The Atmel® ATtiny24A-based dimmable MR16 LED driver module allows you to develop MR16 or equivalent lamps. The kit comes with a power supply module and an LED board. The circuit is a two-stage switched-mode power supply consisting of a boost converter followed by a constant-current buck converter. Both of these topologies are implemented digitally in a single ATtiny24A microcontroller. The circuit operates with leading- or trailing-edge dimmers. Input can be 12VDC or 12VAC from an electronic or magnetic transformer. The design is flexible and scalable and works with different LED configurations. Firmware used to pre-program the ATtiny24A is available through local Atmel sales offices.


  • Dimmable MR16 lamps
  • LED lamps using 12VDC or 12VAC input
  • LED lamps with 12V electronic transformers
  • Battery-powered lamps

Principais recursos

  • Excellent compatibility with available dimmers and electronic transformer combinations
  • Flicker-free operation with a wide dimming range
  • Programmable solution to suit a wide range of designs
  • Dual-stage topology results in excellent regulation of LED current
  • Pre-programmed operation with 50Hz, 60Hz or DC sources
  • Open lamp protection LED short-circuit protection
  • Over-current protection (OCP)
  • Over-voltage protection (OVP)
  • Components fit in an ANSI form-factor
  • 125°C operation ATtiny24A available in SO-14 package for prototype and QFN-16 4x4 mm package for production