IR2156PBF datasheet by International Rectifier

IR2156PBF 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 calculate the minimum bootstrap capacitor value?
  The minimum bootstrap capacitor value can be calculated using the formula: Cboot = (Ipeak x t_on) / (Vboot - VCC), where Ipeak is the peak current, t_on is the on-time, Vboot is the bootstrap voltage, and VCC is the VCC supply voltage.
• What is the purpose of the SD pin?
  The SD (Shutdown) pin is used to disable the IC and reduce the quiescent current to near zero. When the SD pin is pulled low, the IC enters a low-power shutdown mode.
• How do I ensure proper dead-time between the high-side and low-side switches?
  Proper dead-time can be ensured by setting the dead-time (td) to be at least 100ns to 200ns, and by using a dead-time control circuit or a dedicated dead-time generator IC.
• What is the recommended layout and routing for the IR2156PBF?
  The recommended layout and routing for the IR2156PBF involves keeping the high-current paths short and wide, using a solid ground plane, and separating the high-side and low-side circuits to minimize noise and EMI.