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ATAVRFBKIT Ballast Demo Kit » ATAVRFBKIT

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ATAVRFBKIT Ballast Demo Kit - ATAVRFBKIT

The ATAVRFBKIT is a Dimmable Fluorescent Ballast kit which demonstrate the ability of the AT90PWM2 to control all the main functions of a DALI Fluorescent Ballast. C code is provided to speed-up development time.

Fluorescent ballast topology usually includes line conditioning for CE and UL compliance, a power factor correction block including a boost converter to 380 V for universal input applications and a half bridge inverter. By varying the frequency of the inverter, the controller will preheat the filaments (high frequency), then ignite the lamp (reducing the frequency). Once the lamp is lit,varying the frequency will dim the light. AT90PWMx microcontroller can be programmed to perform all these functions.

Ballast Demonstrator Features

  • Automatic microcontroller dimmable ballast
  • Universal input - 90 to 265 VAC 50/60 Hz, 90 to 370 VDC
  • Power Factor Corrected (PFC) boost regulator
  • PFC Operation with: High power factor >0.95, Low harmonic distortion <10%, Low standby power <600mW
  • Power feedback for stable operation over line voltage range
  • Variable frequency half bridge inverter
  • Two lamps, type T8, 18W
  • Automatic dimmable single lamp operation
  • Automatic detection of Swiss, DALI, or 0 - 10V dimming control
  • Very versatile power saving options with microcontroller design for most functions

AT90PWMx Microcontroller

  • High speed comparator for PFC zero crossover detection
  • High speed configurable PWM outputs for PFC and half bridge inverter
  • 6 Analog inputs for A/D conversion, 2.56V reference level
  • 3 Digital inputs used for the dimming control input
  • 3 High speed PWM outputs used for the PFC and half bridge driver
  • A fully differential A/D with programmable gain
  • Low power consumption in standby mode

Silicon

Lighting AVR