

C15, C17, C19

CAP., NPO, 47pF, 50V, 5%, 0402

AVX, 04025A470JAT

10

1

D4

DIODE, SCHOTTKY, B340A, SMA-DIODE

DIODES INC., B340A

11

2

D5, D6

DIODE, SCHOTTKY, B240A, SMA-DIODE

DIODES INC., B240A

12

3

D7, D8, D9

DIODE, SCHOTTKY, CMDSH-4E, SOD323

CENTRAL SEMI., CMDSH-4E

13

1

L1

IND., 4.7μH

NIC, NPIM74C4R7MTRF

14

1

L2

IND., 8.2μH

NIC, NPIM74C8R2MTRF

15

1

L3

IND., 10μH

NIC, NPIM74C100MTRF

16

1

Q1

XTOR, NPN, 50V LOW SATURATION, MLP322

ZETEX, ZXTCM322TA

17

5

R1, R2, R3, R15, R22

RES., CHIP, 100k, 1/16W, 1%, 0402

YAGEO, RC0402FR-07100KL

18

1

R4

RES., CHIP, 12.4k, 1/16W, 1%, 0402

VISHAY, CRCW040212K4FKEA

19

1

R5

RES., CHIP, 31.6k, 1/16W, 1% 0402

VISHAY, CRCW040231K6FKEA

20

3

R6, R7, R11

RES., CHIP, 20k, 1/16W, 1% 0402

VISHAY, CRCW040220K0FKEA

21

3

R8, R9, R23

RES., CHIP, 10k, 1/16W, 1% 0402

YAGEO, RC0402FR-0710KL 

22

1

R10

RES., CHIP, 53.6k, 1/16W, 1% 0402

VISHAY, CRCW040253K6FKEA

23

1

R12

RES., CHIP, 10.2k, 1/16W, 1% 0402

NIC, NRC04F1022TRF

24

1

R13

RES., CHIP, 1.07k, 1/16W, 1% 0402

YAGEO, RC0402FR-071K07L 

25

1

R14

RES., CHIP, 49.9k, 1/16W, 1% 0402

VISHAY, CRCW040249K9FKEA

26

1

R16

RES., CHIP, 499, 1/16W, 1% 0402

AAC, CR05-4990FM

27

1

R17

RES., CHIP, 18.2k, 1/16W, 1% 0402

VISHAY, CRCW040218K2FKEA

28

1

R18

RES., CHIP, 3.32k, 1/16W, 1% 0402

VISHAY, CRCW04023K32FKEA

29

1

R19

RES., CHIP, 107k, 1/16W, 1% 0402

AAC, CR05-1073FM

30

1

U1

I.C., LT3507EUHF, QFN38UHF

LINEAR TECH., LT3507EUHF

Summary of Contents for LT3507A

Page 1: ...ponentsize Programmablefrequencyallowsforopti mization between efficiency and external component size Each output can be independently disabled using its own soft start pin or by using the SD terminal...

Page 2: ...pe probe technique 1 With power off connect the input power supply to VIN and GND 2 Turn on the power at the input NOTE Make sure that the input voltage does not ex ceed 36V 3 Check for the proper out...

Page 3: ...3 dc1781af DEMO MANUAL DC1781A QUICK START PROCEDURE Figure 2 DC1781A Proper Equipment Setup Figure 3 Measuring Input or Output Ripple V IN GND...

Page 4: ...resistoriftheboardissynchronizedfrom an external signal generator Figure 4 Cut Line for the EMI Filter Installation EMI FILTER Install EMI filters on the backside of the DC1781A how ever a trace cut i...

Page 5: ...CENTRAL SEMI CMDSH 4E 13 1 L1 IND 4 7 H NIC NPIM74C4R7MTRF 14 1 L2 IND 8 2 H NIC NPIM74C8R2MTRF 15 1 L3 IND 10 H NIC NPIM74C100MTRF 16 1 Q1 XTOR NPN 50V LOW SATURATION MLP322 ZETEX ZXTCM322TA 17 5 R1...

Page 6: ...0 C23 CAP ELECTROLYTIC 22 F 50V OPT 6 4 C24 C27 CAP X5R 1 F 10V 10 0603 MURATA GRM188R61A105K 7 0 C29 CAP 1206 OPT 8 0 D1 D2 D3 DIODE SCHOTTKY CMDSH 4E SOD323 OPT 9 0 FB1 BEAD 1206 OPT TAIYO YUDEN FB...

Page 7: ...rporation is believed to be accurate and reliable However no responsibility is assumed for its use Linear Technology Corporation makes no representa tion that the interconnection of its circuits as de...

Page 8: ...ING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE EXCEPT TO THE EXTENT OF THIS INDEMNITY NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSE...

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