IRS21271PBF

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Integrated circuit (IC) technology has enabled a wide range of applications in the electronics industry. Power Management Integrated Circuits (PMICs) are integrated circuits that serve the purpose of controlling, regulating and protecting the power of a device or system. One such PMIC is the IRS21271PBF from International Rectifier. This IC is a high and low side MOSFET driver integrated circuit which has several advantages over traditional gate drivers.

Application Field

The IRS21271PBF gate driver can be used in various applications such as power converters, power controllers, DC-DC converters, servo and motor controllers and amplifiers in the industrial, telecommunication and consumer fields. It is particularly suited for buck, boost and SEPIC converters, as well as H-bridge motor drivers and active clamp circuits. Furthermore, it can be used as a gate driver of input logic signals in the switching frequency range up to 700 kHz, while operating the MOSFET and associated protection devices.

Features

The IRS21271PBF gate driver has several important features, designed to make its use convenient, safe and efficient. The over-temperature protection feature employs a self-reset thermal shutdown system which can detect when the temperature of the device exceeds a certain threshold and automatically shut off the power supply. The shoot through protection feature automatically shuts down the power supply when both the high side and low side outputs are being actuated at the same time, thus preventing a short circuit across the load and potential damage. Other features include a supply voltage of up to 36V, a quiescent current of 15 mA max, an output current of 2 A, an output voltage of 1.2V-35V, an operating temperature range of -40C to 150C and a propagation delay of 300ns.

Working Principle

The working principle of the IRS21271PBF gate driver is based on a CMOS technology for low power consumption, high speed and low noise. The device has two input pins, a high side pin (INH) and a low side pin (INL). When the input pins are triggered, the output pins (HS and LS) are set to the active logic level. The logic levels of the output pins can be either high-side or low-side. High-side logic is typically used when the gate voltage needs to be higher than the system voltage. In low-side logic, the output is automatically inverted to ensure that the gate source is below ground.

The gate driver has a number of advanced protection features designed to ensure that the MOSFET does not suffer from any damage. The device has a surface mount package which ensures that the circuit can operate at high frequencies and is cooling efficiently. It has an on-chip circuit which monitors the voltage across the MOSFET, and can detect any overvoltage or undervoltage conditions. The device is also protected against electro-static discharge (ESD) and reverse-current conditions, ensuring that the MOSFET remains safe from any unintended conditions which could damage it.

Conclusion

The IRS21271PBF is a versatile gate driver IC which can be used in a number of applications such as power converters, motor controllers and power controllers. The device operates on a CMOS technology and features integrated protection features such as over-temperature, shoot through and ESD protections. Furthermore, it has a wide operating range and can operate at high frequencies and low power consumption. The device is ideal for applications that require reliable and efficient power control.

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