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dc1755af

DEMO MANUAL DC1755A

PARTS LIST

ITEM

QTY

REFERENCE

PART DESCRIPTION

MANUFACTURER/PART NUMBER

Required Circuit Components

1

1

CIN1

CAP, 180μF 20% 16V OSCON

SANYO 16SVP180MX

2

4

CIN3, CIN5, CIN7, CIN9

CAP, 1210 22μF 20% 16V X5R

TDK C3225X5R1C226M

3

12

COUT1 to COUT3, COUT4 to COUT6, 
COUT11 to COUT13, COUT14 to COUT16

CAP, 7343 330μF 20% 2.5V POSCAP

SANYO 2R5TPE330M9L

4

8

COUT7 to COUT10, COUT17 to COUT20

CAP, 1206 100μF 20% 6.3V X5R

MURATA GRM31CR60J107ME39L

5

2

C1 to A, C1 to B

CAP, 0603 470pF 10% 25V NPO

AVX 06033A471KAT2A

6

8

C1, C8, C9, C10, C13, C20, C21, C22

CAP, 0603 0.22μF 10% 25V X7R

TDK C1608X7R1E224K

7

8

C2, C11, C14, C23, C31, C32, C33, C34

CAP, 0603 2.2μF 10% 16V X7R

MURATA GRM188R61C225KE15

8

2

C4, C16

CAP, 0603 100pF 5% 25V NPO

AVX 06033A101JAT2A

9

2

C2 to A, C2 to B

CAP, 0603 68pF 5% 25V NPO

AVX 06033A680JAT2A

10

2

C3 to A, C3 to B

CAP, 0603 2200pF 25V X7R

MURATA GRM188R71E222MA01

11

3

C7, C19, C28

CAP, 0603 1μF 20% 25V X5R

AVX 06033D105MAT2A

12

4

L1, L2, L3, L4

IND, 0.47μH 20%

WÜRTH 744355147

13

1

RB to A

RES, 0603 13.3k 1% 1/10W

VISHAY CRCW060313K3FKEA

14

1

RB to B

RES, 0603 20k 1% 1/10W

NIC NRC06F2002TRF

15

19

R1, R11, R12, R16, R20, R25, R36, R45, R46, 
R50, R54, R55, R59, R62, R69, R112, R113, 
R116, R118

RES, 0603 0Ω JUMPER

VISHAY CRCW06030000Z0EA

16

2

R1 to A, R1 to B

RES, 0603 20k 1% 1/10W

NIC NRC06F2002TRF

17

6

R2, R17, R37, R51, R57, R107

RES, 0603 1Ω 5% 1/10W

VISHAY CRCW06031R00JNEA

18

2

R2 to A, R2 to B

RES, 0603 6.8k 1% 1/10W

VISHAY CRCW06036K80FKEA

19

2

R3 to A, R3 to B

RES, 0603 523Ω 1% 1/10W

VISHAY CRCW0603523RFKEA

20

9

R3, R4, R24, R26, R31, R38, R39, R61, R63

RES, 0603 10k 1% 1/10W

VISHAY CRCW060310K0FKEA

21

2

R8, R43

RES, 0603 100k 5% 1/10W

YAGEO RC0603JR-07100KL

22

4

R15, R33, R49, R70

RES, 0603 2.87k 1% 1/10W

VISHAY CRCW06032K87FKEA

23

2

R18, R52

RES, 0603 59.0k 1% 1/10W

VISHAY CRCW060359K0FKEA

24

4

R19, R21, R53, R56

RES, 0603 10Ω 1% 1/10W

NIC NRC06F10R0TRF

25

2

R30, R67

RES, 0603 40.2k 1% 1/10W

VISHAY CRCW060340K2FKEA

26

2

U1, U2

IC, DUAL OUTPUT BUCK CONVERTER

LINEAR TECHNOLOGY LTC3860EUH

27

4

U3, U4, U5, U6

INTEGRATED MOSFET, DC/DC CONVERTER 

FAIRCHILD FDMF6707B

Bias Supply and UVLO Circuit

1

1

C29

CAP, 0603 2.2μF 10% 16V X7R

MURATA GRM188R61C225KE15

2

1

C25

CAP, 0603 1μF 20% 25V X5R

AVX 06033D105MAT2A

3

1

C26

CAP, 0805 10μF 10% 25V NPO

AVX 08053D106MAT2A  

4

1

C27

CAP, 0603 0.1μF 10% 16V X7R

AVX 0603YC104KAT2A

5

1

C30

CAP, 0603 10pF 5% 50V NPO

MURATA GQM1885C1H100JB01

6

1

D1

DIODE, BAV170 SOT23

DIODES INC., BAV170

7

1

D2

DIODE SHOTTKY SOD326

NXP PMEG2005AEA

8

1

L5

INDUCTOR 27μH 20%

WÜRTH 7447789127

9

1

R105

RES, 0603 20k 1% 1/10W

NIC NRC06F2002TRF

10

1

R106

RES, 0603 10k 1% 1/10W

VISHAY CRCW060310K0FKEA

Summary of Contents for DC1755A

Page 1: ...logy Corporation All other trademarks are the property of their respective owners PERFORMANCE SUMMARY The main features of the board are listed below High efficiency and high current density Remote sensing for each output Optional resistors to tie the two outputs together Connectorandheadertotietwoormoreboardstogether for up to 12 phase operation RUN PGOOD and TRACK SS pins for each output CLKIN a...

Page 2: ...TA or VOUTB to measure the output voltage ripple Note 3 Do not apply the load from the VOSA turret to the VOSA turret or from the VOSB turret to the VOSB turret These turrets are only intended to monitor the voltage across COUT3 and COUT13 respectively Heavy load currents applied across these turrets may damage the converter DYNAMIC LOAD CIRCUIT OPTIONAL Demonstration circuit 1755A provides a simp...

Page 3: ... Figure 1 Proper Measurement Equipment Setup IOUTA A A IIN VIN supply V VOUTA V VOUTA load VOUTB load A IOUTB V VOUTB VIN Monitor voltage across COUT7 and COUT19 for accurate efficiency measurements DC1755a F01 QUICK START PROCEDURE ...

Page 4: ...errighthandcorner Totie thetwooutputstogether makethefollowingmodifications 1 Select one rail to be the master a If VOUTA is the master then stuff 0Ω at R103 to disable the error amplifier for VOUTB b If VOUTB is the master then stuff 0Ω at R104 to disable the error amplifier for VOUTA 2 Stuff 0Ω at R87 R88 R89 and R91 to tie the IAVG COMP TRACK SS and RUN signals together 3 Remove the redundant c...

Page 5: ...the slave Figure 6 shows the typical setup for a 6 phase 2 phase converter Figure 7 shows the typical setup for a 12 phase converter For additional help and support contact your local LTC sales office BOARD 2 SIDE A SLAVE SIDE B INDEPENDENT DUAL PHASE RAIL R87 R88 R89 R91 NOT STUFFED R101 R102 NOT STUFFED R103 NOT STUFFED R104 0 Cu GND GND TOP BOTTOM BOARD 1 BOARD 2 BOARD 2 BOARD 1 BOARD 1 MASTER ...

Page 6: ...BOTTOM BOARD 1 BOARD 2 BOARD 3 BOARD 3 BOARD 2 BOARD 1 BOARD 1 MASTER R87 R88 R89 R91 0 R101 R102 0 0m R103 0 R104 NOT STUFFED BOARD 2 SLAVE R87 R88 R89 R91 0 R101 R102 0 0m R103 R104 0 BOARD 3 SLAVE R87 R88 R89 R91 0 R101 R102 0 0m R103 R104 0 Cu Cu Cu Cu Cu Cu Cu DC1755a F07 QUICK START PROCEDURE ...

Page 7: ...18 RES 0603 0Ω JUMPER VISHAY CRCW06030000Z0EA 16 2 R1 to A R1 to B RES 0603 20k 1 1 10W NIC NRC06F2002TRF 17 6 R2 R17 R37 R51 R57 R107 RES 0603 1Ω 5 1 10W VISHAY CRCW06031R00JNEA 18 2 R2 to A R2 to B RES 0603 6 8k 1 1 10W VISHAY CRCW06036K80FKEA 19 2 R3 to A R3 to B RES 0603 523Ω 1 1 10W VISHAY CRCW0603523RFKEA 20 9 R3 R4 R24 R26 R31 R38 R39 R61 R63 RES 0603 10k 1 1 10W VISHAY CRCW060310K0FKEA 21 ...

Page 8: ...2 R87 R88 R89 R91 R92 R94 R95 R96 R103 R104 R108 R110 R111 R114 R115 R117 R119 RES 0603 OPTIONAL 6 0 C3 C5 C6 C12 C15 C17 C18 C24 CAP 0603 OPTIONAL 7 0 Q2 Q3 MOSFET TO 252 OPTIONAL 8 0 R73 R74 R77 R78 R83 R84 R85 R86 RES 0603 OPTIONAL 9 0 R80 R82 R101 R102 RES 2010 OPTIONAL 10 2 Q1 Q4 MOSFET TO 252 VISHAY SUD50N03 09P 11 2 R75 R76 RES 0603 10k 1 1 10W VISHAY CRCW060310K0FKEA 12 2 R79 R81 RES 2010 ...

Page 9: ...E WITH LINEAR TECHNOLOGY PARTS SCALE NONE www linear com 2 Monday January 16 2012 1 3 DUAL OUTPUT 4 PHASE STEP DOWN CONVERTER AK MIKE S N A LTC3860EUH DEMO CIRCUIT 1755A R6 OPT R6 OPT U1 LTC3860EUH U1 LTC3860EUH VCC 1 FB1 2 COMP1 3 VSNSOUT 4 VSNSN 5 VSNSP 6 COMP2 7 FB2 8 TRK SS2 9 RUN2 17 ILIM2 18 PWM2 16 ISNS1N 21 ISNS2N 20 ISNS1P 22 ILIM1 23 RUN1 24 PWM1 25 IAVG 28 ISNS2P 19 FREQ 10 CLKIN 11 CLK...

Page 10: ... DOWN CONVERTER AK MIKE S N A LTC3860EUH DEMO CIRCUIT 1755A C13 0 22uF C13 0 22uF C17 OPT C17 OPT R36 0 R36 0 E27 VOSB E27 VOSB R113 0 R113 0 R54 0 R54 0 R61 10K R61 10K E10 PGOODB E10 PGOODB COUT13 330uF 2 5V COUT13 330uF 2 5V COUT18 100uF 6 3V 1206 COUT18 100uF 6 3V 1206 U2 LTC3860EUH U2 LTC3860EUH VCC 1 FB1 2 COMP1 3 VSNSOUT 4 VSNSN 5 VSNSP 6 COMP2 7 FB2 8 TRK SS2 9 RUN2 17 ILIM2 18 PWM2 16 ISN...

Page 11: ...RCUIT THAT MEETS CUSTOMER SUPPLIED SPECIFICATIONS HOWEVER IT REMAINS THE CUSTOMER S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND ...

Page 12: ...LUDING 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 CONSEQUENTIAL DAMAGES The user assumes all responsibility and liability for proper and safe handling of the goods Further the user releases LTC from all claims arising from the handling or use of the go...

Page 13: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Analog Devices Inc DC1755A ...

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