L6520 Low Voltage Smart Ballast Controller

The L6520/1 is the first highly integrated ballast controller in the market able to drive both BJTs and MOSFETs, providing all the necessary protections to ensure the maximum reliability of the application in compliance with major safety and power consumption regulations.

By adopting BJTs switches in the application, the IC allows to replace more expensive MOSFETs, strongly reducing the system cost without compromises.

The IC represents also the best and cost effective solution to replace self oscillating solutions when the key requirement is the reliability of the ballast. The benefits are an increased MTBF and a reduction of the costs due to the return from the field.

The higher level of flexibility and integration provided allows the possibility to quickly design ballast with any kind of lamp topology/size/power, without limitations. Depending on the power of the lamp, the IC can work without PFC, with passive PFC or with active PFC. In the latter case the L6562A from STMicroelectronics is the suggested IC for the most cost effective solution.

The IC is fully programmable using only resistors and offers over current protections, choke saturation control and hard switching protection thanks to a sophisticated current control circuit (CCC). In ignition, the CCC limits both the maximum lamp voltage in case of old or broken lamp, and also the lamp current in case of inductor saturation.

When the IC is driving bipolar transistors, a variable dead time ensures the correct base discharge time avoiding cross conduction phenomena. Moreover, the IC prevents the failure due to the lamp's end of life (EOL).

技术特性

Half bridge circuit able to drive both BJT and MOSFET transistors
Very accurate oscillator precision in wide operating temperature range
BJTs' storage time compensation
Preheated start and instant start
Hard switching protection
Overcurrent / voltage protection
Choke saturation control
End-of-life protection
Programmable without capacitors

功能框图

L6520 订购信息

订购型号	产品状态	美金价格	数量	封装	包装形式	温度范围	材料声明
L6521	Active			SO-8	Tube		L6521
L6520	Active			SO-8	Tube		L6520
L6521TR	Active			SO-8	Tape And Reel		L6521TR
L6520TR	Active			SO-8	Tape And Reel		L6520TR

DATASHEET

描述	版本	大小
L6520 : DS6681: Highly integrated ballast controller for TL and CFL	3	321KB

FLYERS

描述	版本	大小
L652x: the most reliable solution for fluorescent lamps	1.0.0	809KB