Analog Devices Linear SCP-LT8362-S-EVALZ Kurzanleitung zur Einrichtung

DEMO MANUAL SCP-LT8362-S-EVALZ

Rev. 0

DESCRIPTION

Demonstration circuit SCP-LT8362-S-EVALZ features the

LT 8 3 6 2 in a SEPIC configuration. It operates with a switch-

ing frequency of 2MHz and has an output voltage of 12V.

Like all boards in the Signal Chain Power series, this board

is designed to be easily plugged into other SCP boards to

form a complete signal chain power system, enabling fast

evaluation of low power signal chains. To evaluate this

board, some universal SCP hardware is required, namely:

SCP-INPUT-EVALZ SCP-FILTER-EVALZ

SCP-OUTPUT-EVALZ SCP-1X2BKOUT-EVALZ

SCP-1X5BKOUT-EVALZ SCP-5X1-EVALZ

SCP-THRUBRD-EVALZ

To properly evaluate SCP series demo boards, you will

need the SCP Configurator companion software. SCP

Configurator can help you choose the right board and to-

pology for your design.

Note that this Demo Manual does not cover details im-

portant to the operation and configuration regarding the

LT8362. Please refer to the LT 8 3 6 2 d ata s h e e t for a com-

plete description of the part.

Design files for this circuit board are available.

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

Table 1.

Performance Summary

SYMBOL

PARAMETER

NOTES

MIN

TYP

MAX

UNITS

IN(MAX)

Max Input Voltage

OUT(MAX)

Max Output Voltage

OUT(MAX)

Max Output Current

BOARD IMAGE

Figure 1. SCP-LT 8 3 6 2 -S-EVALZ Board

DEMO MANUAL

SCP-LT8362-S-EVALZ

Signal Chain Power

LT8362 Low I

SEPIC Converter

DEMO MANUAL SCP-LT8362-S-EVALZ

Rev. 0

QUICK START PROCEDURE

Demonstration circuit

SCP-LT8362-S-EVALZ

is easy to

set up to evaluate the performance of any SCP hard-

ware configuration.

1. The SCP-LT8362-S-EVALZ ships with a default output

voltage of 12V. To c h a n g e t h e o u t p u t v o l t a g e , s e e “ C o n -

figuration Settings” section, and modify the board ac-

cordingly. Be sure to check for open connections or sol-

der shorts after making any modifications.

2. Connect the SCP-INPUT-EVALZ and SCP-OUTPUT-

EVALZ boards to the SCP-LT8362-S-EVALZ (refer to

Figure 2) and connect the input board to a voltage

source, V

SOURCE

. Connect the output board to a volt-

meter or dynamic load. Slowly raise the input voltage

until the SCP-LT8362-S-EVALZ powers up into regula-

tion and sweep V

SOURCE

through the desired range of

operation.

NOTE: Make sure that the input voltage is always within

spec. If using a dynamic load to measure output volt-

age, make sure the load is initially set to zero.

3. Check for proper output voltage. The output should be

regulated at the programmed value (±5%).

4. Once the proper output voltage is established, power

off V

SOURCE

and similarly test other boards in the SCP

system until all elements have been individually verified

prior to assembling into the final circuit configuration.

NOTE: When measuring the input or output voltage rip-

ple, use the optional SMA connector locations available

on the input, output, 1

5, 1

2, and 5

1 breakout

boards. Avoid using the test point connections with

long scope leads.

Figure 2. Proper Measurement Equipment Setup (Use SMA connectors for Measuring Input or Output Ripple)

DEMO MANUAL SCP-LT8362-S-EVALZ

Rev. 0

CONFIGURATION SETTINGS

Demonstration circuit SCP-LT8362-S-EVALZ features the

LT 8 3 6 2 i n a SEPIC configuration. It operates with a switch-

ing frequency of 2MHz and has an output voltage of 12V.

The output of the SCP-LT8362-B-EVALZ is resistor-pro-

grammable from 5V to 48V. The board can be also config-

ured to drive VIOC-capable LDO regulators.

OUTPUT VOLTA G E PROGRAMMING

Table 2.

Resistor Selection Guide for Common Output Voltages

OUT

(V)

R6 (Ω)

R8 (Ω)

5.0

24.3K

11.5K

6.0

31.6K

11.5K

7.0

115K

34.0K

8.0

102K

25.5K

9.0

118K

25.5K

10.0

105K

20.0K

11.0

107K

18.2K

12.0

71.5K

11.0K

13.0

97.6K

13.7K

14.0

78.7K

10.2K

15.0

115K

13.7K

16.0

102K

11.3K

17.0

162K

16.9K

18.0

205K

20.0K

19.0

150K

13.7K

20.0

115K

10.0K

21.0

243K

20.0K

22.0

255K

20.0K

23.0

226K

16.9K

24.0

140K

10.0K

25.0

215K

14.7K

30.0

442K

24.9K

35.0

287K

13.7K

40.0

255K

10.7K

45.0

374K

13.7K

48.0

309K

10.7K

EN/UVLO PIN CONFIGURATION

The EN/UVLO pin is tied to the optional SCP Run/Se-

quence header P1. To create a harness for this function,

use Molex part # 0510650300 with crimp pin # 50212-

8000.

To use an active run signal, use a 1.00M for either pull-up

or pull-down resistors R1 and R3, short R13 with 0

, and

use the drive signal from connector P1.

If precision UVLO operation is desired, program enable di-

vider R5 and R6 such that:

The LT8330 has an accurate 1.60V threshold which places

the part into under voltage lockout. The hysteresis thresh-

old on the rising edge is typically 80mV and scales by the

factor:

VOLTAGE INPUT-TO-OUTPUT CONTROL (VIOC)

IMPLEMENTATION

To implement the VIOC function for this regulator, set R27

to 0

. Refer to the “Configuration Settings” section in the

Demo Manual for the LDO board and use the following

configuration for this board.

Table 3.

VIOC Cross-Reference Designators

VIOC SETTING REFERENCES

BOT

TOP

MAX

OUT

Reference Designators

R14

SINK

is the current through R

MAX

, typically 15µA, so R

BOT

should be sized such that the divider current runs a mini-

mum of 100µA to minimize the I

SINK

error term.

VOUT =1 .6 VFBX 1+R6

⎛

⎝

⎜⎞

⎠

⎟

R6 =1 0 k −1 0 0 k,nominal

R5 =R6 VIN −1 .6 0 VTH

1 .6 0 VTH

⎛

⎝

⎜⎞

⎠

⎟

VHYST =80mV R5 +R6

⎛

⎝

⎜⎞

⎠

⎟

VL DOIN −VL DOOUT =VVIOC =1 .6 0 VFB

RBOT +RTOP

RBOT

⎛

⎝

⎜⎞

⎠

⎟

VMAX

( )

LDOIN =1 .6 0 VFB

RBOT +RTOP +RMAX

RBOT

⎛

⎝

⎜⎞

⎠

⎟+ISINKRMAX

DEMO MANUAL SCP-LT8362-S-EVALZ

Rev. 0

MODE PIN CONFIGURATION

The SCP-LT8362-B-EVALZ is configured by default for

Burst Mode at light loads for efficiency. The MODE pin can

also be configured to burst with spread spectrum, if de-

sired. The table below shows the various configurations

possible with the MODE pin.

Table 4.

Settings for MODE Pin Configuration

MODE

R12

Burst Mode

Open

Burst/Spread Spectrum

100k

Open

Pulse Skip

Open

Pulse Skip/Spread Spectrum

Open

Clock Sync/Pulse Skip

Open

If the clock synchronization option is desired, the SCP-

LT8362-B-EVALZ can be driven from an external source

via the optional SMA connector J1.

DEMO MANUAL SCP-LT8362-S-EVALZ

Rev. 0

PARTS LIST

ITEM

QTY

REFERENCE

PART DESCRIPTION

MANUFACTURER/PART NUMBER

PCB

ANALOG DEVICES 08_051143b

CAP MULTILAYER CER, X7R

TAIYO YUDEN HMK316B7105KL-T

C11, C12

CAP CER 0.1UF 50V 10% X5R 0402

YAGEO CC0402KRX5R9BB104

C14

CAP ALUM 33UF 50V 20% 6.6X6.6MM

UNITED CHEMI CON

EMVH500ADA330MF80G

C2, C4

CAP CER 10UF 50V X5R 1206

SAMSUNG CL31A106MBHNNNE

CAP MLCC 1206 (Note 1)

N/A

C5, C8, C13

CAP MLCC 0603 (Note 1)

N/A

CAP CER X7R

WURTH ELEKTRONIK885012000000

C7, C10

CAP CER 1UF 50V 10% X5R 0603

SAMSUNG CL10A105KB8NNNC

CAP CER X7R, GENERAL PURPOSE

WURTH ELEKTRONIK885012000000

D1, D2

DIO SCHOTTKY (Note 1)

N/A

DIO SCHOTTKY BARRIER RECTIFIER, 2A

DIODES INCORPORATED DFLS260-7

INPUT

CONN-PCB MALE HEADER 3POS 2.54MM PITCH R/A GOLD

SULLINS PBC03SBAN

CONN-PCB STRAIGHT SMA PCB DIE CAST (Note 1)

TE CONNECTIVITY LTD 5-1814832-1

IND POWER WIREWOUND 1.25A, 0.146OHM DCR

WURTH ELEKTRONIK74489430068

IND POWER (Note 1)

N/A

OUTPUT

CONN FEMALE 3POS 2.54MM PITCH R/A GOLD

SULLINS PPPC031LGBN-RC

CONN-PCB 3POS HEADER WIRE TO BRD WAFER ASSY STRAIGHT

2MM PITCH (Note 1)

MOLEX 53253-0370

RES THICK FILM CHIP, GENERAL PURPOSE

YAGEO RC0805JR-071ML

R10

RES PRECISION THICK FILM CHIP

PANASONIC ERJ-6ENF2002V

R2, R12, R27

RES THICK FILM 0805 (Note 1)

N/A

R3, R13

RES THICK FILM 0805 (Note 1)

N/A

R4, R14

RES STANDARD THICK FILM CHIP JUMPER, FOR AUTOMOTIVE

VISHAY CRCW08050000Z0EA

RES PRECISION THICK FILM CHIP

PANASONIC ERJ-6ENF1004V

RES SMD 154K OHM 0.1% 1/8W 0805, AUTOMOTIVE

PANASONIC ERA-6AEB1543V

RES PRECISION THIN FILM CHIP

VISHAY PAT0805E4022BST1

IC LOW IQ BOSS/SEPIC/INVERTING CONVERTER WITH 2A, 60V

LINEAR TECHNOLOGY LT8362EDD#PBF

VIOC

CONN FEMALE 2POS 2.54MM PITCH R/A GOLD

SULLINS PPPC021LGBN-RC

Note 1.

These items are not stuffed (DNI).

DEMO MANUAL SCP-LT8362-S-EVALZ

Rev. 0

SCHEMATIC DIAGRAM

JTAG

PULSE SKIPPING

PULSE SKIPPING/SSFM

LT8362 SEPIC

FEMALE

GND

BURST/SSFM-100KOHMBURST-0OHM;

SYNC

GND

MALE

5-1814832-1

53253-0370

0.22 UF

DNI

1UF

50V

50V0. 1UF

DFLS260-7

DNI

10UF 10 UF

50V

PPPC031LGBN-RC

PPPC021LGBN-RC

DNI

1MEG

6.8UH

10 UF

1MEG

TBD0805

DNI

33UF

TBD0805

PBC03SBAN

DNI0

DNI

TBD0603154K

1UF

50V

40.2K

1.5NF

25V

DNI

TBD0603

20K

25V

0DNI

DNIDFLS260-7

DNI

DFLS260-7

100V1UF

DNI

LT8362EDD#PBF

J VIERNES

02_051143 B

1:1

HW TYPE : SCP EVAL-Z

Product(s): LT8362

: LT8362

<DESIGN_VIEW>

3 4

6.8UH50V50 V

C12

C11

R15

C3 C2

R2 4

R2 5 OU TPUT

R2 6

R2 2

R2 1

R2 3

VIOC

R20R19R18R17R16

R27

R1 4

C14

R1 3

INPUT

C1 3R8

R 10

R1 2

C1 0

OUT

SYNC

RUN VO-

VO+

RUN

SYNC

INTVCC

OUT

VIOC

V+

INTVCC

PAD

1 0

AGND

AGN D

GND

SYN C/MODE

FBX

BIAS

INTVCC

VIN

EN/U VLO

AGN D

AGND

AGN D

AGND

AGN D

THIS DRAWING IS THE PROPERTY OF ANALOG DEVICES INC.

IN PART, OR USED IN FURNISHI NG INFORMATION TO OTHERS,

OR FOR ANY OTHER PURPOSE DETRIMENTAL TO THE INTERESTS

THE EQUIPMENT SHOWN HEREON MAY BE PROTECTED BY PATENTS

IT IS NOT TO BE REPRODUCED OR COPIED, IN WHOLE OR

DRAWING NO.

SCALE

SIZE

REV

SHEET

APPROVED

DESCRIPTION

REVISIONS

OL G

OWNED OR CONTROLLED BY OWNED ANALOG DEVICES.

OF ANALOG DEVICES.

SCHEMATIC

PTD ENGI NEER

DESIGN VI EW

REV DATE

DEMO MANUAL SCP-LT8362-S-EVALZ

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog

Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Speciﬁcations

subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

DEMO MANUAL SCP-LT8362-S-EVALZ

Rev. 0

1/21

www.analog.com

ESD Caution

ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection

circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.

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