IR2151SPBF datasheet by International Rectifier

IR2151SPBF Frequently Asked Questions (FAQs)

• What is the maximum voltage that can be applied to the VCC pin?
  The maximum voltage that can be applied to the VCC pin is 20V, but it's recommended to keep it below 18V for reliable operation.
• How do I calculate the minimum bootstrap capacitor value?
  The minimum bootstrap capacitor value can be calculated using the formula: CBOOT ≥ (VCC / 2) * (tON / (RBOOT * VBOOT)), where tON is the on-time of the high-side switch, RBOOT is the bootstrap resistor, and VBOOT is the bootstrap voltage.
• What is the purpose of the SD pin, and how do I use it?
  The SD (Shutdown) pin is used to disable the IC and reduce power consumption. To use it, connect the SD pin to a logic low signal (typically 0V) to shut down the IC, and connect it to a logic high signal (typically VCC) to enable the IC.
• How do I choose the right bootstrap diode for my application?
  Choose a bootstrap diode with a reverse recovery time (trr) less than 100ns, and a voltage rating higher than the maximum voltage applied to the high-side switch. A 1N4148 or similar diode is a good choice for most applications.
• What is the maximum frequency of operation for the IR2151SPBF?
  The maximum frequency of operation for the IR2151SPBF is 500kHz, but it's recommended to operate at a frequency below 400kHz for reliable operation and to minimize EMI.