IR2101STR datasheet by International Rectifier

IR2101STR 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 that meets the requirement mentioned above. A 1uF to 10uF ceramic capacitor is a good starting point.
• What is the purpose of the SD pin, and how do I use it?
  The SD (Shutdown) pin is an active-low input that disables the IC when pulled low. It can be used to implement a shutdown or standby mode in the system. Connect it to a logic signal or a pull-up resistor to VCC if not used.
• How do I handle the dead time between the high-side and low-side switches?
  The IR2101STR has a built-in dead time of 100ns to 200ns. Ensure that the dead time is sufficient for your application by considering the switching frequency, voltage, and inductance. You can also adjust the dead time by adding external resistors and capacitors.
• What is the recommended layout and thermal management for the IR2101STR?
  Follow a good PCB layout practice with a solid ground plane, short traces, and a heat sink for the IC. Ensure good thermal conductivity between the IC and the heat sink. Keep the IC away from high-voltage nodes and sensitive analog circuits.