IR2104 datasheet by International Rectifier

IR2104 Frequently Asked Questions (FAQs)

• What is the maximum voltage rating of the bootstrap capacitor?
  The maximum voltage rating of the bootstrap capacitor should be at least 2x the maximum voltage of the VCC supply, typically 15V to 20V.
• How do I ensure proper bootstrap capacitor selection?
  Select a bootstrap capacitor with a low ESR, high ripple current rating, and a voltage rating as mentioned above. A 1uF to 10uF ceramic capacitor is a good starting point.
• What is the purpose of the SD pin?
  The SD (Shutdown) pin is used to disable the IC and reduce power consumption. When SD is pulled low, the IC enters a low-power shutdown mode.
• How do I handle the dead time between the high-side and low-side switches?
  The IR2104 has a built-in dead time generator that ensures a minimum dead time of 100ns between the high-side and low-side switches. This can be adjusted using external resistors and capacitors.
• What is the maximum switching frequency of the IR2104?
  The maximum switching frequency of the IR2104 is typically up to 500kHz, but it can be limited by the application's requirements and the external component selection.