L6571A

L6571B

HIGH VOLTAGE HALF BRIDGE

DRIVER WITH OSCILLATOR

TECHNOLOGY: BCD ”OFF-LINE”

FLOATING SUPPLY VOLTAGE UP TO 600V

GND REFERRED SUPPLY VOLTAGE UP TO

18V

DRIVER CURRENT CAPABILITY:

- SINK CURRENT = 270mA

- SOURCE CURRENT = 170mA

VERY LOW START UP CURRENT: 150

µA

VERY LOW OPERATING CURRENT: <2mA

UNDERVOLTAGE LOCKOUT

PROGRAMMABLE OSCILLATOR

FREQUENCY

dV/dt IMMUNITY UP TO

± 50V/ns

DESCRIPTION

The device is a high voltage half bridge driver

with built-in oscillator. The frequency of the oscil-

lator can be programmed using external resistor

and capacitor.

The output drivers are designed to drive external

n-channel power MOSFET and IGBT. The inter-

nal logic assures a minimum dead time to avoid

cross-conduction of the power devices.

June 2000

®

LOGIC

BIAS

REGULATOR

COMP

COMP

LEVEL

SHIFTER

BUFFER

GND

HIGH

SIDE

DRIVER

LOW SIDE

DRIVER

HVG

LVG

OUT

BOOT

H.V.

LOAD

D96IN433

BLOCK DIAGRAM

ORDERING NUMBERS:

L6571A

L6571AD

L6571B

L6571BD

Minidip

SO8

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