ON Semiconductor UC2843BD High Performance Current Mode Controller

The ON Semiconductor UC2843BD is a high-performance current mode pulse width modulator (PWM) controller that is designed for a wide range of power supply applications. This versatile integrated circuit (IC) is engineered to provide reliable and efficient control for switched-mode power supplies (SMPS), DC-DC converters, and other power conversion applications.

Key Features

• High-Frequency Operation: The UC2843BD operates at a frequency up to 500 kHz, which allows for smaller-sized components and a compact power supply design.
• Current Mode Control: Offers excellent output voltage regulation and a fast transient response due to the inherent nature of current mode control.
• Low Startup and Operating Current: The device features a low startup current of typically 0.5 mA and an operating current of typically 8.5 mA, contributing to higher efficiency in power supply designs.
• Trimmed Oscillator Discharge Current: Ensures precise duty cycle clamping, which can be critical for the protection and reliability of the power system.
• Adjustable Dead-Time: Provides the designer with the flexibility to optimize the power stage to achieve high efficiency.
• Under-Voltage Lockout (UVLO): Both the start-up and the operating voltage levels are programmable, ensuring the controller operates only when the supply voltage is sufficient.

Applications

The UC2843BD is suitable for a variety of applications, including:

• Offline and DC to DC converter power supplies
• Forward converters
• Boost converters
• Flyback converters
• Battery-operated devices

Quality and Reliability

ON Semiconductor is known for its commitment to quality, and the UC2843BD is no exception. It is designed to meet the stringent requirements of the industrial market, ensuring long-term reliability and performance. The device is available in a standard SOIC-8 package, making it easy to integrate into existing designs.

With its combination of features, the UC2843BD by ON Semiconductor is an ideal choice for designers looking to create efficient and compact power supply solutions.