欢迎访问ic37.com |
会员登录 免费注册
发布采购

L6574 参数 Datasheet PDF下载

L6574图片预览
型号: L6574
PDF下载: 下载PDF文件 查看货源
内容描述: CFL / TL镇流器驱动器预热和调光 [CFL/TL BALLAST DRIVER PREHEAT AND DIMMING]
分类和应用: 驱动器
文件页数/大小: 10 页 / 164 K
品牌: STMICROELECTRONICS [ STMICROELECTRONICS ]
 浏览型号L6574的Datasheet PDF文件第2页浏览型号L6574的Datasheet PDF文件第3页浏览型号L6574的Datasheet PDF文件第4页浏览型号L6574的Datasheet PDF文件第5页浏览型号L6574的Datasheet PDF文件第6页浏览型号L6574的Datasheet PDF文件第7页浏览型号L6574的Datasheet PDF文件第8页浏览型号L6574的Datasheet PDF文件第9页  
L6574
CFL/TL BALLAST DRIVER PREHEAT AND DIMMING
s
s
s
s
s
s
s
s
s
s
s
s
s
HIGH VOLTAGE RAIL UP TO 600V
dV/dt IMMUNITY ± 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
SO16N
DIP16
ORDERING NUMBERS:
L6574D
L6574
The device is intended to drive two power MOS-
FETS, in the classical half bridge topology, ensur-
ing 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 pre-
heat 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 nor-
mally required bootstrap diode and the zener clamp-
ing on Vs, makes the L6574 well suited for low cost
applications where few additional components are
needed to build a high performance ballast.
DESCRIPTION
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.
BLOCK DIAGRAM
H.V.
V
S
OP AMP
OPOUT
OPIN-
OPIN+
OUT
Imin
V
REF
DEAD
TIME
Ifs
Imax
V
REF
+
-
R
PRE
CONTROL
LOGIC
Vthpre
+
-
V
THE
EN2
V
THE
EN1
Ipre
DRIVING
LOGIC
LEVEL
SHIFTER
V
S
LVG
R
ING
LVG DRIVER
GND
V
BOOT
+
-
UV
DETECTION
BOOTSTRAP
DRIVER
HVG
DRIVER
HVG
C
BOOT
LOAD
+
-
+
-
VCO
Cf
C
PRE
D97IN493A
September 2003
1/10