IR4426PBF

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The IR4426PBF is a self-oscillating gate driver IC. It is used for gate driving of power MOSFETs and IGBTs. It is a highly integrated, cost constrained yet powerful gate driver IC that serves as the interface between a microcontroller, logic IC or dedicated logic IC and the power MOSFETs or IGBTs in a power electronics circuit. It provides all the functions required for the power MOSFETs and IGBTs to operate optimally at all times, by offering a range of supply voltage, input drive voltage, internal current limit circuits and fault protection (under and over current, over temperature, and over voltage protection).

This device integrates a self-oscillating gate driver and a voltage regulator, allowing a single-supply, logic-compatible device to supply both the logic circuits and the MOSFETs or IGBTs, with a single device, minimizing cost and space. It features a wide operating voltage range from 5V to 60V, and can support MOSFETs and IGBTs up to 1000V. The device includes an adjustable current limit and includes over-temperature, under-current and under-voltage protection features, ensuring safe and reliable operation. The IR4426PBF also integrates an open-emitter latch, internally amplified high-voltage output drivers, a circuit that enables fast ramp-up time, an output enable control and a slew rate control.

This gate driver IC allows fast and easy control of the MOSFETs and IGBTs in power electronics applications, such as motor control, inverters, power converters, smart grid, renewable energy, solar, HVAC, electric vehicle charging, lighting, household appliances, and audio power amps. In motor control applications, the gate driver IC provides high efficiency, fast gate driving and high integration, allowing high performance motor control in a low power system.

The IR4426PBF uses a two-stage self-oscillating gate drive. This type of gate drive consists of two stages, the first being the high side drive and the second being the low side drive. The high side drive includes a logic compatible input, a power switch stage and a high voltage driver. The low side drive includes an output stage, a high voltage driver and a logic compatible input. When the logic compatible input is activated, the process of gate drive is initiated by the high side driver charging the gate of the power device. This charge is then transferred to the low side driver, which then releases the gate voltage to start the switching process. During normal operation, when the logic compatible input is deactivated, the power device gate is discharged by both the high side and the low side drivers.

In addition to its general purpose applications, the IR4426PBF also has applications in the field of medical equipment. Its features of high efficiency, built-in protection and high performance, make it well suited for use in medical devices such as defibrillators, infusion pumps, imaging systems, medical monitors and other medical devices.

The IR4426PBF is a versatile, cost-effective gate driver IC, suitable for a wide range of applications. With its range of supply voltage, input drive voltage, internal current limit circuits and fault protections, it offers high performance and reliability, making it an ideal solution for high power applications.

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