L6574 CFL/TL Ballast Driver with Preheat and Dimming

In order to ensure voltage ratings in excess of 600V, the L6574 is manufactured with BCD OFF LINE technology, which makes it well suited for lamp ballast applications.

The device is intended to drive two power MOSFETS, in the classical half bridge topology, ensuring all the features needed to drive and properly control a fluorescent bulb.

A dedicated timing section in the L6574 allows the user set the necessary parameters for proper preheat and ignition of the lamp.

Also, an OP AMP is available to implement closed loop control of the lamp current during normal lamp burning.

An integrated bootstrap section, eliminating the normally required bootstrap diode and the zener clamping on Vs, makes the L6574 well suited for low cost applications where few additional components are needed to build a high performance ballast.

技术特性

HIGH VOLTAGE RAIL UP TO 600V
dV/dt IMMUNITY O± 50 V/ns IN FULL TEMPERATURE RANGE
DRIVER CURRENT CAPABILITY:
- 250mA SOURCE
- 450mA SINK
SWITCHING TIMES 80/40ns RISE/FALL
WITH 1nF LOAD
CMOS SHUT DOWN INPUT
UNDER VOLTAGE LOCK OUT
PREHEAT AND FREQUENCY SHIFTING TIMING
SENSE OP AMP FOR CLOSED LOOP CONTROL OR PROTECTION FEATURES
HIGH ACCURACY CURRENT CONTROLLED OSCILLATOR
INTEGRATED BOOTSTRAP DIODE
CLAMPING ON VS.
SO16, DIP 16 PACKAGES

功能框图

L6574 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
L6574D013TR	Active			SO-16	Tape And Reel		L6574D013TR
L6574	Active			PDIP 16	Tube		L6574
L6574D	Active			SO-16	Tube		L6574D

DATASHEET

描述	版本	大小
L6574 : DS1301: CFL/TL ballast driver preheat and dimming	11	164KB

APPLICATION NOTES

描述	版本	大小
AN1320: L6574 & microcontroller in ballast applications	1	159KB
AN993: Electronic ballast with PFC using L6574 and L6561	10	1407KB
AN2654: CCFL backlight half-bridge topology based on L6574 and STD7NS20	1	795KB
AN2708: 2X36 W digital dimmable ballast with L6574 and ST7FDALI	1	1458KB
AN2590: 20 W dimmable CFL ballast solution	1	838KB