ILD1151

Overview

The ILD1151 is a multitopology high power DC-DC controller IC with built in protection features. The main function of this device is to regulate a constant LED current. The constant current regulation is especially beneficial for LED color accuracy and longer lifetime. The controller concept of the ILD1151 allows multiple configurations such as boost, buck, buck-boost, SEPIC and flyback by simply adjusting the external components.

Summary of Features

  • Wide input voltage range from 4.5V to 45V
  • Very Low Shutdown Current: IQ_OFF < 10μA
  • Flexible switching frequency range, 100kHz to 500kHz
  • Synchronization with external clock source
  • PWM dimming
  • Analog dimming feature to adjust average LED current
  • Internal 5V low drop out voltage regulator
  • Open circuit detection
  • Short to GND protection
  • Output overvoltage protection
  • Internal soft start
  • Over temperature shutdown
  • Wide LED current range via simple adaptation of external components
  • 300mV high side current sense to ensure highest flexibility and LED current accuracy
  • Available in a small thermally enhanced SSOP-14 package
  • Green product (RoHS) compliant
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