The L6571 is a high voltage half bridge driver with a built-in oscillator. The frequency of the oscillator can be programmed using an external resistor and capacitor. The internal circuitry allows the device to also be driven by an external logic signal. The output drivers are designed to drive external n-channel power MOSFET and IGBT. The internal logic ensures a dead time to avoid cross-conduction of the power devices. Two versions are available: L6571A and L6571B. They differ in the internal dead time: 1.25μs and 0.72μs (typical).
The L6571A and L6571B are high voltage half bridge drivers with a built-in oscillator, utilizing BCD off-line technology. The device is designed to drive external N-channel power MOSFETs and IGBTs, ensuring a dead time to avoid cross-conduction of the power devices. Two versions are available, differing in internal dead time: 1.25 µs for the L6571A and 0.72 µs for the L6571B.
| Sink current | 270 mA |
|---|---|
| Source current | 170 mA |
| Start up current | 150 mA |
| Dead time (L6571A) | 1.25 µs |
| Dead time (L6571B) | 0.72 µs |
| dV/dt immunity | +50 V/ns |
| ESD protection | 900 V |
| Storage temperature | -40 to 150 °C |
They differ in the internal dead time: 1.25 µs for L6571A and 0.72 µs for L6571B.
The output drivers are designed to drive external N-channel power MOSFET and IGBT.