Linear Analog Devices DC2605A Guide de configuration rapide

dc2605af

DEMO MANUAL DC2605A

DESCRIPTION

LTC3884ERHE-1, LTC3874EUF-1

Polyphase Single 120A Output Synchronous Buck

Converter with Power System Management

Demonstration circuit 2605A is a high efficiency, high

density, single-output buck converter with 7V to 14V input

range. The output voltage is adjustable from 0.5V to 1.5V,

and can supply up to 120A of load current with a 1V out-

put. The demo board features the LTC

3884-1paired with

a slave controller LTC3874-1 to provide a 4-phase buck

converter solution. The LTC3884-1 is a dual output poly

phase step-down controller for ultra-low DCR sensing

with digital power system management. The LTC

3874-1

is a dual PolyPhase

current mode synchronous step-

down slave controller. Please see LTC3884-1 data sheet

for more detailed information.

DC2605A powers up to default settings and produces

power based on configuration resistors or with its

non-volatile memory without the need for any serial

bus communication. This allows easy evaluation of the

DC/DC converter. To fully explore the extensive power

All registered trademarks and trademarks are the property of their respective owners.

PERFORMANCE SUMMARY

system management features of the part, download the

GUI software LTpowerPlay

onto your PC and use LTC’s

I2C/SMBus/PMBus dongle DC1613A to connect to the

board. LTpowerPlay allows the user to reconfigure the part

on the fly and store the configuration in EEPROM, view

telemetry of voltage, current, temperature and fault status.

GUI Download

The software can be downloaded from:

http://www.linear.com/ltpowerplay

For more details and instructions of LTpowerPlay, please

refer to LTpowerPlay GUI for LTC3884-1 demo manual.

Design files for this circuit board are available at

http://www.linear.com/demo/DC2605A

Specifications are at TA= 25°C

PARAMETER CONDITIONS VALUE

Input Voltage Range 7V to 14V

Output Voltage, VOUT VIN = 7-14V, Single Output, IOUT = 0A to 120A Default: 1V

Maximum Output Current, IOUT VIN = 7-14V, Single Output, VOUT = 0.5V to 1.5V 120A

Typical Efficiency VIN = 12V, Single Output, VOUT = 1.0V, 120A Load 90.2%

Peak Efficiency VIN = 12V, Single Output, VOUT = 1.0V, 70A Load 92.2%

Default Switching Frequency 425kHz

dc2605af

DEMO MANUAL DC2605A

QUICK START PROCEDURE

Demonstration circuit 2605A is easy to set up to evaluate

the performance of the LTC3884-1. Refer to Figure 1 for

the proper measurement equipment setup and follow the

procedure below.

1. With power off, connect the input power supply to VIN

(7V-14V) and GND (input return).

2. Connect the output loads between VOUT and GND (Ini-

tial load: no load). Refer to Figure 1.

3. Connect the DVMs to the input and output.

4. Check the default jumper/switch position: JP1:OFF;

JP2:LOWDCR; JP3: RANGE_LOW; JP4:ON; JP5:EXT;

SW2: OFF.

5. Turn on the input power supply and adjust voltage to

12V.

NOTE:Make sure that the input voltage does not

exceed 14V.

6. Turn on the switch: SW2: ON.

7. Check for the proper output voltages from V

OUT+

VOUT–.

8. Once the proper output voltage is established, adjust

the loads within the operating range and observe the

output voltage regulation, ripple voltage and other

parameters.

9. Connect the dongle and control the output voltage from

the GUI. See “LTpowerPlay Quick Start Guide”session

for details.

Note:When measuring the output or input voltage rip-

ple, do not use the long ground lead on the oscilloscope

probe. See Figure 2 for the proper scope probe technique.

Short, stiff leads need to be soldered to the (+) and (–)

terminals of an output capacitor. The probe’s ground ring

needs to touch the (–) lead and the probe tip needs to

touch the (+) lead.

Connecting a PC to DC2605A

You can use a PC to reconfigure the power management

features of the LTC3884-1 such as:nominal VOUT, mar-

gin set points, OV/UV limits, temperature fault limits,

sequencing parameters, the fault log, fault responses and

other functionality. The DC1613A dongle may be plugged

when VIN is present.

dc2605af

DEMO MANUAL DC2605A

QUICK START PROCEDURE

+–

1mΩ

VOUT

VIN

7V TO 14V

LOAD

(120A)

+–

1mΩ

–

DC2605A F01

Figure 1. Proper Measurement Equipment Setup

Figure 2. Measuring Output Voltage Ripple

+ –

VOUT GND

COUT

dc2605af

DEMO MANUAL DC2605A

INPUT POWER SUPPLY

LOAD (UP TO 120A)

LTC3884-1 DEMO BOARD

DC2605A

USB TO I2C/PMBus DONGLE

DC1613A

USB CABLE VIN

VOUT

CONNECTOR

12-PIN

(J14)

DC2605A F03

QUICK START PROCEDURE

Figure 3. Demo Setup with PC

Figure 4. Efficiency vs Load Current at

VIN = 12V, VOUT = 1V, fSW = 425kHz

Figure 5. Transient Response at VIN = 12V,

VOUT = 1V, fSW = 425kHz

0 20 40 60 80 100 120

EFFICIENCY (%)

LOAD CURRENT (A)

DC2605A F04

DC2605A F05

VOUT MEASURED AT BNC J11 (20MHz BW) (20mV/DIV)

0A TO 30A LOAD STEP

dc2605af

DEMO MANUAL DC2605A

QUICK START PROCEDURE

Figure 6. Current Sharing vs Load Current at VIN = 12V, VOUT = 1V, fSW = 425kHz

0 20 40 60 80 100 120

LOAD CURRENT PER PHASE (A)

TOTAL LOAD CURRENT (A)

DC2605A F06

PHASE #4

PHASE #3

PHASE #2

PHASE #1

Figure 7. Thermal Performance at VIN = 12V, VOUT = 1V, IOUT = 120A, TA= 23°C, No Forced Airflow

dc2605af

DEMO MANUAL DC2605A

LTpowerPlay is a powerful Windows based development

environment that supports Linear Technology power sys-

tem management ICs, including the LTM4676, LTC3880,

LTC3883, LTC3884/LTC3884-1, LTC2974 and LTC2978

etc. The software supports a variety of different tasks. You

can use LTpowerPlay to evaluate Linear Technology ICs

by connecting to a demo board system. LTpowerPlay can

also be used in an offline mode (with no hardware pres-

ent) in order to build a multichip configuration file that

can be saved and reloaded at a later time. LTpowerPlay

provides unprecedented diagnostic and debug features. It

becomes a valuable diagnostic tool during board bring-up

to program or tweak the power manage-ment scheme in

a system, or to diagnose power issues when bringing up

rails. LTpowerPlay utilizes the DC1613A USB-to-SMBus

controller to communicate with one of many potential

targets, including the LTM4676, the LTC3880, LTC3884

and the LTC3883’s demo system, or a customer board.

The software also provides an automatic update feature

to keep the software current with the latest set of device

drivers and documentation. The LTpowerPlay software

can be downloaded from:

http://linear.com/ltpowerplay

To access technical support documents for LTC Digital

Power Products visit Help. View online help on the LTpow-

erPlay menu.

LTPOWERPLAY SOFTWARE GUI

Figure 8. LTpowerPlay Main Interface

dc2605af

DEMO MANUAL DC2605A

LTPOWERPLAY QUICK START PROCEDURE

The following procedure describes how to use LTpower-

Play to monitor and change the settings of LTC3884-1.

1. Download and install the LTPowerPlay GUI:

http://linear.com/ltpowerplay

2. Launch the LTpowerPlay GUI.

a. The GUI should automatically identify the DC2605A.

The system tree on the left hand side should look like

this:

b. A green message box shows for a few seconds in the

lower left hand corner, confirming that LTC3884-1 is

communicating:

c. In the Toolbar, click the “R” (RAM to PC) icon to read the

RAM from the LTC3884-1. This reads the configuration

from the RAM of LTC3884-1 and loads it into the GUI.

d. If you want to change the output voltage to a different

value, like 1.2V. In the Config tab, type in 1.2 in the

VOUT_COMMAND box, like this:

dc2605af

DEMO MANUAL DC2605A

LTPOWERPLAY QUICK START PROCEDURE

Then, click the “W” (PC to RAM) icon to write these regis-

ter values to the LTC3884-1. After finishing this step, you

will see the output voltage will change to 1.2V.

If the write is successful, you will see the following mes-

sage:

e. You can save the changes into the NVM. In the tool bar,

click “RAM to NVM” button, as following

f. Save the demo board configuration to a (*.proj) file.

Click the Save icon and save the file with a user file-

name.

dc2605af

DEMO MANUAL DC2605A

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 16 CIN1, CIN2, CIN3, CIN4, CIN5, CIN6,

CIN7, CIN8, CIN9, CIN10, CIN11, CIN12,

CIN13, CIN14, CIN15, CIN16

CAP. 22µF X7R 25V 10% 1210 MURATA GRM32ER71E226KE15K

2 17 COUT1, COUT2, COUT5, COUT6,

COUT10, COUT11, COUT12, COUT16,

COUT19, COUT20, COUT24, COUT25,

C30, C34, C35, COUT41, C44

CAP. 100µF X5R 6.3V 20% 1210 AVX, 12106D107MAT2A

3 8 COUT3, COUT4, COUT7, COUT8,

COUT9, COUT13, COUT14, COUT15

CAP. 470µF 20% 2.5V TANT. POLYMER PANASONIC ETPF470M5H

4 5 C7, C19, COUT26, C41, C42 CAP. 1µF X5R 25V 20% 0603 AVX 06033D105MAT2A

5 1 C1 CAP. 2.2µF X5R 6.3V 20% 0603 TDK C1608X5R0J225M

6 4 C2, C52, C53, C54 CAP. 270µF 20% 16V OSCON PANASONIC 16SVPC270M

7 1 C3 CAP. 2.2µF X7S 16V 20% 0603 MURATA, GRM188C71C225KE11D

8 4 C4, C6, C18, C20 CAP. 4.7µF X5R 10V 10% 0603 AVX 0603ZD475KAT2A

9 4 C9, C16, C21, C33 CAP. 220nF X7R 25V 10% 0603 TDK C1608X7R1E224K

10 1 C12 CAP. 330pF C0G 50V 5% 0603 MURATA GRM1885C1H331JA01D

11 1 C13 CAP. 6.8nF X7R 50V 10% 0603 MURATA GRM188R71H682KA01B

12 3 C14, C17, C28 CAP. 10nF X7R 25V 10% 0603 AVX 06033C103KAT2A

13 1 C23 CAP. 22pF C0G 50V 5% C0G 0603 MURATA GRM1885C1H220JA01B

14 8 C29, C181, C186, C188, C192, C194,

C198, C200

CAP. 0.47µF X5R 10V 10% 0402 MURATA GRM155R61A474KE15D

15 1 C31 CAP. 10µF X7R 16V 10% 1210 MURATA GRM32DR71C106KA01L

16 2 C39, C50 CAP. 100nF X7R 16V 20% 0603 AVX 0603YC104MAT2A

17 1 C40 CAP. 150pF X7R 50V 10% 0603 AVX 06035C151KAT2A

18 1 C43 CAP. 220pF X7R 50V 10% 0603 AVX 06035C221KAT2A

19 1 C49 CAP. 47nF X7R 25V 10% 0603 AVX 06033C473KAT2A

20 8 C75, C185, C190, C191, C196, C197,

C202, C203

CAP. 4.7µF X5R 10V 10% 0402 TDK C1005X5R1A475K

21 4 C184, C189, C195, C201 CAP. 330pF X7R 50V 10% 0402 AVX 04025C331KAT2A

22 4 C204, C205, C206, C207 CAP. 1µF X5R 10V 10% 0402 TDK C1005X5R1A105K

23 2 D6, D9 LED 0603 GREEN WURTH ELEKTRONIK

150060GS75000

24 1 D7 LED 0603 RED WURTH ELEKTRONIK

150060SS75000

25 1 D13 DIODE ULTRA LOW SCHOTTKY RECTIEIER NEXPERIA PMEG2005AEL,315

26 4 L1, L2, L3, L4 Power inductor EATON., FP1007R3-R22-R

27 1 L5 IND 68µH Shielded Inductor 1.6A 201 mΩ SUMIDA, CDRH105RNP-680NC

28 2 Q9, Q10 XSTR 40V PNP SMALL SIGNAL TRANSISTOR IN

SOT323

DIODES INC, MMST3906-7-F

28 2 Q9, Q10 XSTR 40V PNP SMALL SIGNAL TRANSISTOR IN

SOT323

DIODES INC, MMST3906-7-F

29 2 Q20, Q29 XSTR P-CHANNEL ENHANCEMENT MODE MOSFET DIODES INC, DMP3130L-7

30 2 Q21, Q26 XSTR N-CHANNEL TRANSISTOR FAIRCHILD 2N7002K

31 2 Q23, Q24 XSTR MOSFET N-CHANNEL 40V VISHAY SUD50N04-8M8P-4GE3

dc2605af

DEMO MANUAL DC2605A

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

32 1 R1 RES. 0.001Ω 1% 1W 2512 VISHAY WSL25121L000FEA

33 1 R2 RES. 1Ω 1% 1/10W 0603 VISHAY CRCW06031R0FKEA

34 15 R3, R4, R30, R51, R52, R56, R87, R91,

R113, R114, R117, R127, R137, R138,

R148

RES. 0Ω 1/10W 0603 VISHAY CRCW06030000Z0EA

35 3 R5, R16, R70 RES. 10Ω 1% 1/10W 0603 VISHAY CRCW060310R0FKEA

36 7 R6, R8, R10, R29, R34, R98, R123 RES. 10kΩ 1% 1/10W 0603 VISHAY CRCW060310K0FKEA

37 3 R9, R128, R150 RES. 4.99kΩ 1% 1/10W 0603 VISHAY CRCW06034K99FKEA

38 3 R11, R12, R13 RES. 1kΩ 1% 1/10W 0603 VISHAY CRCW06031K00FKEA

39 4 R14, R20, R135, R143 RES. 649Ω 1% 1/10W 0603 VISHAY CRCW0603649RFKEA

40 24 R43, R124, R129, R162, R164, R171,

R173, R175, R176, R177, R186, R188,

R190, R191, R192, R202, R203, R205,

R206, R207, R212, R214, R216, R218

RES. 0Ω 1/10W 0402 VISHAY CRCW04020000Z0EA

41 2 R49, R89 RES. 2Ω 1% 1/10W 0603 VISHAY CRCW06032R0FKEA

42 1 R55 RES. 100KΩ 5% 1/10W 0603 VISHAY CRCW0603100KJNEA

43 3 R95, R96, R107 RES. 20kΩ 1% 1/10W 0603 VISHAY CRCW060320K0FKEA

44 2 R79, R130 RES. 402Ω 1% 1/10W 0603 VISHAY CRCW0603402RFKTA

45 1 R81 RES. 255Ω 1% 1/10W 0603 VISHAY CRCW0603255RFKEA

46 1 R85 RES. 27.4Ω 1% 2512 VISHAY CRCW06033R30FKEA

47 1 R92 RES. 3.3Ω 1% 1/10W 0603 VISHAY CRCW06033R30FKEA

48 1 R93 RES. 154kΩ 1% 1/10W 0603 VISHAY CRCW0603154KFKEA

49 1 R94 RES. 1MΩ 5% 1/10W 0603 VISHAY CRCW06031M00JNEA

50 1 R97 RES. 681kΩ 1% 1/10W 0603 VISHAY CRCW0603681KFKEA

51 1 R99 RES. 301Ω 5% 1/10W 0603 VISHAY CRCW0603301RFKEA

52 1 R100 RES. 82.5Ω 5% 1/10W 0603 VISHAY CRCW060382R5FKEA

53 2 R101, R102 RES. 0.01Ω 1%2512 VISHAY WSL2512R0100FEA

54 1 R103 RES. VARIABLE 5K BOURNS 3386P-1-502-LF

55 1 R104 RES. 1.21kΩ 1% 1/10W 0603 VISHAY CRCW06031K21FKEA

56 2 R105, R106 RES. 118kΩ 1% 1/10W 0603 VISHAY CRCW0603118KFKEA

57 4 R147 RES. 15.8kΩ 1% 1/10W 0603 VISHAY CRCW060315K8FKEA

58 4 R163, R172, R187, R201 RES. 10kΩ 1% 1/10W 0402 VISHAY CRCW040210K0FKED

59 1 U1 IC. Dual Output PolyPhase Step-Down Controller with

Sub-Milliohm DCR Sensing and Digital Power System

Management

LINEAR TECH.LTC3884ERHE-

1#10GV-1PBF-ES

60 1 U2 IC. PolyPhase Step-Down Synchronous Slave Controller

with Sub-Milliohm DCR Sensing

LINEAR TECH.LTC3874EUF-1

61 1 U4 IC. High Efficiency, 65V 500mA Synchronous

Step-Down Converter

LINEAR TECH. LTC3630EMSE#PBF

62 1 U5 IC. Voltage-Controlled Pulse Width Modulator LINEAR TECH. LTC6992IS6-1#PBF

63 1 U6 IC. Single 100V/µs,85MHz, Rail-to-Rail Input and

Output Op Amps

LINEAR TECH. LT1803IS5#PBF

64 1 U8 IC. SERIAL EEPROM MICROCHIP 24LC024-I/ST

65 4 U15, U16, U17, U18 DrMOS Fairchild FDMF3170

Ce manuel convient aux modèles suivants

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