This document describes the highly integrated ballast controller L6520 and L6521, which features a half bridge circuit capable of driving both BJT and MOSFET transistors, a very accurate oscillator with precision in a wide operating temperature range, BJT's storage time compensation, preheated start and instant start, hard switching protection, overcurrent/voltage protection, choke saturation control, and end-of-life protection. It is suitable for electronic ballasts and integrated CFLs applications.
The L6520 and L6521 are highly integrated ballast controllers capable of driving both Bipolar Junction Transistors (BJTs) and MOSFETs. They are designed for use in electronic ballasts for fluorescent tubes (TL) and compact fluorescent lamps (CFL), offering features such as preheated and instant start modes, hard switching protection, and choke saturation control. The devices are fully programmable using only resistors and include sophisticated current control circuits for overcurrent and voltage protection.
| Supply voltage operating range | 10.5 V to 16.5 V |
|---|---|
| Output duty cycle (Run mode) | 50 % |
The IC is able to drive both BJTs and MOSFET transistors.
The IC is fully programmable using only resistors.