IR2111SPBF datasheet by International Rectifier

IR2111SPBF 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 maximum voltage on the VCC pin 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 an active-low input that allows the user to shut down the IC when pulled low. When the SD pin is pulled low, the IC enters a low-power state, and all outputs are turned off. This pin can be used to implement undervoltage lockout or to shut down the IC during fault conditions.
• How do I handle the dead time between the high-side and low-side drivers?
  The IR2111SPBF 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. The dead time can be calculated using the formula: Dead Time (ns) = 540 + (RDT x CDT), where RDT is the external resistor value and CDT is the external capacitor value.
• What is the maximum frequency of operation for the IR2111SPBF?
  The maximum frequency of operation for the IR2111SPBF is 500kHz, but it's recommended to operate at frequencies below 200kHz for optimal performance and to minimize power losses.