The L6585DE is a combo IC for electronic ballasts that offers the designer a high performance PFC stage, high capability half bridge high voltage drivers, a fully programmable control and an enhanced set of protections.
The document introduces the L6585DE combo IC, a single-chip solution designed for high-performance electronic ballasts. It combines a transition mode PFC converter with a half-bridge controller and high-voltage drivers to drive fluorescent lamps efficiently while meeting safety and power factor requirements.
The note details the internal architecture of the L6585DE, including its PFC section with THD optimization and over-voltage/over-current protection, and its ballast controller section featuring programmable oscillators, preheating/ignition timing, and end-of-life detection. It also provides guidance on designing the PFC and ballast stages using the device.
| PFC driver source current | 300 mA |
|---|---|
| PFC driver sink current | 600 mA |
| Half-bridge driver source current | 290 mA |
| Half-bridge driver sink current | 480 mA |
| High voltage driver rating | 600 Vdc |
| Package type | SO20 |
The L6585DE embeds both a PFC converter and a ballast regulator in a single chip to design complete high power electronic ballasts.
It uses an internal window comparator that can be configured to detect EOL status based on either lamp-to-ground or block capacitor-to-ground voltage levels.
A frequency greater than 20 kHz is typically used to reduce the size of the ballast and increase the light efficiency of the lamp.