L6571A/B is a high voltage half bridge driver with on-chip oscillator from ST Microelectronics. The supply voltage can be up to 600V and GND referenced supply voltage can be up to 18V. The current capability is 270mA and 170mA. The startup current is 150µA and the operating current is less than 2mA. It supports undervoltage lockout and programmable oscillator frequency.
The L6571A and L6571B are high‑voltage half‑bridge drivers that include a programmable internal oscillator. They are intended to drive external N‑channel power MOSFETs or IGBTs, providing built‑in dead‑time to prevent cross‑conduction.
Key specifications include a floating supply voltage up to 600 V, a GND‑referenced supply up to 18 V, sink current of 270 mA, source current of 170 mA, and a typical oscillator frequency of 200 kHz. The device also features low startup and operating currents, under‑voltage lockout, and ESD immunity up to 900 V on certain pins.
| Floating Supply Voltage | up to 600 V |
|---|---|
| GND‑referenced Supply Voltage | up to 18 V |
| Sink Current | 270 mA |
| Source Current | 170 mA |
| Oscillation Frequency | 200 kHz |
| Supply Voltage (Vs) | 10 V to 18 V |
The device can operate with a floating supply voltage up to 600 V.
The internal oscillator is typically set to 200 kHz.
The driver can sink up to 270 mA and source up to 170 mA.