IR2111 datasheet by International Rectifier

IR2111 Frequently Asked Questions (FAQs)

• What is the maximum voltage that can be applied to the VCC pin?
  The maximum voltage that can be applied to the VCC pin is 15V, but it's recommended to keep it between 10V to 14V for optimal performance.
• How do I ensure proper bootstrap capacitor selection?
  The bootstrap capacitor should be selected based on the maximum voltage and current requirements of the high-side driver. A general rule of thumb is to choose a capacitor with a voltage rating of at least 2x the VCC voltage and a capacitance value of 10nF to 100nF.
• What is the purpose of the SD pin, and how do I use it?
  The SD (Shutdown) pin is used to disable the IR2111 driver. When the SD pin is pulled low, the driver is shut down, and the output pins are in a high-impedance state. This can be useful for reducing power consumption in standby modes or during fault conditions.
• How do I handle the dead time between the high-side and low-side drivers?
  The IR2111 has a built-in dead time generator that ensures a minimum dead time of 540ns between the high-side and low-side drivers. However, the user can adjust the dead time by adding an external resistor and capacitor between the DT (Dead Time) pin and ground.
• What is the maximum frequency of operation for the IR2111?
  The maximum frequency of operation for the IR2111 is typically limited by the switching losses and the ability to maintain a stable bootstrap voltage. In general, the IR2111 can operate up to 500kHz, but it's recommended to consult the datasheet and application notes for specific frequency limitations.