UC3842BDR2G Integrated Circuits (ICs)

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The UC3842BDR2G is an efficient one-quadrant pulse-width modulation (PWM) switching controller. This device is the most suitable for controlling either an active clamp reset forward converter or a buck converter. The device features a bipolar output drive and includes a temperature compensated precision reference. It is typically used in voltage regulation, providing power supply regulation and power switching applications.

Application Field

The UC3842BDR2G is a precision monolithic PWM switching controller. It can be used to design pulsed regulated power supplies, regulated dc-to-dc converters, motor drives, regulated service supplies, and real-time clock linear control systems. It offers tight line regulation, precise current-limiting control, and temperature compensated line regulation.

The UC3842BDR2G can be used in temperature control applications such as ovens, automotive HVAC systems, motor drives, and many others. It can also be used in multiple switching applications such as inverters, dc-to-dc converters, and pulse power systems.

The device is ideal for many standard regulated power supplies due to its precise output regulation. It takes very little power from the line to operate and is often used in switch mode power supplies where minimal power dissipation is necessary. Its wide input voltage range allows it to be used from 6 V to 60 V.

Working Principle

The UC3842BDR2G uses pulse width modulation (PWM) to regulate the output voltage.In a PWM circuit, the current drawn by the load is pulsed on and off at a constant frequency, but with varying duty cycle. The average current drawn by the load is directly proportional to the duty cycle. The voltage across the load is equal to the ‘on’ time multiplied by the input voltage.The UC3842BDR2G accomplishes this with its error amplifier and timing circuitry. The reference voltage from an external source is compared to an internal voltage reference. This comparison produces an error voltage which is used to control the current flowing through the output driver.The output driver is turned ‘on’ and ‘off’ in a controlled manner. During the ‘on’ time, current will flow through the output driver and deliver a constant voltage across the load. The ‘off’ time determines the amount of current flowing through the load. The duty cycle is constantly adjusted to keep the output voltage regulated. This technique allows the device to regulate voltage over a wide range of input and output voltages.

The UC3842BDR2G can be used as a stand alone device or in conjunction with other devices to provide advanced features such as soft start, remote sensing, fault protection, and other features.

The UC3842BDR2G is meant for use in many commercial applications, such as air cleaners and air conditioners, audio equipment, medical applications, power supplies, UPS systems, VFDs, and anything else that require precise control and regulation of voltage.

The specific data is subject to PDF, and the above content is for reference