IR3871MTRPBF

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The IR3871MTRPBF is a non-synchronous, active-clamp buck (step-down) converter and voltage regulator device. It is a member of IR’s Buck-Boost family of DC-DC regulators. It is supplied with an input voltage range from 2.5V to 36V with a 10A continuous and 14A peak output current. The adjustable output voltage range is from 0.3V to 40V and it provides an integrated low ripple Burst Mode^® operation, as well as external synchronization.

The IR3871MTRPBF is a current-mode type DC-DC converter that offers a range of features designed to reduce power consumption and improve power efficiency. It is designed to supply highly efficient, accurate, and stable voltage regulation during heavy load transients, while providing an optimal combination of power savings and performance, even at light loads. It can operate in either continuous or pulsed mode, making it suitable for use with most microcontroller, memory, and mobile applications.

Key features of the IR3871MTRPBF include a wide input voltage range, adjustable output voltage range, low quiescent current, high efficiency, flexible synchronization options, and support for up to 5A load currents. The device also features a high-speed, low-voltage startup, short-circuit protection, under voltage lockout, and thermal shutdown. It also supports multiple output voltage options for use in systems that require higher currents or higher output voltages.

The IR3871MTRPBF is also designed with a wide range of safety features, such as over-temperature protection and over-current protection. The device also has a built-in soft-start feature, which helps minimize inrush current during startup. Additionally, the device is equipped with a high-accuracy voltage reference to ensure accurate voltage regulation.

The IR3871MTRPBF application field can be associated with a range of DC-DC converters and voltage regulators, such as Uninterruptible Power Supplies (UPS), telecom and data communication systems, medical equipment, automotive and industrial equipment, LED lighting systems, and embedded systems.

The working principle of the IR3871MTRPBF involves a high-frequency, resonant switching architecture that allows the device to regulate the output voltage with high efficiency across a wide load range. The device is composed of two power stages—a high-side MOSFET, and a low-side MOSFET—that conduct energy inversely. During a cycle, the high-side MOSFET charges the inductor with input energy, while the low-side MOSFET discharges the inductor to the output. This process is repeated in an alternating manner, and the output voltage is regulated by the current-mode control loop.

The IR3871MTRPBF also has a unique slew rate control feature that allows it to operate in low-ripple Burst Mode^® to reduce EMI and reduce overall power consumption. During burst mode, the output current is essentially continuous. This allows the device to maintain a high efficiency even at low loads, where the output current is reduced.

Overall, the IR3871MTRPBF is a versatile, efficient, and reliable DC-DC converter and voltage regulator device. It offers a wide range of features designed to improve power efficiency and reduce power consumption, while providing stable voltage regulation over a wide range of load currents. It is ideal for use in Uninterruptible Power Supplies, telecom and data communication systems, medical equipment, automotive and industrial equipment, LED lighting systems, and embedded systems.

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