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EVAL-LT8355-1-AZ Dual LED Controller Evaluation Board

Evaluation board for the LT8355-1, a 60V dual LED controller featuring boost and buck-boost channels, SSFM for low EMI, and multiple dimming options.

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Overview

The EVAL-LT8355-1-AZ is a high-voltage dual LED controller evaluation board featuring the LT8355-1. It is configured with two channels: Channel 1 as a boost LED driver delivering up to 72V at 450mA, and Channel 2 as a buck-boost mode LED driver delivering up to 30V at 1A. The board operates from an input voltage range of 8V to 18V and utilizes a 250kHz switching frequency with Spread Spectrum Frequency Modulation (SSFM) to minimize EMI, meeting CISPR25 Class 5 standards. It supports internal PWM dimming (up to 128:1), external PWM dimming, and analog dimming. Integrated safety features include undervoltage lockout (UVLO), open LED overvoltage protection (OVP), and short LED fault reporting. The LT8355-1 is AEC-Q100 qualified for automotive applications.

Use Cases

  • Automotive LED Lighting
  • High-Voltage LED String Driving
  • Dual-Channel Dimming Systems
  • Low EMI LED Driver Applications

Topics

LT8355-1
EVAL-LT8355-1-AZ
Dual LED Controller
Boost LED Driver
Buck-Boost LED Driver
Spread Spectrum Frequency Modulation
SSFM
CISPR25 Class 5
PWM Dimming
Analog Dimming
AEC-Q100
Analog Devices

Referenced Parts

575-4

Keystone Electronics

CONN., BANANA JACK, FEMALE, THT, NON-INSULATED

8833

Keystone Electronics

STANDOFF, NYLON, SNAP-ON, 0.50"

EEEHAE101XAP

Panasonic

CAP., 100μF, ALUM ELECT, 25V, 20%, 6.3mm × 7.7mm

FMMT593QTA

Diodes Incorporated

XSTR., PNP, 100V, 1A, SOT-23-3, AEC-Q101

PDS3100Q-13

Diodes Incorporated

DIODE, SCHOTTKY, 100V, 3A, POWERDI5, AEC-Q101

WU732B15TTD12L0F

KOA Speer

RES., 0.012Ω, 1%, 1.5W, 1206, LONG-SIDE TERM, METAL

GCM155R71H102KA37D

Murata Manufacturing

CAP., 1000pF, X7R, 50V, 10%, 0402, AEC-Q200

GCM32DC72A475KE02L

Murata Manufacturing

CAP., 4.7μF, X7S, 100V, 10%, 1210, AEC-Q200

GCM32EC71H106KA03L

Murata Manufacturing

CAP., 10μF, X7S, 50V, 10%, 1210, AEC-Q200

ERJ8BQFR56V

Panasonic

RES., 0.56Ω, 1%, 1/2W, 1206, SENSE

LTR18EZPFSR013

Rohm Semiconductor

RES., 0.013Ω, 1%, 1W, 1206, LONG-SIDE TERM, SENSE

SQJ211ELP-T1_GE3

Vishay

XSTR., MOSFET, P-CH, 100V, 33.6A, POWERPAK SO-8L

SQJA72EP-T1_GE3

Vishay

XSTR., MOSFET, N-CH, 100V, 37A, POWERPAK SO-8L

360002

Wurth Elektronik

OPTION, WE-SHC SHIELDIY 61.5mm × 61.5mm

36900000

Wurth Elektronik

OPTION, WE-SHC CABINET CLIP 6.5mm × 0.8mm × 1.27mm

AEC-Q100

Analog Devices

35 1 U1 IC, DUAL LED CONTROLLER, QFN-28, AEC-Q100 ANALOG DEVICES, LT8355IUFDM-1#WPBF

AEC-Q101

Diodes

16 1 Q2 XSTR., PNP, 100V, 1A, SOT-23-3, AEC-Q101 DIODES INC., FMMT593QTA

AEC-Q101

Diodes

11 2 D1, D4 DIODE, SCHOTTKY, 100V, 3A, POWERDI5, AEC-Q101 DIODES INC., PDS3100Q-13

AEC-Q200

Murata

3 1 C8 CAP., 1000pF, X7R, 50V, 10%, 0402, AEC-Q200 MURATA, GCM155R71H102KA37D

AEC-Q200

Murata

4 4 C9-C11, C36 CAP., 4.7μF, X7S, 100V, 10%, 1210, AEC-Q200 MURATA, GCM32DC72A475KE02L

AEC-Q200

Panasonic

32 1 RS2 RES., 0.56Ω, 1%, 1/2W, 1206, SENSE, AEC-Q200 PANASONIC, ERJ8BQFR56V

AEC-Q200

Panasonic

28 1 R47 RES., 10k, 1%, 1/10W, 0402, AEC-Q200 PANASONIC, ERJ2RKF1002X

AEC-Q200

Panasonic

23 1 R14 RES., 0Ω, 1/10W, 0402, AEC-Q200 PANASONIC, ERJ2GE0R00X

AEC-Q200

TDK

41 1 C49 CAP., 0.1μF, X7R, 50V, 10%, 0603, AEC-Q200 TDK, CGA3E2X7R1H104K080AA

AEC-Q200

TDK

8 1 C34 CAP., 680pF, X7R, 50V, 10%, 0402, AEC-Q200 TDK, CGA2B2X7R1H681K050BA

AEC-Q200

TDK

2 1 C7 CAP., 1μF, X7R, 25V, 10%, 0805, AEC-Q200 TDK, CGA4J3X7R1E105K125AB

AEC-Q200

TDK

39 2 C15, C43 CAP., 0.1μF, X7S, 100V, 10%, 0603, AEC-Q200 TDK, CGA3E3X7S2A104K080AB

AEC-Q200

TDK

38 4 C5, C6, C30, C45 CAP., 10μF, X7R, 25V, 10%, 1210, AEC-Q200 TDK, CGA6P1X7R1E106K250AC

AEC-Q200

Taiyo Yuden

6 4 C22, C23, C31, C32 CAP., 4.7μF, X7R, 25V, 10%, 1210, AEC-Q200 TAIYO YUDEN, TMF325B7475KMHP

AEC-Q200

Taiyo Yuden

7 1 C33 CAP., 2.2μF, X5R, 10V, 10%, 0603, AEC-Q200 TAIYO YUDEN, LMK107BJ225KAHT

AEC-Q200

Taiyo Yuden

5 2 C14, C42 CAP., 2.2μF, X5R, 25V, 10%, 0603, AEC-Q200 TAIYO YUDEN, TMK107BBJ225KAHT

AEC-Q200

Taiyo Yuden

9 1 C35 CAP., 4.7μF, X5R, 10V, 10%, 0603, AEC-Q200 TAIYO YUDEN, LMK107BJ475KAHT

AEC-Q200

Vishay

45 2 R7, R41 RES., 10Ω, 5%, 1/10W, 0603, AEC-Q200 VISHAY, CRCW060310R0JNEA

AEC-Q200

Vishay

24 1 R33 RES., 499k, 1%, 1/10W, 0603, AEC-Q200 VISHAY, CRCW0603499KFKEA

AEC-Q200

Vishay

30 1 R53 RES., 10k, 5%, 1/16W, 0402, AEC-Q200 VISHAY, CRCW040210K0JNED

AEC-Q200

Vishay

29 1 R52 RES., 287k, 1%, 1/16W, 0402, AEC-Q200 VISHAY, CRCW0402287KFKED

AEC-Q200

Vishay

27 1 R42 RES., 30k, 1%, 1/16W, 0402, AEC-Q200 VISHAY, CRCW040230K0FKED

AEC-Q200

Vishay

18 4 R5, R13, R39, R43 RES., 100k, 5%, 1/16W, 0402, AEC-Q200 VISHAY, CRCW0402100KJNED

AEC-Q200

Vishay

25 1 R34 RES., 127k, 1%, 1/16W, 0402, AEC-Q200 VISHAY, CRCW0402127KFKED

AEC-Q200

Vishay

17 3 R1, R35, R36 RES., 100k, 1%, 1/16W, 0402, AEC-Q200 VISHAY, CRCW0402100KFKED

AEC-Q200

Vishay

26 1 R40 RES., 86.6k, 1%, 1/10W, 0603, AEC-Q200 VISHAY, CRCW060386K6FKEA

AEC-Q200

Vishay

20 2 R9, R49 RES., 10Ω, 5%, 1/16W, 0402, AEC-Q200 VISHAY, CRCW040210R0JNED

AEC-Q200

Yageo

34 1 RS4 RES., 0.25Ω, 1%, 1/2W, 1206, SENSE, AEC-Q200 YAGEO, PT1206FR-7W0R25L

AEC-Q200

Yageo

19 1 R8 RES., 39k, 1%, 1/16W, 0402, AEC-Q200 YAGEO, AC0402FR-0739KL

AEC-Q200

Yageo

21 1 R10 RES., 15k, 1%, 1/16W, 0402, AEC-Q200 YAGEO, AC0402FR-0715KL