LT3486

PRODUCTION

Dual 1.3A White LED Step-Up Converters with Wide Dimming

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Overview

  • Wide (1000:1) PWM Dimming Range with No ColorShift
  • Independent Dimming and Shutdown Control of the LED Drivers
  • Drives Up to 16 White LEDs at 25mA (8 per Driver) from a Single Li-Ion Cell
  • Drives Up to 16 White LEDs at 100mA (8 per Driver) from 12V Supply
  • ±3% LED Current Programming Accuracy
  • Open LED Protection: 36V Clamp Voltage
  • Fixed Frequency Operation: Up to 2.5MHz
  • Wide Input Voltage Range: 2.5V to 24V
  • Low Shutdown Current: ICC < 1μA
  • Overtemperature Protection
  • Available in (5mm × 3mm × 0.75mm) 16-Pin DFN and 16-Pin Thermally Enhanced TSSOP Packages
LT3486
Dual 1.3A White LED Step-Up Converters with Wide Dimming
Li-Ion Powered Driver for Camera Flash and LCD Backlighting Efficiency vs VIN Product Package 1 Product Package 2
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Documentation

Data Sheet 1

User Guide 1

Technical Articles 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
Circuit Monitors 1
LT2940
PRODUCTION Power and Current Monitor
Digital to Analog Converters (DACs) 1
LTC2635
PRODUCTION Quad 12-/10-/8-Bit I2C VOUT DACs with 10ppm/°C Reference
Pulse-Width Modulation (PWM) & Pulse Generators 1
LTC6992
TimerBlox: Voltage-Controlled Pulse Width Modulator (PWM)
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LT3486
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LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

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schematic 1
DC876A

LT3486EFE Demo Board | Dual Boost LED Driver, 3V ≤ VIN ≤ 25V, VLED up to 36V @ 100mA (×2)

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Product Details

Demonstration circuit 876 is a dual step-up white LED driver with wide dimming range featuring the LT3486. The board is optimized to drive a string of six, eight, or ten white LEDs at 100mA from each of its two outputs with a PVIN input voltage range of 3V to 25V. The maximum LED output voltage must be less than 36V as the overvoltage protection at the output will limit the maximum output voltage to 36V in the case of an open circuit load.


The high input voltage range, high-efficiency low-side internal 1.3A NPN power switches, ground-referenced low-voltage current sense resistors, PWM pins for 1000:1 dimming ratio, control pins for brightness adjust, overvoltage protection, shutdown control pin, externally programmable switching frequency, low shutdown current and internal soft-start capacitor make the LT3486 an extremely powerful and versatile LED driving IC for portable applications and displays.
DC876A
LT3486EFE Demo Board | Dual Boost LED Driver, 3V ≤ VIN ≤ 25V, VLED up to 36V @ 100mA (×2)
DC876A - Schematic

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