The IRS21571DS is a self-oscillating half-bridge driver IC manufactured by International Rectifier (now Infineon Technologies). It is designed to drive MOSFETs and IGBTs in half-bridge configurations, commonly used in electronic ballast for lighting, power supplies, and other resonant converter applications. The IC integrates various protection features and simplifies the design of resonant converters.

Applications

• Electronic ballasts: Drives fluorescent lamps with high efficiency.
• Power supplies: Used in resonant converters for providing regulated DC voltage.
• Induction heating: Drives the resonant circuit in induction heating systems.
• Ultrasonic transducers: Provides the driving signal for ultrasonic cleaning and welding equipment.
• Resonant converters: Used in various resonant power conversion topologies.

Features

• Self-oscillating half-bridge driver: Generates the switching signals for the half-bridge configuration.
• Integrated high-side gate driver: Drives the high-side MOSFET or IGBT.
• Programmable preheat and run frequency: Allows optimization for different lamp or load characteristics.
• Overcurrent protection: Protects the circuit from excessive current flow.
• Overvoltage protection: Prevents damage from excessive voltage levels.
• Shutdown function: Enables disabling the driver for fault conditions or standby mode.
• DIP-8 and SOIC-8 packages: Offers flexibility in mounting options.

Benefits

• Simplified design: Reduces component count and simplifies the design process.
• High efficiency: Enables efficient power conversion.
• Protection features: Enhances the reliability and safety of the circuit.
• Adjustable operating parameters: Allows optimization for different applications.
• Compact size: Enables small form factor designs.

Additional Details

The IRS21571DS operates from a supply voltage range of 11.5V to 17V. The programmable preheat and run frequencies allow for optimizing the performance of the electronic ballast or resonant converter. The integrated overcurrent and overvoltage protection features ensure that the circuit is protected from damage due to fault conditions. The shutdown function allows for disabling the driver in the event of a fault or during standby mode. The IC is available in both DIP-8 and SOIC-8 packages, offering flexibility in mounting options. The self-oscillating nature of the driver simplifies the design and reduces the number of external components required, making it an excellent choice for various resonant converter applications.