LW025F871

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DC DC converters are electronic circuits that convert direct current from one voltage level to another. They have a wide range of applications, including powering electronic devices and charging batteries. One such converter is the LW025F871, which offers efficient and reliable power conversion from input voltage levels of 3.3 to 5.5V and output voltage levels of ±2.5V. In this article, we will discuss the application field and working principle of the LW025F871.

The LW025F871 includes an automatic power-saving shutdown mode, a fault protection circuit, and an adjustable output voltage. It is ideal for automotive, and consumer electronics applications, as well as on-board/on-board systems. It is also suitable for a variety of telecom, networking, and industrial applications where power stability is required.

The LW025F871 is a synchronous step-down DC converter with an adjustable output voltage. It utilizes a switched-mode circuit design which utilizes insulated gate power transistors to convert input voltages into constant voltage/current outputs. The switching frequency of the LW025F871 is approximately 750kHz, and it employs a soft-start circuit to reduce the start-up transient surge current. It is built with over-voltage/current/temperature protection circuit and a power MOSFET process. The maximum output current is 25A, and the maximum continuous output power is 125W.

The LW025F871 operates in a continuous conduction mode (CCM) and consists of a feedback control loop composed of a low-side power MOSFET, an opto-coupler, an error amplifier, a power-supply-on bias circuit, and a rectifier diode. The power MOSFET turns on when the voltage across the output capacitor is less than the target voltage, and off when the voltage is greater than the target voltage, thereby controlling the output voltage. The error amplifier works in conjunction with the feedback control loop to adjust the output voltage and ensure it meets the set point.

The LW025F871 also includes an adjustable output voltage, allowing the user to set an output voltage between 2 and 3 volts. Additionally, the converter provides a fault protection circuit which will shut down the circuit in the event of an over-voltage or over-current situation. The converter can also be set to a power-saving mode which will reduce the total power draw. This feature is particularly useful when the converter is being used in applications that require extended battery life.

In summary, the LW025F871 is an efficient and reliable synchronous step-down DC converter with an adjustable output voltage. It is ideal for a wide variety of automotive, consumer electronics, telecom, networking, and industrial applications. It is built with an over-voltage/current/temperature protection circuit and a power MOSFET process, and also includes a power-saving shutdown mode and a fault protection circuit. With its adjustable output voltage and fault protection circuit, the LW025F871 can help ensure reliable power conversion while providing electronic devices and batteries with a stable output voltage.

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