L6571 datasheet(1/12 Pages) STMICROELECTRONICS

No de pièce	L6571

Description	High voltage half bridge driver with oscillator

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Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	http://www.st.com

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January 2010

Doc ID 4946 Rev 6

1/12

12

L6571

High voltage half bridge driver with oscillator

Features

■ High voltage rail up to 600 V

■ BCD off line technology

■ 15.6 V Zener clamp on Vs

■ Driver current capability:

– Sink current = 270 mA

– Source current = 170 mA

■ Very low start up current: 150 mA

■ Undervoltage lockout with hysteresis

■ Programmable oscillator frequency

■ Dead time 1.25 μs (L6571A) or 0.72 μs

(L6571B)

■ dV/dt immunity up to ±50 V/ns

■ 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

capacitor.

The internal circuitry of the device allows it to be

driven also by external logic signal.

The output drivers are designed to drive external

nchannel power MOSFET and IGBT. The internal

logic 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.)

DIP-8

SO8

Figure 1.

Block diagram

www.st.com

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