IC manufacturers Analog Devices

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Analog Devices LT8376

60V, 3A Synchronous Step-Down LED Driver with Silent Switcher

Overview

TopologyBuck Converter
Input voltage3.6-60 V
Switching frequency200-2000 kHz
Output 160 V / 3 A

Description

The LT8376 is a monolithic, synchronous, step-down DC/DC converter that utilizes fixed-frequency, peak current control and provides PWM dimming for a string of LEDs. The LED current is programmed by an analog voltage or the duty cycle of pulses at the CTRL pin. An output voltage limit can be set with a resistor divider to the FB pin.The switching frequency is programmable from 200kHz to 2MHz by an external resistor at the RT pin or by an external clock at the SYNC/SPRD pin. With the optional spread spectrum frequency modulation enabled, the frequency varies from 100% to 125% to reduce EMI. The LT8376 also includes a driver for an external, high side PMOS for PWM dimming and an internal PWM signal generator for analog control of PWM dimming when an external signal is not available.Additional features include an LED current monitor, an accurate EN/UVLO pin threshold, open-drain fault reporting for open-circuit and short-circuit load conditions, and thermal shutdown. The LT8376 utilizes the proprietary Silent Switcher technology for very low EMI.

Features

  • ±1.5% LED Current Regulation
  • ±2% Output Voltage Regulation
  • 5000:1 PWM Dimming at 100Hz
  • 128:1 Internal PWM Dimming
  • Spread-Spectrum Frequency Modulation
  • Silent Switcher® Architecture for Low EMI
  • 3.6V to 60V Input Voltage Range
  • 0V to 60V LED String Voltage
  • 3A, 60V Internal Switches
  • 200kHz to 2MHz with SYNC Function
  • 99.9% Maximum Duty Cycle
  • 20:1 Analog or Duty Cycle LED Current Control
  • Open/Short LED Protection and Fault Indication
  • Accurate LED Current Sense with Monitor Output
  • Programmable UVLO Thermally Enhanced 28-Lead (4mm × 5mm) LQFN

Typical applications

  • Automotive Lighting, Industrial and General Purpose Lighting

Products

Order Code Data­sheet Simu­lation Downloads Status Product seriesL
(µH)
IRP,40K
(A)
ISAT,10%
(A)
ISAT,30%
(A)
RDC max.
(mΩ)
fres
(MHz)
MountIR,40K
(A)
SizeVersion Samples
7443630420SPEC
8 files Active i| Production is active. Expected lifetime: >10 years.WE-HCF SMT High Current Inductor 4.2 27 34 38 3.34 24 SMT 2013 SMT
74437336100SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

8 files Active i| Production is active. Expected lifetime: >10 years.WE-LHMI SMT Power Inductor 10 2.9 2.8 5.35 128 16 SMT 2.4 5030
7447709151SPEC
9 files Active i| Production is active. Expected lifetime: >10 years.WE-PD SMT Power Inductor 150 2.6 2.7 3.3 200 3.5 SMT 2.1 1210 Standard
Order Code Data­sheet Simu­lation
7443630420SPEC
74437336100SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7447709151SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Status Product seriesL
(µH)
IRP,40K
(A)
ISAT,10%
(A)
ISAT,30%
(A)
RDC max.
(mΩ)
fres
(MHz)
MountIR,40K
(A)
SizeVersion Samples