background image

4

dc1900af

DEMO MANUAL DC1900A

parts List

ITEM

QTY

REFERENCE

PART DESCRIPTION

MANUFACTURER/PART NUMBER

Required Circuit Components

1

2

C1, C3

CAP, 1206, CER. 22µF 25V X5R 20%

MURATA, GRM31CR61E226KE15L 

2

1

C6

CAP, 0603, X5R, 1uF, 16V 10% 

AVX,  0603YD105KAT2A

3

4

C9, C17, C28, C36

CAP, 1210 CER. 47µF 6.3V 

AVX, 12106D476MAT2A

4

4

C10, C16, C29, C35

CAP, 1206, X5R, 47uF, 6.3V, 20%

TAIYO YUDEN, JMK316BJ476ML

5

1

R3

RES, 0603, 13.3kΩ 1% 1/10W

VISHAY CRCW060313K3FKEA

6

1

R4

RES, 0603, 40.2kΩ 1% 1/10W

VISHAY CRCW060340K2FKEA

7

2

R11

RES, 0603, 19.1kΩ 1% 1/10W

VISHAY CRCW060319K1FKEA

8

1

R12

RES, 0603, 60.4kΩ 1% 1/10W

VISHAY CRCW060360K4FKEA

9

1

U1

LTM4644EY, BGA-15X9-5.01

LINEAR TECH.CORP. LTM4644EY

Additional Demo Board Circuit Components

1

2

C4, C5

CAP, 1206, CER. 22µF 25V X5R 20%

MURATA, GRM31CR61E226KE15L 

2

1

C2

CAP, 7343, POSCAP 68µF 16V

SANYO, 16TQC68MYF

3

6

C7, C21, C22, C31, C41, C42

CAP, 0603, OPTION 

OPTION

4

4

C8, C18, C27, C37

CAP, 7343, POSCAP, OPTION

OPTION

5

8

C11, C12, C14, C15, C30, C38, C33, C34

CAP, 1206, CER., OPTION

OPTION

6

2

C13, C32

CAP, 0603, CER., 100PF

AVX 06033C101KAT2A 

7

4

R7, R8, R15, R16

RES, 0603, 0Ω 1% 1/10W

VISHAY, CRCW06030000Z0ED

8

1

R28

RES, 0805, 0Ω 5% 1/16W

VISHAY, CRCW08050000Z0EA

9

4

R19, R20, R21, R22

RES, 0603, 150kΩ 5% 1/10W

VISHAY CRCW0603150KJNEA

10

4

R23, R24, R25, R26

RES, 0603, 100kΩ 5% 1/10W

VISHAY CRCW0603100KJNEA

11

4

R9, R10, R17, R18

RES, 0603, OPTION

OPTION

12

12

R32-R35, R37-R40, R42-R45 (OPT)

RES, 0603, OPTION

OPTION

13

3

R36, R41, R46 (OPT)

RES, 2512, 0Ω, OPTION

OPTION

14

4

C25, C26, C45, C46

CAP, 0603, CER. 10µF 50V X7R 

TDK, C1608X7R1H104M

15

1

R1

RES., 0603, CHIP, 10k, 1%

VISHAY, CRCW060310K0FKED

16

1

R2

RES, 0603, 1Ω 5% 1/10W

VISHAY,CRCW06031R00JNEA

17

4

R27, R29, R30, R31

RES, 0603, 100kΩ 5% 1/10W

VISHAY CRCW0603100KJNEA

Hardware

1

16

E1, E3-E17

TESTPOINT, TURRET 0.094"

MILLMAX 2501-2-00-80-00-00-07-0

2

2

J1, J2

JACK, BANANA

KEYSTONE 575-4

3

8

JP1-JP8

JMP, 0.079 SINGLE ROW HEADER, 3 PIN

SULLINS, NRPN031PAEN-RC

4

8

XJP1-XJP8

SHUNT, .079" CENTER

SAMTEC, 2SN-BK-G

5

4

STAND-OFFS

STAND-OFF, SNAP ON, NYLON  0.375" TALL

KEYSTONE, 8832(SNAP ON)

Downloaded from

Arrow.com.

Downloaded from

Arrow.com.

Downloaded from

Arrow.com.

Downloaded from

Arrow.com.

Summary of Contents for DC1900A

Page 1: ... respective owners Performance Summary Board Photo few input and output capacitors Output voltage tracking is available through the TRACK SS pin for supply rail se quencing External clock synchronization is also available through the CLKIN pin The LTM4644 data sheet must be readinconjunctionwiththisdemomanualpriortoworking on or modifying demo circuit 1900A Design files for this circuit board are ...

Page 2: ... voltage supply and meters as shown in Figure 1 4 Turn on input power supply The output voltage meters for each phase should display the programmed output voltage within 2 5 Once the proper output voltage is established adjust the load currents for each phase within the 0A to 4A range and observe the load regulation efficiency and other parameters 6 To observe increased light load efficiency place...

Page 3: ... Measured VOUT1 3 3V and VOUT4 1 2V Load Transient Responses 2A to 4A Load Step Figure 4 Measured Thermal Capture with All Phases at Full Load 4A 20µs DIV DC1900A F03a VOUT1 200mV DIV VIN 12V VOUT 3 3V 2 47µF 6 3V CERAMIC LOAD STEP SLEW RATE 1A µs IOUT1 2A DIV 20µs DIV DC1900A F03b VOUT4 200mV DIV IOUT4 2A DIV VIN 12V VOUT 1 2V 2 47µF 6 3V CERAMIC LOAD STEP SLEW RATE 1A µs DC1900A F04 VIN 12V VOUT...

Page 4: ...C30 C38 C33 C34 CAP 1206 CER OPTION OPTION 6 2 C13 C32 CAP 0603 CER 100PF AVX 06033C101KAT2A 7 4 R7 R8 R15 R16 RES 0603 0Ω 1 1 10W VISHAY CRCW06030000Z0ED 8 1 R28 RES 0805 0Ω 5 1 16W VISHAY CRCW08050000Z0EA 9 4 R19 R20 R21 R22 RES 0603 150kΩ 5 1 10W VISHAY CRCW0603150KJNEA 10 4 R23 R24 R25 R26 RES 0603 100kΩ 5 1 10W VISHAY CRCW0603100KJNEA 11 4 R9 R10 R17 R18 RES 0603 OPTION OPTION 12 12 R32 R35 R...

Page 5: ...ATION 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 SCHEMATIC SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS SCALE NONE www linear com 3 LTM4644EY Tuesday April 23 2013 1 1 QUAD 4A STEP DOWN MODULE REGULATOR LT S...

Page 6: ...CEPT 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 goods Due to the open construction of the product it is the user s responsibility...

Reviews: