CHL8103-11CRT

Series:	*
Part Status:	Obsolete

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CHL8103-11CRT Application Field and Working Principle

Introduction

The CHL8103-11CRT is a buck switching controller with a wide array of integrated features specifically designed to help design engineers meet the challenges of cost-optimized low-current powered systems. This product is suitable for a broad range of applications such as, but not limited to, LED lighting and low-power systems, industrial control systems, and battery powered systems.

Application Field

The CHL8103-11CRT is a high-performance switching controller designed for buck DC-DC converters, specifically for low-current applications in low-voltage, low-current systems. This component can be used in a wide range of applications such as, but not limited to, LED lighting and low-power systems, industrial control systems, and battery powered systems. It is ideal for applications with high power efficiency requirements, excellent line and load regulation, and adjustable output voltage settings.

Features

The CHL8103-11CRT is ideally suited for low-current applications in low-voltage, low-current systems. It offers a range of features that make it very attractive in a wide range of applications, including:

• Low quiescent current of 175uA, which helps optimize power efficiency, flexibility, and cost
• Internal voltage reference, allowing for adjustable output voltage settings
• Digital wire interface, providing design flexibility and improved system performance
• Integrated output current sensing, for improved stability, accuracy, and control
• Wide input voltage range from 4.5V to 48V and output voltage range from 0.8V to 2.75V, providing design flexibility
• High switching frequency up to 2MHz, providing improved power efficiency and system performance
• Comprehensive protection features, including thermal protection and over-current protection (OCP)
• PWM Dimming and Soft-start, allowing for improved design flexibility

Working Principle

The CHL8103-11CRT is a buck DC-DC converter and is typically used in a boost configuration. The converter works by connecting the input voltage to the internal high-side and low-side power MOSFETs through a feedback control circuit. The CHL8103-11CRT senses the input voltage, output voltage, and output current conditions to provide the proper control signals for each of the MOSFETs.The input voltage is connected to the PWM IN node and is then converted into a PWM signal at a certain duty cycle. This PWM signal is then applied to the high-side and low-side MOSFETs, turning them on and off at a certain duty cycle. The amount of duty cycle is determined by the output voltage and current. When the PWM signal is off, the MOSFETs are off and the output voltage is maintained the same.The CHL8103-11CRT also features an output voltage regulation loop and a feedback circuit to ensure that the output voltage remains constant. It also features additional features such as PWM dimming, soft-start, and over-current protection to allow for improved design flexibility and safety.

Conclusion

The CHL8103-11CRT offers a wide range of features specifically tailored for low-current, low-voltage applications. Its wide input voltage range and adjustable output voltage settings, combined with its low quiescent current, makes it an ideal choice for low-power systems such as LED lighting and low-power systems, industrial control systems, and battery powered systems. It is designed with comprehensive safety features, such as thermal protection and OCP, to ensure high levels of protection for the user.

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