UC2823DWG4

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UC2823DWG4 Application Field and Working Principle

Introduction

UC2823DWG4 is a type of DC-to-DC Switching Controllers, and it is a voltage regulator which is mainly used in telecommunication equipment and switching power supply. It is able to provide constant voltage for the power supply. It is also equipped with a three-terminal adjustable current limit. The UC2823DWG4 DC-to-DC controllers provide an effective and efficient solution fordc/dc power applications. Furthermore, high accuracy current limit can be implemented by suitable external components.

Application Field

One of the major applications field of UC2823DWG4 voltage regulator is Telecom Equipment. The switching power supply environment in telecommunication equipment normally requires a DC-DC regulator which can most likely reflects a constant voltage and provide a high-speed switching switching rate while keep the output voltage constant. Moreover, the voltage regulator is also suited to occasions that need higher efficiency and lower EMI (electro-magnetic interference). Besides, it is used in notebooks computers, handheld devices, automotive applications and medical applications due to its efficient, low-noise and high power transfer characteristics.

Working Principle

The UC2823DWG4 is a DC-to-DC converter which consists of a voltage amplifier and a voltage regulator. Its voltage regulator section includes a precision reference, an error amplifier, and an internal voltage comparator. When an external voltage is supplied to the input pin, the output of the voltage amplifier will control the energy transfer from the input voltage to the output voltage. The output voltage is compared with the reference voltage in the error amplifier. The internal comparator will then adjust the output voltage to its desired level.The UC2823DWG4 also provides a current limit feature which can be implemented by two external resistors and an external capacitor, combined with the controller\'s internal oscillator. When the load current exceeds the set current limit, the oscillator will be activated and start to operate in PFM mode. This mode helps to reduce the output current to a safe level and protect the power supply from failure.

Conclusion

UC2823DWG4 DC-to-DC switching controllers is a voltage regulator that offer efficient, low-noise, and high power transfer characteristics, suitable for telecom equipment and switching power supplies. It also provides a three-terminal adjustable current limit to help protect the power supply from over current situation. Additionally, its internal comparator can adjust the output voltage to its desired level, and its oscillator, when combined with three external components, can set the current limit for the DC-to-DC converter.

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