UC2861Q

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UC2861Q is a Pulse Width Modulation (PWM) controller that operates in AC-DC converters and off-line switchers. The device integrates several high-performance features, making it an ideal choice for a wide range of applications. In this article, we’ll take a look at the application field and working principle of the device.

Application Field

The UC2861Q is typically used in AC-DC converters and off-line switchers. It is built around a high-performance pulse-width-modulated (PWM) controller and offers outstanding features, making it suited for a variety of applications. It is suitable for LED lighting applications, residential and industrial AC-DC converters, and motor controls.

Features

The UC2861Q features an integrated sense voltage loop which increases efficiency and provides greater operating control. It also features programmable over-voltage and over-temperature protection, and soft-start circuitry to limit in-rush current. The device also has an adjustable oscillator frequency that ranges from 30kHz to 150kHz. The device offers adjustable over-current protection, as well as dynamic system response.

Working Principle

The UC2861Q integrates several high-performance features that enable it to maintain excellent performance across AC-DC converters and off-line switchers. It operates by monitoring a feedback control voltage that is proportional to the output voltage. This control voltage is compared to a programmed reference voltage, and the PWM controller modulates the output accordingly. It also corrects for fluctuations in output voltage, as well as over-voltage and over-temperature conditions.

Conclusion

UC2861Q is a pulse-width-modulated (PWM) controller that integrates several high-performance features that enable it to operate in AC-DC converters and offline switchers. It monitors a feedback control voltage and modulates the output according to programmed reference voltage—correcting for fluctuations in output voltage, as well as over-voltage and over-temperature conditions. As such, it is an ideal choice for LED lighting applications, residential and industrial AC-DC converters, and motor controls.

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