AXH003A0X4-SR

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The selection of DC-DC converters is critical for today\'s electric vehicle manufacturers to ensure the highest efficiency power delivery. The AXH003A0X4-SR DC-DC converter provides exceptional features such as high input voltage capacity, fast transient response, tightly regulated output, and low output noise. In this article, we\'ll explain the application field of the AXH003A0X4-SR and its working principle.

Application Field

The AXH003A0X4-SR is a high-efficiency synchronous buck converter designed for automotive, industrial, and consumer applications. It is a monolithic integrated circuit and comes with a fully integrated 600V, 12A high-side MOSFET and features a wide input voltage range up to 72V. The output voltage is adjustable from 0.8V to 60V with an efficiency up to 95% and a transient response of 20 μs. It also supports Power Path and Sleep modes to reduce power consumption when system is in idle states. The device can operate in Burst Mode, PFM, and CCM modes for various load conditions to provide excellent reliability and performance.

In auto applications, AXH003A0X4-SR is used in battery management systems to maximize battery pack life and minimize power losses. Typical automotive applications include DC-DC converters for powertrain systems, inverters for air conditioners, electromechanical power steering systems, lighting systems, and charging systems. Also, automotive systems such as vehicle-to-grid (V2G), vehicle-to-infrastructure (V2I), and vehicle-to-home (V2H) are also gaining traction in the market and the AXH003A0X4-SR is an ideal solution for such applications.

Working Principle

The AXH003A0X4-SR is a DC-DC converter that can reduce a higher input voltage to a lower output voltage. This is achieved by using its integrated high-side MOSFET to switch and regulate the transfer of current between the input source and the output terminals. The starting voltage is controlled by an external feedback circuit or a microcontroller. When the power is applied to the input source, the internal MOSFET is switched on and current travels through it. The current is then stored in an output inductor and the stored energy is then delivered through a range of internal control components and circuitry. This process is known as buck conversion and it allows the AXH003A0X4-SR to reduce the input voltage seen on the output terminals.

The AXH003A0X4-SR also supports various operating modes such as Burst mode operation (BMO), Pulse Frequency Modulation (PFM), Constant Conduction Mode (CCM) operation. In BMO operation, the device uses higher switching frequency combined with a low duty cycle to improve efficiency and reduce power consumption. PFM mode is used when the system requires low efficiency operation, and it utilizes lower switching frequency and higher duty cycle to reduce the power consumption. The CCM mode, on the other hand, provides continuous current flow and good regulation when the load is steady.

Additionally, the AXH003A0X4-SR also includes several protection features to minimize the damage in extreme situations. The device is integrated with a programmable, overvoltage protection and can detect feedback errors or short circuit conditions. This helps ensure that the device is operating safely and reliably.

Conclusion

The AXH003A0X4-SR DC-DC converter is designed for a variety of automotive, industrial, and consumer applications. This device makes it possible to reduce higher input voltage levels to a lower output voltage by using an integrated high-side MOSFET. The device also supports various operating modes including Burst mode, Pulse Frequency Modulation, and Constant Conduction Mode, and offers features such as overvoltage protection and short circuit protection. The AXH003A0X4-SR is a reliable and efficient solution for applications in the automotive, industrial, and consumer industries.

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