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L6598

June 2004

1

FEATURES

■

HIGH VOLTAGE RAIL UP TO 600V

■

dV/dt IMMUNITY

±50V/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

■

SOFT START 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, DIP16 PACKAGES

2

DESCRIPTION

The device is manufactured with the BCD OFF LINE

technology, able to ensure voltage ratings up to

600V, making it perfectly suited for AC/DC Adapters

and wherever a Resonant Topology can be benefi-

cial. The device is intended to drive two Power MOS,

in the classical Half Bridge Topology. A dedicated

Timing Section allows the designer to set Soft Start

Time, Soft Start and Minimum Frequency. An Error

Amplifier, together with the two Enable inputs, are

made available. In addition, the integrated Bootstrap

Diode and the Zener Clamping on low voltage sup-

ply, reduces to a minimum the external parts needed

in the applications.

HIGH VOLTAGE RESONANT CONTROLLER

Figure 2. Block Diagram

GND

Ifmin

Rfmin

VCO

EN1

Vthe1

Vthe2

EN2

OUT

LOAD

H.V.

LVG

UV

DETECTION

Vs

HVG

BOOTSTRAP

DRIVER

HVG

DRIVER

LVG DRIVER

Css

Ifstart

Rfstart

Cf

OP AMP

+

-

OPOUT

OPIN-

OPIN+

DEAD

TIME

DRIVING

LOGIC

CONTROL

LOGIC

Iss

+

-

+

-

LEVEL

SHIFTER

D98IN887A

12

5

6

7

4

2

3

1

9

8

10

11

14

15

16

Figure 1. Packages

Table 1. Order Codes

Part Number

Package

L6598

DIP-16

L6598D

SO-16N

L6598D013TR

Tape & Reel

DIP-16

SO-16N