L5988D

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Introduction

The L5988D is a switching regulator designed to regulate a regulated output voltage or current. It is a DC-DC converter that operates at a preset constant frequency and operates by varying the duty cycle of its switching transistor. The switching regulator is an efficient method of DC-DC conversion. The L5988D is a current mode switch mode power supply, primarily intended for offline applications. It has been designed for pulse width modulation (PWM) applications, and is suitable for a wide variety of applications where a stable output voltage and current needs to be maintained.

Application Fields

The L5988D switching regulator is able to accomplish conversion of input to output voltages and currents. This makes it well suited for applications where one voltage is to be converted to another, such as in power supplies, automotive systems and industrial automation control. Examples of its uses include:

• Power supply: The L5988D can be used to efficiently convert an AC line voltage to a clean DC voltage. This is useful in cases where little on-board power management is needed as the L5988D allows for efficient conversion of AC line voltage to a regulated DC output.
• Automotive systems: The input voltage range is from 6 V to 18 V and the output voltage is adjustable from 0.8 V to 15 V. It can be used in radio systems, car audio, multimedia systems, and advanced diagnostic systems.
• Industrial automation: The L5988D provides a high level of accuracy and reliability, making it ideal for use in industrial automation control. It is used in process control, robotics, and instrumentation applications.

Working Principle

The L5988D works by controlling the duty cycle, or on/off state, of an internal switching transistor. The duty cycle is governed by a control loop which senses feedback from the output of the converter. The control loop monitors the output voltage and current of the converter and adjusts the duty cycle of the transistor accordingly. In this way, the output voltage and current can be accurately regulated. The L5988D also features a low (undervoltage) and over current lockout, allowing it to safely shut down when a fault is detected.

The L5988D also features a low standby current and low active current in operation. This makes it more efficient than linear regulator designs, allowing it to achieve up to 95% efficiency in many applications. The L5988D is able to operate at temperatures up to 80°C and is available in both standard and low temperature versions.

In summary, the L5988D is a switching regulator which is designed to precisely regulate the output voltage or current of the converter. It is very efficient, has a wide input voltage range, and is suitable for a variety of applications. It is also designed to be cost effective and reliable.

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