IR21368SPBF

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The IR21368SPBF belongs to the category of PMIC (Power Management IC), Gated Drivers. It is a low-side gate driver that has been designed to drive large N-channel MOSFETs and IGBTs that up to 950V. It can be used in applications such as boost, buck, fly-back, push-pull and active clamp converter topologies.

Features and Benefits

• EnergyEfficient Technology.
• Oscillator-free designs.
• Low ripple current.
• Programmable current limit.
• Input logic level compatible.
• Wide voltage range.
• Flexible spin timing.
• High peak output current.

Applications

IR21368SPBF, as a low-side gate driver, has wide applications, the major ones being power supply and motor control. It is used in the following applications:

• High frequency switching power supplies.
• Variable frequency drive applications.
• Motor control.
• High voltage DC-DC converters.
• Current sensing.
• JP-switched Power Supplies.
• Telecom/ Industrial Power systems.

Working Principle

The working principle of IR21368SPBF is based on the use of a low sidegate driver, which functions mainly to provide the necessary gate drive power to turn on the Power MOSFET. The device is designed to provide both active low and active high control signals to the power MOSFET. It contains an oscillator section for providing a periodic controlling signal for setting the on/off periods for the power MOSFET. The driver also contains a protection circuit for providing a current limit and an over-temperature protection.

The IR21368SPBF also contains additional features such as an external bias voltage, adjustable output peak current limit, adjustable dead-time extension and fast slew rate adjustment. The peak current limit and dead-time adjustment can help to ensure better protection against any potential accidental high-power damage to the gate driver and the gate itself.

Package Details

IR21368SPBF comes in a 28-pin SOP16 package and can operate over a wide temperature range of -40 to +125°C. The most common package for this device is the QFN-type, which has a 0.4mm thickness and can be soldered to PCBs that support it.The operating range for the device is between 12V to 50V, with an output sink current of 4A and source current of 0.95A. The predicted short-circuit duration for the device is up to 4µs.

Conclusion

The IR21368SPBF is a low side gate driver designed to drive large N-channel MOSFETs and IGBTs with up to 950V. It has multiple features that make it suitable for applications in high frequency switching power supplies, motor control, and current sensing. The device also has an adjustable current limit, adjustable dead-time extension, and fast slew rate adjustment, making it a desirable choice for many high-power related applications. It is available in 28-pin SOP16 package and can operate over a wide temperature range from -40 to +125°C.

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