UC3872MG4

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

It is not uncommon to find applications using Power Management Integrated Circuits (PMICs) in the Lighting, Ballast Controllers category. These type of PMICs are useful for providing stable DC power to device even when the line power is fluctuating, protecting the device from overcurrent, and preventing it from over-voltage. One such PMIC is the UC3872MG4, manufactured by Microsemi Corporation. In this article, we will be discussing the application field and working principle of the UC3872MG4.

The UC3872MG4 is a low voltage, 1.5A 3-terminal Regulated Power Source. It has an operating temperature range from -40°C to +85°C, and it comes in an 8-lead Small Outline Integrated Circuit (SOIC) package. Its Onchip Regulated DC Output is available for any output current between 0 and 1.5A, and its output voltage ranging from 4.4V to 16V. These features make the UC3872MG4 ideal for applications that require low voltage, regulated power with current limiting, such as backlighting, LED drivers, and ballast controllers.

In terms of its working principle, the UC3872MG4 is essentially a voltage regulator that operates in current limit mode. It works by monitoring the current through its feedback pin (FB). When the current reaches a preset level, the IC limits the output current by turning off the internal power switch and thus reducing the voltage at the output. This prevents the IC from over-voltage thus protecting the device from over-voltage.

The UC3872MG4 also features active high voltage shutdown, which allows the IC to be turned off by applying a voltage higher than 4.4V on the shutdown pin (SHDN). This is useful in applications where the output voltage needs to be reset after a certain number of hours of use. It has a low quiescent current of 3.5mA and a current limit set point of 1.3A. In addition, it also has built-in thermal shutdown protection that prevents the IC from being damaged due to excessive heat.

In addition to its primary use in Lighting, Ballast Controllers, the UC3872MG4 can also be used in low current, high precision motor applications where precise control over current and speed is required. Its high reliability and accuracy makes it suitable for such applications that require precise control over the current limit, output voltage, and thermal shutdown point.

Overall, the UC3872MG4 is an ideal solution for applications that require low voltage, regulated power with current limiting, such as backlighting, LED drivers, and ballast controllers. Its wide operating temperature range, high reliability, and low quiescent current make it a suitable choice for such low current, high precision motor applications where precise control over current and speed is required.

The specific data is subject to PDF, and the above content is for reference