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L6567

January 2000

This is preliminary information on a new product now in development. Details are subject to change without notice.

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BCD-OFF LINE TECHNOLOGY

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FLOATING SUPPLY VOLTAGE UP TO 570V

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GND REFERRED SUPPLY VOLTAGE UP TO

18V

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UNDER VOLTAGE LOCK OUT

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CLAMPING ON Vs

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DRIVER CURRENT CAPABILITY:

30mA SOURCE

70mA SINK

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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:

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.

SO14

DIP14

ORDERING NUMBERS:

L6567D

L6567

HIGH VOLTAGE DRIVER FOR CFL

BLOCK DIAGRAM

L

FEED FORWARD

VCO +

FREQ. SHIFTING

VOLTAGE

REFERENCE

BIAS

CURRENT

GENERATOR

C

S

C

f

C

i

CI

CF

V

S

to

comp.

14

12

5

13

PREHEATING

TIMING

LOGIC

RHV

Rhv

Vhv

Cp/Cav

C

10

11

8

CP

LEVEL

SHIFTING

HIGH

SIDE

DRIVER

F

S

G1

S1

1

2

3

LOW

SIDE

DRIVER

T1

6

7

9

Vhv

Chv

Chv

MAINS

T2

Rshunt

G2

PGND

Ref

D96IN441B

Lamp

CL

SGND

MULTIPOWER BCD TECHNOLOGY