IRDC3859

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The IRDC3859 is a versatile family of off-line switch-mode power supplies (SMPS) controllers that are designed in the form of evaluation boards. This SMPS controller is primarily suitable for a variety of DC/DC and AC/DC off-line applications that include small to medium power supplies, power adapters, and mobile phone chargers. The IRDC3859 can also be used for LED lighting applications.

This evaluation board provides high performance with a wide range of features such as built-in surface-mount devices (SMD), adjustable frequency/voltage/current control, low standby power consumption, and accurate over-current protection. Moreover, the IRDC3859 is designed for both isolated and non-isolated DC/DC and AC/DC converters. It can also be used for flyback inverters that provide continuous current for LED strip lighting.

The IRDC3859\'s working principle is based on pulse-width modulation (PWM) control. Its main components include a high-voltage main switch, a driver transistor, a control voltage reference, a primary side detection circuit, and an auxiliary feedback voltage regulation loop. These components work together in order to deliver a clean and precise output voltage and current. When an input voltage is applied, the control voltage reference provides a reference voltage to the main switch, which turns on the primary drain-to-source voltage of the high-voltage main switch. This voltage is then amplified by the driver transistor, which activates the main switch. The main switch then conducts current from the input source, and this current is then regulated by the auxiliary feedback voltage regulation loop. This feedback ensures that the output voltage and current levels remain at optimum efficiency. The IRDC3859 also includes built-in over-current protection, which prevents the main switch from becoming damaged if an over-current situation occurs.

The IRDC3859 evaluation board is extremely useful for designers who are looking for a straightforward and efficient off-line SMPS controller. It is capable of handling a wide range of power supplies, power adapters, mobile phone chargers, and LED lighting applications. Its working principle based on pulse-width modulation (PWM) control provides a clean and precise output voltage and current. As well, the IRDC3859 is equipped with built-in over-current protection, making it an ideal controller for a variety of applications.

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