深圳市中立信电子科技有限公司

L6571A

High voltage half bridge driver with oscillator 门驱动器 Hi-Volt Half Bridge

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 crossconduction

of the power devices.

Two version are available: L6571A and L6571B.

They differ in the internal dead time: 1.25μs and

0.72 μs (typ.)

The frequency of the internal oscillator can be programmed using external resistor and

capacitor.

■ 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