A good PCB layout for the IRS2110PBF involves keeping the high-frequency switching nodes (e.g., VCC, VBS, and HO) as close to the IC as possible, using a solid ground plane, and minimizing the length of the bootstrap capacitor connection. A 4-layer PCB with a dedicated power plane and a solid ground plane is recommended.
The bootstrap capacitor value depends on the switching frequency, output current, and voltage. A general rule of thumb is to choose a capacitor with a value between 10nF to 100nF. A larger capacitor value can provide a more stable bootstrap voltage, but may increase the IC's turn-on time.
The maximum allowable voltage on the VBS pin is typically around 15V to 16V, depending on the specific application and operating conditions. Exceeding this voltage can damage the IC. It's essential to ensure that the bootstrap voltage is clamped to prevent overvoltage conditions.
The dead time between the high-side and low-side switches is critical to prevent shoot-through currents. A dead time of around 100ns to 200ns is typically recommended. This can be achieved using a dead-time generator circuit or by programming the dead time into the control IC.
The recommended operating frequency range for the IRS2110PBF is typically between 100kHz to 500kHz. Operating at frequencies above 500kHz may reduce the IC's efficiency and increase EMI emissions.
IRS2110PBF datasheet
by International Rectifier
