IR21531SPBF datasheet by International Rectifier

IR21531SPBF Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the IR21531SPBF?
  The maximum operating frequency of the IR21531SPBF is 500 kHz, but it can be operated up to 1 MHz with reduced performance.
• How do I ensure the bootstrap capacitor is properly charged?
  To ensure the bootstrap capacitor is properly charged, make sure the VCC pin is powered up before the input signal is applied, and the bootstrap capacitor should be at least 10 times the input capacitance.
• What is the recommended value for the bootstrap capacitor?
  The recommended value for the bootstrap capacitor is 1nF to 10nF, but the optimal value depends on the specific application and operating frequency.
• How do I handle the dead time between the high-side and low-side switches?
  The dead time between the high-side and low-side switches should be set to ensure that both switches are not on at the same time, which can cause shoot-through current. A dead time of 100-200 ns is typically recommended.
• What is the maximum allowable voltage on the HO pin?
  The maximum allowable voltage on the HO pin is 15V, but it's recommended to keep it below 12V to ensure reliable operation.