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L6567D Datasheet

  • L6567D

  • HIGH VOLTAGE DRIVER FOR CFL

  • 15頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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L6567
HIGH VOLTAGE DRIVER FOR CFL
n
n
n
BCD-OFF LINE TECHNOLOGY
FLOATING SUPPLY VOLTAGE UP TO 570V
GND REFERRED SUPPLY VOLTAGE UP TO
18V
UNDER VOLTAGE LOCK OUT
CLAMPING ON Vs
DRIVER CURRENT CAPABILITY:
30mA SOURCE
70mA SINK
PREHEAT AND FREQUENCY SHIFT TIMING
MULTIPOWER BCD TECHNOLOGY
n
n
n
SO14
DIP14
n
ORDERING NUMBERS:
L6567D
L6567
DESCRIPTION
The device is a monolithic high voltage integrated cir-
cuit designed to drive CFL and small TL lamps with a
minimum part count.
It provides all the necessary functions for proper pre-
heat, ignition and steady state operation of the lamp:
鈾?/div>
variable frequency oscillator;
鈾?/div>
settable preheating and ignition time;
鈾?/div>
capacitive mode protection;
鈾?/div>
lamp power independent from mains voltage variation.
Besides the control functions, the IC provides the lev-
el shift and drive function for two external power MOS
FETs in a half-bridge topology.
BLOCK DIAGRAM
Vhv
Rhv
RHV
13
V
S
5
Cp/Cav
CP
8
1
F
S
Vhv
V
S
HIGH
SIDE
DRIVER
FEED FORWARD
PREHEATING
TIMING
LEVEL
SHIFTING
2
G1
Cboot
T1
L
Chv
Lamp
CF
12
VCO +
FREQ. SHIFTING
LOGIC
VOLTAGE
REFERENCE
BIAS
CURRENT
GENERATOR
to
comp.
10
Ref
R
REF
C
LOW
SIDE
DRIVER
3
S1
CI
C
S
C
f
C
i
14
6
G2
T2
CL
MAINS
Chv
7
11
PGND
SGND
Rshunt
9
R
S
D96IN441B
January 2000
This is preliminary information on a new product now in development. Details are subject to change without notice.
1/15

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