IR2233J datasheet by International Rectifier

IR2233J 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 pin, which is typically 15V. A 25V or 30V rated capacitor is recommended.
• How do I calculate the minimum bootstrap capacitor value?
  The minimum bootstrap capacitor value can be calculated using the formula: CBOOT >= (QG / (VCC - VBOOT)) * (1 / fSW), where QG is the gate charge of the MOSFET, VCC is the supply voltage, VBOOT is the bootstrap voltage, and fSW is the switching frequency.
• What is the purpose of the VCC bypass capacitor?
  The VCC bypass capacitor is used to filter out high-frequency noise and ripple on the VCC pin, ensuring that the IC operates reliably and preventing false triggering of the IC.
• Can I use the IR2233J with a MOSFET that has a different gate charge?
  Yes, but you may need to adjust the bootstrap capacitor value and the gate resistor value to ensure proper operation. The IR2233J is designed to work with MOSFETs with a gate charge of around 20-50nC, so if your MOSFET has a significantly different gate charge, you may need to adjust the circuit accordingly.
• What is the maximum switching frequency of the IR2233J?
  The maximum switching frequency of the IR2233J is typically around 500kHz, but it can be operated at higher frequencies with proper design and layout considerations. However, increasing the switching frequency may reduce the efficiency and increase the losses in the circuit.