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LIGHTING IC DESIGN PORTFOLIO


Induction Lamp Driver

High voltage induction lamp prototype board

A dimmable induction lamp driver IC was developed. It is a mixed signal design with a digital front-end driving an analog circuit that fires and controls the induction lamp plasma. Line-voltage drivers were combined with low-voltage digital logic on one die.

The drive circuitry monitors and changes the magnetic drive in real time based on the varying, negative impedance load.

Mixed Signal Breadboard Development

  • An FPGA development platform was used to create the digital waveforms and dim profile
  • The FPGA drove a high voltage analog card that fires the lamp
  • A custom analog board was made to provided flicker-free dimming function with the actual induction bulb prior to integration into an IC

CFL Ballast

Lambda CFL board
A dimmable CFL ballast IC was developed. It is a mixed signal design with a digital front-end driving an analog circuit that fires a compact fluorescent lamp (CFL). Dimming levels down to 5% without reducing lamp lifetime was achieved.
Lambda CFL Driver - Mixed Signal ASIC (iSine product)
  • Prior to release to Silicon, a development platform consisting of an FPGA board driving an analog board ‘prototyped’ the lamp drive.
  • Using the prototype board, many revisions were made to adjust the circuit to work well with a variety of CFL bulbs.
  • A complex feedback and control function was completed using synthesized, phase aligned active current control, and pulse burst envelope shaping
  • The final design was implemented in a mixed-signal IC