BL9582

 

FEATURES  DESCRIPTION 

     Simple low parts count  The BL9582 is a continuous mode inductive   Internal 32V NDMOS switch  step-down converter, designed f driving   Up to 1.4A output current  single  multiple series connected LEDs   Single pin on/off  brightness control  efficiently from a voltage source higher than 

using DC voltage  PWM  the LED voltage. The device operates from   Soft Start  an input supply between 6V  32V    High efficiency (up to 97％)  provides an externally output current up to   Wide input voltage range: 6V to 32V  1.4A. Depending upon supply voltage    Output shutdown  external components, this can provides up to   Up to 1MHz switching frequency  24 watts of output power.   Inherent open-circuit LED protection  The BL9582 includes the output switch  a   Typical 4％ output current accuracy  high-side output current sensing circuit, which   High-side current sense  uses an external resist to set the nominal   Hysteretic control: no compensation  average output current.   Adjustable constant LED current  Output current can be adjusted by applying   Over temperature protection  an external control signal to the 'ADJ' pin.   Pb-free SOT89-5 packages  The ADJ pin will accept either a DC voltage 

   a PWM wavefm. During DC dimming, 

APPLICATIONS  this will provide a continuous output current 

  that is proptional to the external applied DC   Low voltage halogen replacement LEDs  voltage. During the PWM dimming, this will   Automotive lighting  provide a gated output current  the   Low voltage industrial lighting  average current is proptional to the duty   LED back-up lighting  cycle. Applying a voltage of 0.2V  lower to   Illuminated signs  the ADJ pin turns the output off  switches   LCD TV backlighting  the device into a low current stby state.