IR21091PBF

IR21091PBF belongs to PMIC - Gate Drivers, with an integrated high-side and low-side gate driver. It has excellent driver capability that includes the control of low-side and high-side MOSFETs as well as two high performance integrated gate drive transistors. It is also very easy to use due to its integrated pullup and pulldown resistors, and its low voltage differential signaling input.

The output of the IR21091PBF is designed to provide the necessary current and voltage levels to the gate of power MOSFETs. The high-side driver can deliver up to 1.5A of output current, while the low side can provide up to 3A output current. It has an integrated soft start feature to control the rising edge time of the high side and low side gate drive transistors. It also includes undervoltage protection to protect the gate drive when the input voltage decreases. In addition, it has an overvoltage protection circuit which will reduce the output current and voltage if an overvoltage condition is detected.

The IR21091PBF is designed to work with a wide range of power MOSFETs. It can drive MOSFETs with up to 100V drain-source voltage, up to 5A peak drain current and up to 150W of dissipation power. The IR21091PBF has a supply voltage range of 4.5V to 80V and an operating temperature range of -40 to +150C. It is RoHS and Halogen Free compliant, making it suitable for a variety of applications.

The application field of IR21091PBF includes renewable energy energy inverters, solar power controllers, HVAC, LED Drivers, battery management, automotive and other power electronics circuits. Its main function is to drive the power MOSFETs to ensure increased efficiency, greater power savings, improved fault detection and higher reliability. It also helps eliminate audible noise and reduce switching losses.

The working principle of the IR21091PBF is quite simple. It receives a low voltage differential signaling (LVDS) input which is then amplified by the integrated high-side and low-side gate drive transistors to provide the necessary current and voltage level to the gate of power MOSFETs. It then provides the output to the upper and lower FETS. The pullup and pulldown resistors adjust the switching speed and enhance fault-protection. Undervoltage or overvoltage conditions are detected by the fault protection circuit, which then reduces the output current and voltage in case of such fault.

The IR21091PBF is a highly integrated and efficient gate driver for powering power MOSFETs. It provides excellent driver capability and increased reliability with its integrated soft start, fault protection, and undervoltage protection circuits. It is suitable for a variety of applications like renewable energy inverters, solar power controllers, battery management and automotive systems.