LT3922

PRODUCTION

36V, 2A Synchronous Step-Up LED Driver

Data Sheet (Rev. B) Product Selection Table
Part Models
6
1ku List Price
Starting From $3.26
Viewing:

Part Details

  • ±2.5% 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
  • Operates in Boost, Buck Mode and Buck-Boost Mode
  • 2.8V to 36V Input Voltage Range
  • Up to 34V LED String Voltage
  • 2A, 40V Internal Switches
  • 200kHz to 2MHz with SYNC Function
  • Analog or Duty Cycle LED Current Control
  • Open/Short LED Protection and Fault Indication
  • Thermally Enhanced 28-Pin (4mm × 5mm) QFN
LT3922
36V, 2A Synchronous Step-Up LED Driver
LT3922 Application Circuit LT3922 Performance Graph LT3922 Pin Configuration
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project
Ask a Question

Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Design Note 1

Technical Articles 2

Learn More
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project

Hardware Ecosystem

Parts Product Life Cycle Description
High Voltage Hot Swap Controllers 1
LTC4380
RECOMMENDED FOR NEW DESIGNS Low Quiescent Current Surge Stopper
PowerPath, Ideal Diodes, and Load Switches 1
LTC4359
RECOMMENDED FOR NEW DESIGNS Ideal Diode Controller with Reverse Input Protection
Modal heading
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project

Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LT3922
  • LT3922-1
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
schematic 5
DC2247A

LT3922 Demo Board | Synchronous Boost LED Driver, 4V ≤ VIN ≤ 28V, VLED = 34V @ Up to 330mA, 2MHz fSWITCH

Buy Now View Details

Product Details

Demonstration circuit DC2247A is a synchronous 2MHz boost LED driver featuring the LT®3922. The LT3922 features a low EMI Silent Switcher architecture and an optional spread spectrum frequency modulation (SSFM) that further reduces EMI. It has a 2A/36V internal power switch, but the demo board has been configured to use a 4V to 28V input and thus has input overvoltage lockout set at 28V. It drives a single string of LEDs at 330mA up to 34V when the input voltage is between 7V and 28V.


DC2247A comes with low EMI features including optimized layout, SSFM, and input and output filters. It passes CISPR 25 class 5 conducted and radiated EMI. The LT3922 is protected against both open and short LED conditions and reports these faults. It also includes thermal shutdown. 
DC2247A
LT3922 Demo Board | Synchronous Boost LED Driver, 4V ≤ VIN ≤ 28V, VLED = 34V @ Up to 330mA, 2MHz fSWITCH
DC2247A Demo Board DC2247A Demo Board DC2247A Demo Board DC2247A Demo Board DC2247A_UG-1317 Image

Latest Discussions

4 Years Ago
RE: LT3922 Buck Mode Schematic
4 Years Ago
RE: LT3922
View related discussion on EngineerZone®

Recently Viewed