MIC3223 High Power Boost LED Driver

Micrel's robust LED driver for many lighting applications

Micrel's MIC3223 High Power Boost LED DriverMicrel, Inc.'s MIC3223 is a constant current boost LED driver capable of a driving a series string of high power LEDs. The MIC3223 can be used in general lighting, bulb replacement, garden pathway lighting, and other solid state illumination applications. The MIC3223 is a peak current mode control PWM boost regulator, and the 4.5 V and 20 V operating input voltage range allows multiple applications from 5 V or 12 V bus.

The MIC3223 implements a fixed internal 1 MHz switching frequency to allow for a reduction in the design footprint size. Power consumption has been minimized through the implementation of a 200 mV feedback voltage that provides an accuracy of ±5%. The MIC3223 can be dimmed through the use of a PWM signal and features an enable pin for a low power shutdown state.

The MIC3223 is a very robust LED driver, which offers the following protection features: over voltage protection (OVP), thermal shutdown, switch current limiting, and under voltage lockout (UVLO).The MIC3223 is offered in a low profile exposed pad 16-pin TSSOP package.

Features
  • 4.5 V to 20 V supply voltage
  • 200 mV feedback voltage with an accuracy of ±5%
  • Step-up output voltage (boost) conversion up to 37 V
  • 1 MHz switching frequency
  • 100 mΩ/3.5 A internal power FET switch
  • LEDs can be dimmed using a PWM signal
  • User settable LED current (through external resistor)
  • Available in an exposed pad 16-pin TSSOP package
  • Externally programmable soft-start
  • Protection features that include:
    • Output over-voltage protection (OVP)
    • Under-voltage lockout (UVLO)
    • Over temperature protection
  • Junction temperature range: -40°C to +125°C
Applications
  • Architectural lighting
  • Industrial lighting
  • Signage landscape lighting (garden/pathway)
  • Under cabinet lighting
  • MR-16 bulbs

MIC3223

ImageManufacturer Part NumberDescriptionAvailable Quantity
MIC3223YTSE datasheet linkIC LED DRIVER RGLTR DIM 16TSSOPMIC3223YTSEIC LED DRIVER RGLTR DIM 16TSSOP1740 - Immediate
MIC3223YTSE product page link
Published: 2010-03-23