LM2682M/NOPB

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LM2682M/NOPB Application Field and Working Principle

The LM2682M/NOPB voltage regulator is part of Texas Instruments’ wide range of switching regulators, which are designed to facilitate the use of modern electronic components. It is one of the most versatile positions in the DC/DC switching regulator family, and it can be used in a variety of applications, such as powering small systems, providing efficient battery charging and various domestic and industrial functions.

Application Scope

This integrated circuit is most commonly used for powering basebands, portables and SIM cards, as well as for low-power MP3 players and other consumer devices, such as white goods. Other applications include various domestic and industrial functions, communication systems, car on-board equipment, robotics, embedded systems, and PC peripherals. The LM2682M/NOPB can also be used for powering small systems, such as SPI and other buses, as well as for providing efficient charging for Ni-Cd and Ni-MH batteries.

Functional Description

The LM2682M/NOPB integrated circuit works as an isolated DC/DC switching regulator, which provides high-efficiency regulation by using a synchronous rectification circuit design. The internal control circuit regulates the converter\'s steady state characteristics, allowing the system to stabilize to its setpoint. The input voltage can be as high as 28V and the output voltage can be adjusted between 0.8V and 5.5V with an accuracy of 0.3V. It mainly comprises six power components: the power switch, opto-coupler, rectifiers and feedback regulator. The amplifier is used for driving the gate of the power switch, while the feedback loop ensures the output voltage remains stable.

The LM2682M/NOPB is capable of providing an 18A load current and an efficiency of up to 90% over a wide input voltage range. It also has a high switching frequency of up to 500kHz, which makes it suitable for applications that require a faster response. Additionally, it has an over-temperature protection, a voltage programming limit circuit, an output enable pin and an input-voltage sensing circuit. It also has a fault flag, thermal shutdown latch and an optional low-power stand-by mode.

Conclusion

The LM2682M/NOPB is a highly capable DC/DC switching regulator which can be used in a variety of applications, ranging from communication systems, robotics and embedded systems to consumer electronics. It is designed to provide a high load current, a high efficiency and a high switching frequency, which make it a great choice for powering small systems, providing efficient battery charging and various domestic and industrial functions.

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