STMicroelectronics AN3159 Application Note for STEVAL-ILHO05V2 150 W HID Electronic Ballast

About this manual

The document details a two-stage electronic ballast designed for 185+265 Vac input mains. The circuit consists of a boost converter acting as a power factor controller (PFC) operating in transition mode, followed by an inverter stage using a full bridge to drive the lamp at low frequency square waves.

The note provides comprehensive information including general circuit descriptions, lamp power calculation formulas implemented in the ST7 microcontroller, board layout details, and experimental results covering ignition, warm-up, and burn phases.

What's inside

• General circuit description
• Lamp power calculation
• Board description
• PFC Section
• ST7 microcontroller application pins utilization
• Auxiliary power supply
• Lamp data
• Experimental results

Specifications

Frequently asked questions

What is the purpose of this document?

This application note describes a two-stage electronic ballast for 150 W HID metal halide lamps.

What input voltage does the ballast support?

The ballast is designed for an input mains of 185+265 Vac at 50/60 Hz.

Which microcontroller is used in the design?

The design utilizes an ST7 microcontroller.