LFC789D25CPWRG4

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The LFC789D25CPWRG4 is a linear regulator controller from Texas Instruments. It is a wide voltage range controller that supports input voltage from 2.3V up to 40V and output voltage up to 40V. It has an integrated N-MOSFET for higher efficiency and is designed for applications requiring low cost and high performance voltage regulation. The device also features low drop out operation, programmable current limit and over temperature protection.

Application Field

The LFC789D25CPWRG4 is a very useful device for portable electronics, providing a cost effective solution that can be used to regulate a wide range of AC and DC voltages in an efficient manner. Typical applications include portable media players, eBook readers, digital cameras, mobile phones, camcorders, laptop computers, and game consoles. It can also be used in fixed power supplies and other high power applications such as wireless base stations, servers, set top boxes, and industrial applications.

Working Principle

The LFC789D25CPWRG4 linear regulator controller works by using a feedback loop to apply a varying amount of control voltage to the pass transistor, based on the voltage at the output of the circuit. When the output voltage is higher than the reference voltage, the feedback loop will reduce the control voltage, resulting in lower current flow and thus bringing the output voltage back down to the desired level. Conversely, if the output voltage is lower than the reference, the feedback loop will increase the control voltage, thus allowing more current to flow and bringing the voltage back up to the reference. This constant cycle of feedback and voltage adjustment results in a highly efficient voltage regulation.

The LFC789D25CPWRG4 features an internal sense resistor, which is used to measure the output current. This current measurement is used to control the current limit, providing the user with a way to set the maximum output current, thus preventing damage to the circuit caused by too much current. The LFC789D25CPWRG4 also includes built-in over temperature protection and an adjustable soft start to reduce output inrush current. This makes it ideal for use in high power applications, providing a highly efficient and reliable power solution.

Conclusion

The LFC789D25CPWRG4 is an excellent choice for applications requiring reliable, efficient and cost-effective voltage regulation. Its wide voltage range combined with its integrated features allow it to be used in a variety of power management applications such as portable electronics, fixed power supplies, and high power systems. Its adjustable current limit and over temperature protection make it suitable for high power applications, while its adjustable soft start reduces output inrush current to prevent damage to the circuit. Its ability to regulate a wide range of voltages, combined with its low cost and efficiency make it a great choice for any voltage regulation requirement.

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