The maximum operating frequency of the IR4428SPBF is typically around 500 kHz, but it can be operated up to 1 MHz with proper design and layout considerations.
Proper thermal management of the IR4428SPBF can be achieved by providing a heat sink with a thermal resistance of less than 10°C/W, and ensuring good airflow around the device. Additionally, the PCB layout should be designed to minimize thermal resistance and ensure good heat dissipation.
The recommended dead time for the IR4428SPBF is typically around 100-200 ns, but it can vary depending on the specific application and operating conditions. A longer dead time can help prevent shoot-through currents, but it may also reduce the overall efficiency of the converter.
Yes, the IR4428SPBF can be used in a synchronous buck converter. In fact, it is designed specifically for this type of application. The device's low threshold voltage and fast switching times make it well-suited for high-frequency synchronous buck converters.
The IR4428SPBF has built-in overvoltage protection (OVP) and undervoltage lockout (UVLO) features. However, additional protection circuits may be necessary to ensure the device is protected from extreme voltage conditions. A voltage supervisor or a dedicated overvoltage protection IC can be used to provide additional protection.
IR4428SPBF datasheet
by International Rectifier
