IR2151S

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Power management integrated circuits (PMIC) are an increasingly important segment of the application of integrated circuits. Gate drivers are one of the most critical and complex components of a PMIC system, and they have an important role to play in helping to control the voltage and current of a power distribution system. The IR2151S is an example of a low-side current-sensing gate driver designed specifically for automotive applications.

The IR2151S is a monolithic device with superior performance in high-frequency switching applications. The device integrates gate driver with current sense and low-side switch. The gate driver has Level-Shift technology to avoid shoot-through, and a Predriver Power-up/Soft Turn-on feature to reduce the switching losses in the high-side FET. The integrated low-side current sense feature provides a simple, accurate, and easily adaptable solution to current–sensing applications.

In an automotive application the IR2151S is typically used as a power supply regulator to control the voltage and current of a power distribution system. The device is used to drive an external N-channel MOSFET as a switch, to regulate the current flow in the power distribution network. The current supplied by the IR2151S is sensed and then the gate driver continuously adjusts the start of the gate drive pulse to minimize the switching losses and to improve the efficiency of the power distribution system. The device can also be used in a variety of applications such as motor control, lighting control, and charging control.

The IR2151S is available in an 8-pin SOIC package. Its peak switching current is 3A, and its maximum gate drive is 12V. The device features an adjustable pre-driver power-up and soft turn-on, adjustable blanking time, adjustable dead-time, adjustable current-limit threshold, and adjustable current-sensing accuracy. The device is designed to operate over a wide temperature range of -40C to +125C, and has a maximum operating frequency of 500kHz.

The working principle of the IR2151S is based on a technique known as pulse-width modulation (PWM). PWM works by varying the duty cycle of the output waveform. In a PWM system, the time spent at each voltage level is varied by the duty cycle, and this produces an average voltage which is proportional to the duty cycle. The IR2151S uses this technique to control the gate drive of the external MOSFET switch. The device senses the current flowing through the MOSFET switch, and then adjusts the start of the gate drive pulse to ensure optimum switching efficiency. The adjustable current limit threshold allows the device to limit the amount of current flowing through the switch, and thereby protects the system from excessive current.

The IR2151S is an excellent choice for a variety of automotive power supply applications. Its low on-resistance, peak current, and wide temperature range make it ideal for use in a variety of automotive applications. The device also has adjustable parameters such as pre-driver power-up and soft turn-on, blanking time, dead-time, and current-sense accuracy, which makes it easy to customize the device for a specific application. The IR2151S is a powerful and reliable device, with excellent performance characteristics, making it well suited for automotive power distribution applications.

The specific data is subject to PDF, and the above content is for reference