MCP1643T-I/MS

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PMIC (power management IC) is a type of integrated circuit (IC) specifically designed for managing power in electronic systems by providing the appropriate voltage and current sources for the given load. LED drivers are one type of PMIC which is widely used in controlling the driving current of LEDs to regulate brightness and color. The MCP1643T-I/MS is an LED driver IC that combines a Constant Current LED Driver with a PWM DC/DC Buck Controller to create the intelligent LED Lighting product. It meets the growing needs of lighting applications to achieve programmable illumination and switch mode power efficiency.

Overview

The main components of the MCP1643T-I/MS are a Constant Current LED Driver and a PWM DC/DC Buck Converter. It features an integrated 2A gate driver with a switching frequency of up to 20kHz. In addition, the MCP1643T-I/MS includes a low-side current sense amplifier which enables fast current sensing to protect the LEDs from over-current conditions. The device also includes three 10-bit adjustable registers for programming the LED current, the switching frequency and power down mode. All together, these features provide the user with the ability to control the LED current, accurately and precisely.

Application Fields

The MCP1643T-I/MS is specifically designed for use in applications with high current power requirements such as:

• High efficiency, constant current, lighting applications
• DC/DC Buck Controller applications
• Control and dimming of light emitting diodes (LEDs)

The device can be used to drive a variety of high-current lighting applications that require precise current control while also increasing system efficiency.

Working Principle

The main function of MCP1643T-I/MS is to provide precise current control for LED drivers. It operates in constant current mode for LED current control, and in PWM mode for DC/DC buck mode. In constant current mode, the device regulates the current in the LED load using a programmable output current register. By controlling the LED current, the device can accurately adjust the LED brightness and color. Furthermore, the device also includes several protection features, such as Over-Current Protection (OCP) and Thermal Shut-Down Protection (TSD).

In PWM DC/DC Buck Controller mode, the MCP1643T-I/MS acts as a buck converter which can provide power efficiency. This mode is well suited for operating in applications that require high amounts of current, such as those encountered in light emitting diodes (LEDs). The device allows for dynamic control of the output voltage and current, to reduce power dissipation and conserve energy. The high-side current sensing also allows for high system efficiency. In addition, the device features a low-side current sense amplifier that enables fast current sensing, to protect the LEDs from over-current conditions.

The MCP1643T-I/MS is a highly integrated PMIC LED Driver which meets the growing needs of lighting applications to achieve programmable illumination and switch mode power efficiency. It is specifically designed for use in high current applications such as those encountered in LED lighting, providing a convenient and reliable solution for LED lighting designs.

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