High voltage half bridge driver with oscillator
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
dV/dt immunity up to ±50 V/ns
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
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.)