L6567 Datasheet, PDF (1/15 Pages) STMicroelectronics – HIGH VOLTAGE DRIVER FOR CFL

L6567
HIGH VOLTAGE DRIVER FOR CFL
n BCD-OFF LINE TECHNOLOGY
n FLOATING SUPPLY VOLTAGE UP TO 570V
n GND REFERRED SUPPLY VOLTAGE UP TO
18V
n UNDER VOLTAGE LOCK OUT
n CLAMPING ON Vs
n DRIVER CURRENT CAPABILITY:
30mA SOURCE
70mA SINK
n PREHEAT AND FREQUENCY SHIFT TIMING
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:
♦ variable frequency oscillator;
BLOCK DIAGRAM
MULTIPOWER BCD TECHNOLOGY
SO14
DIP14
ORDERING NUMBERS:
L6567D
L6567
♦ settable preheating and ignition time;
♦ capacitive mode protection;
♦ 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.
V_S 5
CF 12
C_S
C_f
CI 14
C_i
Vhv
Rhv
RHV
13
FEED FORWARD
Cp/Cav
CP
8
V_S
PREHEATING
TIMING
LEVEL
SHIFTING
VCO +
FREQ. SHIFTING
VOLTAGE
REFERENCE
BIAS
CURRENT
GENERATOR
LOGIC
to
C
comp.
10
Ref
R_REF
1 F_S
HIGH
SIDE
DRIVER
2 G1
3 S1
LOW
SIDE
DRIVER
6 G2
7 PGND
11 SGND
9 R_S
Vhv
T1
L
Chv
Lamp
T2
Rshunt
CL
Chv
D96IN441B
MAINS
January 2000
This is preliminary information on a new product now in development. Details are subject to change without notice.
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