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NCL30105: LED Driver, Flexible Dimmable Buck Controller

Datasheet: Constant Off Time PWM Current-Mode Controller for LED Applications
Rev. 2 (617.0kB)
Product Overview
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The NCL30105 is a peak current controlled fixed off time buck controller designed for LED driver applications. It is optimized to operate in deep continuous conduction mode eliminating the need for output electrolytic capacitors. Featuring an adjustable off time generator, the controller can drive a MOSFET up to a switching frequency of 500 kHz. A dedicated dimming pin enables the use of a pulsewidth modulated logic signal to dim the LED directly. The soft-start pin creates a startup sequence that slowly ramps up the peak current and enables the adjustment of the peak current set point for analog dimming control. The device features robust protection features to detect switch overcurrent faults and to detect maximum on time events.
Features   Benefits
     
  • Constant off time current mode control
 
  • No loop compensation required
  • Adjustable off time (0.5 to 10 µs)
 
  • Easily adjust operating frequency and output ripple
  • Internal leading edge blanking
 
  • Avoids false triggering during FET turn on
  • ± 5% current sense accuracy
 
  • Accurate LED current regulation
  • Internal Startup Delay
 
  • Ensure stable operation during initial system turn on
  • PWM or Analog Dimming Control
 
  • Flexible support for dimmable LED lighting applications
  • Maximum on time protection
 
  • Enhanced system robustness
  • Overcurrent protection
 
  • Enhanced fault handling
  • Thermal Shutdown
 
  • Enhanced protection
  • Soft Start
   
Applications   End Products
  • LED Backlight Driver for large LCD panels
  • LED Lightbar Driver
  • LED Street Lighting
 
  • LED Large Area Lights
  • Architectural Lighting
Evaluation/Development Tool Information
Product Status Compliance Short Description Action
NCL30105G1EVB Active
Pb-free
VCSEL Drv + Buck PWM CTLR
NCL30105GEVB Active
Pb-free
350 mA Buck LED Driver Evaluation Board
Availability & Samples
Specifications
Case Outlines
Application Diagram
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
NCL30105DR2G Active
Pb-free
Halide free
NCL30105 SOIC-8 751-07 1 260 Tape and Reel 2500 $0.2667
Market Leadtime (weeks) : Contact Factory

Product
Description
Pricing ($/Unit)
Compliance
Status
Topology
VI Min (V)
VI Max (V)
VO Max (V)
IO Max (mA)
fSW Typ (kHz)
Package Type
NCL30105DR2G  
 $0.2667 
Pb
H
 Active   
Step-Down
11
22
150
1200
100 - 400
SOIC-8
Case Outlines
751-07   
Packages
NCL30105: LED Driver, Flexible Dimmable Buck Controller
NCL30105: LED Driver, Flexible Dimmable Buck Controller
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Featured Video
LED Lighting Solutions with the NCL30105GEVB Evaluation Board
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