LD2982BM31R

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LD2982BM31R is a linear three-terminal Adjustable and Fixed LED Driver from STMicroelectronics. It is designed to drive a single white LED from a constant current source with a switching frequency of 1MHz. It is capable of regulating input a voltage in the range of 3.3V to 26V and enables the output current to be adjusted to 50mA with a precision of 0.1%. It is also capable of regulating a constant voltage as well as mechanical dimming. It features programmable slew rate management and an advanced current control loop based on a numerical algorithm which ensures a fast start up time and a constant current in the wide range of applications.

With its adjustable output current, LD2982BM31R is suitable for a wide range of applications ranging from driving white LEDs to driving lighting solutions such as LED strips, LED clusters, etc. It is capable of providing highly accurate current regulation by temperature and operating environment, which is essential for LED applications to creating the desired accuracy of light output. It can also provide excellent current balance in LED clusters with multiple LED currents, which is essential for maintaining balanced colors and a uniform brightness level.

STMicroelectronics LD2982BM31R device works on the principle of linear regulation of current. This regulation involves sensing the output current and comparing it with a reference current to regulate the output current proportionately. The output current is regulated by varying the input voltage, which is done by an external voltage source, usually the mains AC voltage. The voltage is then rectified, filtered and regulated by an internal regulator so that the output current is constant and unaffected by input voltage or temperature changes.

The LD2982BM31R employs a high level of integration to support a wide range of applications with improved precision. It features a low dropout linear regulator (LDO) and an automated power saving feature which allows it to reduce power consumption by up to 50%. The device also features an adjustable idle all-off mode which can be used to reduce the power consumption during periods of inactivity. It also includes over-voltage, over-current and reverse polarity protection.

STMicroelectronics LD2982BM31R device is designed for applications where high efficiency, accuracy and stability are needed. It has been tested and evaluated for a wide range of applications such as general purpose industrial lighting, automotive lighting, display and signage, and architectural lighting.

In summary, STMicroelectronics LD2982BM31R is a three-terminal device from STMicroelectronics capable of driving a single white LED from a constant current source with a switching frequency of 1MHz. It offers adjustable and fixed LED driver with precision current regulation for a wide range of applications and provides excellent current balance in LED clusters with multiple LED currents. It works on the principle of linear regulation of current and features a low dropout linear regulator (LDO) and automatic power saving features.

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