This document introduces a high voltage driver called L6567, which is used for driving CFL and small TL lamps. It features a variable frequency oscillator, settable preheating and ignition time, capacitive mode protection, etc.
The L6567 is a monolithic high‑voltage driver designed to operate compact fluorescent (CFL) and small TL lamps with a minimal part count. It integrates a variable‑frequency oscillator, pre‑heat and ignition timing, and a feed‑forward control loop to keep lamp power independent of mains voltage variations. The device drives two external MOSFETs in a half‑bridge topology and includes capacitive‑mode protection.
Key features include a floating supply voltage up to 570 V, a GND‑referenced supply up to 18 V, driver current capability of 30 mA source and 70 mA sink, and programmable pre‑heat and ignition times via external components. Electrical characteristics, pin functions, and absolute maximum ratings are detailed in the document.
| Floating Supply Voltage | Up to 570 V |
|---|---|
| GND‑referenced Supply Voltage | Up to 18 V |
| Driver Current Capability | 30 mA source, 70 mA sink |
| Maximum Junction Temperature | -40 °C to 150 °C |
The device can operate with a floating supply voltage up to 570 V.
The GND‑referenced supply voltage can be up to 18 V.
The turn‑off threshold (Vs low2) is typically around 9 V.