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reference designLT8374 | Demoboard EVAL-LT8374-AZ

Analog Devices LT8374 | Demoboard EVAL-LT8374-AZ

60V, 1.2A Synchronous Step-Down LED Driver

Overview

TopologyBuck Converter
Input voltage42-57 V
Output 136 V / 1.2 A

Description

Evaluation board EVAL-LT8374-AZ is a synchronous stepdown LED driver featuring the LT8374. It drives up to 36V of LEDs at 1.2A when the EMIVIN terminal is between 42V and 57V. EVAL-LT8374-AZ runs at 330kHz switching frequency and features options for spread-spectrum frequency modulation (SSFM) or external synchronization.The LT8374 has an input voltage range of 6.5V to 60V. It features 60V synchronous internal power switches for high efficiency and small solution size. The switching frequency of LT8374 is fixed at 330kHz, and the device can be synchronized with an external clock source or configured with internal SSFM for low EMI. With SSFM enabled, the LT8374 modulates its switching frequency between 330kHz and 410kHz to reduce switching emissions. EVALLT8374- AZ includes a SYNC/SSFM jumper to configure the LT8374 for either external synchronization, SSFM, or set to normal operation.

Features

  • Low Component Count and Simple Solution
  • Wide Input Voltage Range: 6.5V to 60V
  • 0V to 59V LED String Voltage
  • ±3% LED Current Regulation
  • Spread-Spectrum Frequency Modulation
  • Internal Compensation Capacitor
  • 20:1 Analog, Duty Cycle or PWM LED Current Control
  • 330kHz/2MHz Fixed Internal Frequency (LT8374/LT8374-1)
  • External Frequency Synchronization
  • 4mm × 4mm 16-Pin Side Solderable QFN Package
  • AEC-Q100 Qualified for Automotive Applications

Typical applications

  • Automotive Lighting, Matrix LED Lighting, General Purpose LED Driver
  • Current Sources

More information

Products

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IRP,40K(A)
ISAT,30%(A)
RDC typ.(mΩ)
fres(MHz)
VOP(V)
Pins
Type
Mount
L(mm)
H(mm)
IR(A)
Working Voltage(V (AC))
Operating Temperature
SamplesAvailability & Sample
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74438324047
SPECWE-MAPI SMT Power Inductor, 4.7 µH, 1.45 A
Simu­lation
Availability
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Downloads10 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWE-MAPI SMT Power Inductor
Inductance4.7 µH
Performance Rated Current1.45 A
Saturation Current @ 30%2.65 A
DC Resistance300 mΩ
Self Resonant Frequency35 MHz
Operating Voltage80 V
Pins2 
–
MountSMT 
Length2.5 mm
Height1.2 mm
Rated Current1 A
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Operating Temperature -40 °C up to +125 °C
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60800213421
SPECWR-PHD Jumper, –, –
Simu­lation–
Availability
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Downloads3 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-PHD Jumper
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Pins2 
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–
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Rated Current3 A
Working Voltage200 V (AC)
Operating Temperature -25 °C up to +105 °C
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62000621121
SPECWR-PHD Pin Header, –, –
Simu­lation–
Availability
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Downloads7 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWR-PHD Pin Header
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Pins6 
TypeStraight 
MountTHT 
Length6 mm
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Rated Current2 A
Working Voltage200 V (AC)
Operating Temperature -40 °C up to +105 °C
–Check availability