MIC3203 LED Driver Controllers

Micrel's MIC3203 provides an ideal solution for interior and exterior lighting

Image of Micrel's MIC3203 LED Driver ControllersMicrel's MIC3203 is a hysteretic, step-down, constant-current, high-brightness LED driver. It provides an ideal solution for interior and exterior lighting, architectural, and ambient lighting, LED bulbs, and other general illumination applications. The MIC3203 is well suited for lighting applications requiring a wide-input voltage range. The hysteretic control gives good supply rejection and fast response during load transients and PWM dimming. The high-side current sensing and on-chip current-sense amplifier delivers LED current with ±5% accuracy. An external high-side current-sense resistor is used to set the output current.

The MIC3203 offers a dedicated PWM input (DIM) that enables a wide range of pulsed dimming. A high-frequency switching operation up to 1.5 MHz allows the use of smaller external components, minimizing space and cost. The MIC3203 offers a frequency dither feature for EMI control. The MIC3203 operates over a junction temperature from -40°C to 125°C.

Features
  • 4.5 V to 42 V input voltage range
  • High efficiency (>90%)
  • ±5% LED current accuracy
  • High-side current sense
  • Dedicated dimming control input
  • Up to 1.5 MHz switching frequency
  • Adjustable constant LED current
  • Overtemperature protection
  • -40°C to 125°C junction temperature range

MIC3203

ImageManufacturer Part NumberDescriptionAvailable Quantity
MIC3203YM datasheet linkIC LED DRIVER CTRLR DIM 8SOICMIC3203YMIC LED DRIVER CTRLR DIM 8SOIC3685 - Immediate
MIC3203YM product page link
MIC3203-1YM datasheet linkIC LED DRIVER CTRLR DIM 8SOICMIC3203-1YMIC LED DRIVER CTRLR DIM 8SOIC0MIC3203-1YM product page link
Published: 2010-07-07