IR2181S

Current - Peak Output (Source, Sink):	1.9A, 2.3A
Base Part Number:	IR2181S
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 150°C (TJ)
Rise / Fall Time (Typ):	40ns, 20ns
High Side Voltage - Max (Bootstrap):	600V
Input Type:	Non-Inverting
Series:	--
Logic Voltage - VIL, VIH:	0.8V, 2.7V
Voltage - Supply:	10 V ~ 20 V
Gate Type:	IGBT, N-Channel MOSFET
Number of Drivers:	2
Channel Type:	Independent
Driven Configuration:	Half-Bridge
Part Status:	Obsolete
Packaging:	Tube

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IR2181S Application Field and Working Principle

Introduction

Power management integrated circuits (PMICs) are complex integrated circuits (ICs) that are responsible for regulating and managing the power supply in modern electronic systems. Gate drivers are a subset of the PMICs that provide the interface between gate drive circuits and voltage sources. The IR2181S gate driver is a popular device which provides a low-cost, low-noise, unpacked gate driver solution for various applications. This article will discuss the application field and working principle of the IR2181S gate driver.

Application Field of the IR2181S Gate Driver

The IR2181S is an unpacked driver suitable for driving MOSFET transistors and IGBTs for power converters and power systems. The device offers a wide range of features and benefits, including high peak and low oscillated output transistor current, low propagation delay, fast transient response, wide operating temperature range, and minimal EMI (electromagnetic interference). These features make it suitable for many end applications, including automotive/industrial power systems, high voltage power systems, consumer electronics, and industrial drive circuits.

Working Principle of the IR2181S Gate Driver

The main function of the IR2181S is to provide an efficient voltage and current interface between the gate drive circuits and the voltage source. It consists of three main components: Gate Driver Input, Gate Driver Output, and the Gate Driver Power Down circuit.The Gate Driver Input block is used to provide the voltage to the device and to accept the logic level signals from the CPU or other logic source. The output of the Input block is then connected to the Gate Driver Output block. The output stage consists of two MOSFET transistors connected in a bridge topology, which is used to provide the power to the load. Finally, the Gate Driver Power Down circuit is used to bring the device out of standby mode.The device is designed to provide an output voltage of 10V with a peak output current of 4A and a low-noise operation. It provides an adjustable rise and fall time for the output voltage and an adjustable PWM frequency. This makes it suitable for powering loads that require different switching frequencies and effectively eliminates ringing and EMI.

Conclusion

The IR2181S gate driver is a versatile, low-cost, and low-noise driver suitable for a wide range of applications. It provides an efficient voltage and current interface between the gate drive circuits and the voltage source and offers adjustable rise and fall time and adjustable PWM frequencies. This device can be used in automotive/industrial power systems, high voltage power systems, consumer electronics, and industrial drive circuits.

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