LED Driver, Flexible Dimmable Buck Controller

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Overview

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.

  • LED Backlight Driver for large LCD panels
  • LED Lightbar Driver
  • LED Street Lighting
  • LED Large Area Lights
  • Architectural Lighting
  • Constant off time current mode control
  • Adjustable off time (0.5 to 10 µs)
  • Internal leading edge blanking
  • ± 5% current sense accuracy
  • Internal Startup Delay
  • Soft Start
  • PWM or Analog Dimming Control
  • Maximum on time protection
  • Overcurrent protection
  • Thermal Shutdown

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NCL30105DR2G

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SOIC-8

1

260

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2500

N

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22

150

1200

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