UC2843AQD8

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UC2843AQD8 is a high-performance pulse-width modulation (PWM) switching voltage regulator controller manufactured by Unitrode. It offers high-performance features, such as current mode control, short circuit protection and over-voltage protection, in a single package. This makes it ideal for applications such as DC/DC converters, motor controllers, SMPS controllers, and simple switching regulators.

UC2843AQD8 Application Field

The UC2843AQD8 is a high-performance switching voltage regulator controller that can be used in a wide range of applications, such as DC/DC converters, motor controllers, SMPS controllers, and simple switching regulators. In DC/DC converters, it can be used to regulate the output voltage, control the load current, and provide protection for short-circuits and over-voltage. In motor controllers, it can be used to control the speed and torque of the motor. In SMPS controllers, it can be used to control the output power, provide protection from short-circuits and over-voltage, and enable remote control. In simple switching regulators, it can be used to regulate the output voltage and provide protection from short-circuits and over-voltage.

UC2843AQD8 Working Principles

The UC2843AQD8 operates using pulse-width modulation (PWM) control. Its control circuit is built around a high-performance current-mode PWM controller and low-power integrated circuits. The current-mode control is enabled by a high-voltage sense FET connected to a current-sense amplifier. The amplifier compares the sensed output current to an internal reference voltage, providing a voltage signal to the PWM controller. The PWM controller takes this voltage signal, along with a reference voltage set by an external resistor, to OA1C. It then uses this information to produce a switching signal, which controls the output voltage.

The UC2843AQD8 provides short-circuit and over-voltage protection, with short-circuit protection enabled by the sensing FET connected to the current-sense amplifier. If the output current exceeds the internal reference voltage, the voltage signal to the PWM controller is turned off, shutting down the switching signal and preventing further current flow. Over-voltage protection is enabled by OA1C. If the output voltage of the converter exceeds the reference voltage set by the external resistor, OA1C will turn off the switching signal and prevent further current flow.

Conclusion

In conclusion, the UC2843AQD8 is a high-performance pulse-width modulation (PWM) switching voltage regulator controller manufactured by Unitrode. It can be used in a wide range of applications, such as DC/DC converters, motor controllers, SMPS controllers, and simple switching regulators. Its control circuit is built around a high-performance current-mode PWM controller and low-power integrated circuits. The UC2843AQD8 provides short-circuit and over-voltage protection, with short-circuit protection enabled by the sensing FET connected to the current-sense amplifier, and over-voltage protection enabled by OA1C.

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