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L6571A

L6571B

September 2000

s

HIGH VOLTAGE RAIL UP TO 600V

s

BCD OFF LINE TECHNOLOGY

s

s

DRIVER CURRENT CAPABILITY:

- SINK CURRENT = 270mA

- SOURCE CURRENT = 170mA

s

VERY LOW START UP CURRENT: 150

µA

s

UNDER VOLTAGE LOCKOUT WITH

HYSTERESIS

s

PROGRAMMABLE OSCILLATOR

FREQUENCY

s

DEAD TIME 1.25

µs (L6571A) or 0.72µs

(L6571B)

s

dV/dt IMMUNITY UP TO ±50V/ns

s

ESD PROTECTION

DESCRIPTION

The device is a high voltage half bridge driver with

built in oscillator. The frequency of the oscillator can

be programmed using external resistor and capaci-

tor. The internal circuitry of the device allows it to be

driven also by external logic signal.

The output drivers are designed to drive external n-

channel power MOSFET and IGBT. The internal log-

ic assures a dead time to avoid cross-conduction of

the power devices.

Two version are available: L6571A and L6571B.

They differ in the internal dead time: 1.25

µs and

0.72

µs(typ.)

Minidip

SO8

ORDERING NUMBERS:

L6571A

L6571AD

L6571B

L6571BD

HIGH VOLTAGE HALF BRIDGE

DRIVER WITH OSCILLATOR

BLOCK DIAGRAM

LOGIC

BIAS

REGULATOR

COMP

COMP

LEVEL

SHIFTER

BUFFER

GND

HIGH

SIDE

DRIVER

LOW SIDE

DRIVER

HVG

LVG

OUT

BOOT

H.V.

LOAD

D96IN433

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