2x58 W/T8 or 2x36 W/T8 fluorescent lamp ballast demonstration board driven by STMicroelectronics' L6585D
This application note describes a demonstration board designed to drive two 58 W linear T8 fluorescent tubes. The board utilizes the STMicroelectronics L6585D controller, which integrates Power Factor Correction (PFC) and half-bridge control circuits. The document details the circuit design, including the half-bridge inverter topology, biasing circuitry, and protection mechanisms.
The note also specifies the modifications required to adapt the same demonstration board for driving two 36 W linear T8 fluorescent tubes. It covers the electrical schematic, design criteria, experimental results, and conduction emissions tests.
| Line frequency | 50/60 Hz |
|---|---|
| Number of lamps | 2 |
| Lamp type | T8 in parallel configuration |
| Lamp power | 58 W or 36 W |
| Power factor | 0.9 |
| Total harmonic distortion | <10% |
| Efficiency | 90% |
The board is designed to drive 2x58 W linear T8 fluorescent tubes, with modifications available for 2x36 W tubes.
The ballast is controlled by the STMicroelectronics L6585D.
The target efficiency for the electronic lamp ballast is 90%.