LT3932
LT3932-1

PRODUCTION

36V, 2A Synchronous Step-Down LED Driver

Data Sheet (Rev. C) Product Selection Table
Part Models
18
1ku List Price
Starting From $3.26
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Part Details

  • ±1.5% LED Current Regulation
  • ±1.2% Output Voltage Regulation
  • 5000:1/10000+:1 PWM Dimming at 100Hz (LT3932/LT3932-1)
  • 128:1 Internal PWM Dimming
  • Spread-Spectrum Frequency Modulation
  • Silent Switcher® Architecture for Low EMI
  • 3.6V to 36V Input Voltage Range
  • 0V to 36V LED String Voltage
  • 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-Pin (4mm × 5mm) QFN
  • AEC-Q100 Qualified for Automotive Applications
LT3932
LT3932-1
36V, 2A Synchronous Step-Down LED Driver
LT3932-3932-1 Application Circuit LT3932-3932-1 Performance Graph LT3932-3932-1 Pin Configuration
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Documentation

Data Sheet 1

User Guide 1

Design Note 1

Technical Articles 1

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Hardware Ecosystem

Parts Product Life Cycle Description
High Voltage Hot Swap Controllers 1
LTC4380
RECOMMENDED FOR NEW DESIGNS Low Quiescent Current Surge Stopper
Low Voltage Hot Swap Controllers 1
LTC4231
RECOMMENDED FOR NEW DESIGNS Micropower Hot Swap Controller
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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LT3932
  • LT3932-1
LTspice

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

eval board
schematic 1
schematic 2
schematic 3
schematic 4
DC2286A

LT3932 Demo Board | VIN = 8V to 36V driving two series LEDs (1ALED/6.6VLED) at 2MHz

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Product Details

Demonstration circuit DC2286A is a 36V, 2A synchronous 2MHz buck LED driver featuring the LT3932. It drives one or two series LEDs at 1A when VIN is between 8V and 36V. It can run down to 4VIN with a single LED (if UVLO is adjusted). DC2286A runs at 2MHz switching frequency. Spread spectrum frequency modulation (SSFM) can be turned on with a simple jumper, reducing EMI. DC2286A comes with low EMI features including optimized layout, SSFM, and input and output filters. It passes CISPR 25 class 5 conducted and radiated EMI. It is protected against both open and short LED conditions and reports the faults.
DC2286A
LT3932 Demo Board | VIN = 8V to 36V driving two series LEDs (1ALED/6.6VLED) at 2MHz
DC2286A Evaluation Board DC2286A Evaluation Board - Top View DC2286A Evaluation Board - Bottom View DC2286A

Latest Discussions

2 Years Ago
RE: LT3932 minimum current when use CTRL pin
3 Years Ago
RE: LT3932 LED Driver permanently damages when using Enable/UVLO function and CTRL & PWM inputs are active.
View related discussion on EngineerZone®

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