Texas Instruments

UC3846DWTR  

DC DC Switching Controllers

The UC3846DWTR is a high-voltage, high-power pulse-width modulation (PWM) controller manufactured by Texas Instruments. It is designed for use in a variety of power conversion applications, including offline power supplies, DC-DC converters, and motor control circuits.

Description:

The UC3846DWTR is a monolithic integrated circuit that provides all the features required to implement a PWM controller. It includes an error amplifier, a current sensing comparator, a modulation control circuit, a dead time control circuit, and a high-voltage output stage. The device is available in a thermally enhanced small-outline integrated circuit (SOIC) package.

Features:

1. High-voltage operation: The UC3846DWTR can operate with input voltages up to 600V, making it suitable for a wide range of power conversion applications.
2. PWM control: The device uses pulse-width modulation to regulate the output voltage and current, providing high efficiency and fast transient response.
3. Current sensing: The UC3846DWTR includes a current sensing comparator that allows for precise control of the output current.
4. Dead time control: The device features a dead time control circuit that ensures the proper timing between the switching of the high-side and low-side MOSFETs, preventing shoot-through and improving overall system efficiency.
5. Thermal protection: The UC3846DWTR includes thermal shutdown and over-temperature warning features to protect the device and the overall system from overheating.
6. Small package: The device is available in a compact SOIC package, making it suitable for space-constrained applications.

Applications:

The UC3846DWTR is suitable for a wide range of power conversion applications, including:

1. Offline power supplies: The device can be used to control the switching frequency and output voltage in offline power supplies, providing efficient power conversion from the AC mains to a regulated DC output.
2. DC-DC converters: The UC3846DWTR can be used in both step-up (boost) and step-down (buck) converters, providing efficient power conversion between different DC voltage levels.
3. Motor control: The device can be used in motor control applications, such as brushless DC (BLDC) motor drives, to regulate the speed and torque of the motor.
4. Battery chargers: The UC3846DWTR can be used in battery charging applications, providing efficient power conversion from an AC or DC source to a battery with a regulated charging voltage and current.
5. Inverters: The device can be used in inverter applications, such as uninterruptible power supplies (UPS) and solar inverters, to convert DC input power to an AC output with a regulated voltage and frequency.

Overall, the UC3846DWTR is a versatile and powerful PWM controller that can be used in a wide range of power conversion applications, providing efficient and reliable control of the output voltage and current.

UC3846DWTR Documents

Download datasheets and manufacturer documentation for UC3846DWTR

Datasheets :

UC1846/7, UC2846/7, UC3846/7      

HTML Datasheet :

UC1846/7, UC2846/7, UC3846/7