The UC3843BVN is a high-performance, fixed frequency, current mode PWM controller from ON Semiconductor. It is specifically designed for Off-Line and DC to DC converter applications offering the designer a cost-effective solution with minimal external components.

Key Features

• Output Voltage: This device provides a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET.
• Performance: With a maximum duty cycle set at 100%, the UC3843BVN ensures robust and continuous operation. Its operating frequency can be set with a single external resistor, offering flexibility and precision in managing power supply specifications.
• Protection: The UC3843BVN comes with automatic feed forward compensation and pulse-by-pulse current limiting, enhancing the safety of your application. Additionally, it includes an under-voltage lockout with hysteresis, making it highly reliable in fluctuating power environments.
• Power Saving: Its low startup and operating current contribute to the efficiency of the overall power system, making it an energy-efficient choice for designers.

Applications

The UC3843BVN is versatile and can be used in a variety of applications, including:

• Switching power supplies
• Power converters
• Battery chargers
• Power supply for LED lighting
• DC-DC converters for distributed power systems
• Telecommunication equipment

Quality and Reliability

ON Semiconductor is known for its commitment to quality, and the UC3843BVN is no exception. It is designed to meet the stringent requirements of the industrial market. The device is available in a standard 8-pin DIP package, ensuring compatibility with a wide range of PCB designs and simplifying the integration process for product designers.

With its robust feature set and ON Semiconductor's reputation for quality, the UC3843BVN is an excellent choice for any power management solution requiring a high-performance PWM controller.