IRU3137CSTRPBF

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IRU3137CSTRPBF Application Field and Working Principle

The IRU3137CSTRPBF is an advanced DC-DC buck switching controller that has been designed to increase the efficiency, performance, and versatility of a wide variety of DC-DC power conversion applications. This IC belongs to the PMIC – Voltage Regulators – DC DC Switching Controllers product category, boasting an ultra-low-on-resistance internal MOSFET, adjustable current foldback, shoot-through protection, and wide input voltage range. Its key features and specifications are outlined below.

Features and Specifications

• 8 V to 14 V operating range
• 1.25 A/1.585 A/2 A/2.41 A/2.85 A/3 A continuous output current
• Integrated low RDS(on) MOSFET
• Advanced current foldback to maximize SMPS efficiency
• Accuratecurrent limitation helps to protect the system from overloads
• Hysteresis of current limit setting designed to reduce overshoot and undershoot of output current limit
• Unique feedback control design eliminates system counter electromotive force (EMF) ringing
• Pulse-by-pulse current foldback circuitry prevents thermal runaway

Working Principle

The IRU3137CSTRPBF works in the buck topology, with a switching behavior that is adjustable to fit the requirements of different applications. It employs an internal MOSFET with low on-resistance and high switching speed, allowing for a low input current ripple. When the input voltage is above the regulation voltage and the duty cycle is less than 100%, the IC\'s output voltage can be regulated. With its wide operating voltage range, high efficiency power stages can be designed.

The current foldback feature available in the IRU3137CSTRPBF allows it to reduce the average power consumption when the load current is below the designed peak current limit. In addition, the shoot-through protection feature helps to protect the system from short circuits, overloads, and over-current. With this feature, the MOSFET switches are timing-synchronized, ensuring that one is always ON while the other is OFF.

The IRU3137CSTRPBF also features a unique feedback control design that eliminates system counter electromotive force (EMF) ringing. This control design works by monitoring the output voltage of the DC-DC stage, ensuring that the output voltage is kept within its regulation range. In addition, the IC also boasts advanced current limit circuitry, which helps to reduce uncertainty and increase system stability.

Overall, the IRU3137CSTRPBF is an advanced and versatile DC-DC switching controller. Its powerful features such as advanced current foldback, shoot-through protection, and wide input voltage range allow it to be used in a variety of DC-DC power conversion applications. With its high efficiency, performance, and robust design, it is an ideal solution for meeting the most demanding requirements.

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