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Introduction

The STL03710412PCQ is a high-efficiency DC/DC converter specifically designed to simplify and improve the performance of DC power supplies. It is widely used in various applications, such as computing, networking, medical, industrial, automotive, and digital audio/video products.

Application fields

The STL03710412PCQ is mainly used in computing, networking, medical, industrial, automotive, and digital audio/video products, as well as in other applications. It can provide precision DC/DC regulation with a minimum 4% load step stability.In computing, the DC/DC converter can support 4V to 13.2V DC input range and up to 4A output current for cooling fans, USB ports, ventilation, etc., while also delivering excellent load-step stability.In networking, it can increase system efficiency with its power adjustment capabilities. Moreover, as an on-board DC/DC converter, it is designed to meet the latest EMI and ESD environmental standards, providing noise mitigation over a wide frequency range.In medical, industrial, and automotive applications, the converter supports both regulated and unregulated input voltages. It reduces power supply losses through peak current control and spread spectrum techniques, ensuring lower EMI emissions and improved thermal efficiency.In digital audio/video applications, the device can eliminate the need for bulky linear regards, thus decreasing component size and cost. Moreover, it supports an input voltage range of 4–35V and is capable of outputting a maximum power of up to 9W.

Working principle

The STL03710412PCQ uses peak current control and spread spectrum to reduce power dissipation and reduce EMI emissions. It is designed with two stages of voltage regulation; the first stage is the input regulator that sets the output voltage to the desired value. The second stage is the output regulator that maintains the required output voltage set by the input regulator.The first stage is responsible for establishing the desired output voltage based on the input voltage and desired output current. It is composed of a series of voltage-regulating components, such as, a linear regulator, an oscillator, and a control circuit. The output voltage is regulated by adjusting the current flow within the power circuit.The second stage is responsible for maintaining the voltage set by the first stage. It is composed of a pulse-width modulator, an optocoupler, and a control circuit. The optocoupler is used to provide feedback from the output to the input circuit. The modulator controls the current flowing through the optocoupler, thus allowing the output voltage to be maintained at the desired level.In summary, the STL03710412PCQ DC/DC converter provides high efficiency, wide input and output voltage range, and excellent load-step stability. It is the ideal choice for various applications, particularly those that require a low-power and cost-effective solution.

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