onsemi

UC3845BD1

UC3845BD1 Description

The UC3845BD1 is a high-performance, single-output, high-voltage, current-mode, pulse-width modulator (PWM) controller designed for off-line and DC-to-DC converters. It is manufactured by onsemi, a leading supplier of semiconductor solutions. The UC3845BD1 operates with a supply voltage range of 7.6V to 30V and is capable of switching frequencies up to 500kHz, making it suitable for a wide range of applications. Despite being classified as obsolete, the UC3845BD1 remains a popular choice due to its reliable performance and cost-effectiveness.

UC3845BD1 Features

• Output Type: Transistor Driver with positive output configuration and isolation capability.
• Product Status: Obsolete, but still widely used due to its proven performance.
• Frequency - Switching: Up to 500kHz, providing efficient power conversion.
• REACH Status: REACH Unaffected, ensuring compliance with European chemical regulations.
• Voltage - Supply (Vcc/Vdd): 7.6V to 30V, offering flexibility in power supply design.
• Moisture Sensitivity Level (MSL): 1 (Unlimited), indicating no sensitivity to moisture.
• Operating Temperature: 0°C to 70°C (TA), suitable for a variety of environmental conditions.
• Synchronous Rectifier: No, simplifying the design process.
• ECCN: EAR99, indicating export control classification.
• Topology: Boost and Flyback, providing versatility in power conversion applications.
• Mounting Type: Surface Mount, facilitating integration into PCB designs.
• Clock Sync: No, allowing for independent operation.
• Number of Outputs: 1, simplifying the design for single-output applications.
• Control Features: Frequency Control, enabling precise regulation of output voltage.
• Duty Cycle (Max): 48%, ensuring efficient power conversion.
• Output Phases: 1, suitable for single-phase applications.
• Package: Tube, providing protection during shipping and handling.

UC3845BD1 Applications

The UC3845BD1 is ideal for a variety of applications, including:

1. DC-to-DC Converters: Its high-voltage and high-frequency capabilities make it suitable for powering electronic devices.
2. Off-Line Power Supplies: The UC3845BD1 can be used in power supplies for home appliances and industrial equipment.
3. Telecommunications Equipment: Its reliable performance and wide operating temperature range make it suitable for use in telecommunications infrastructure.
4. Automotive Electronics: The UC3845BD1 can be used in power converters for automotive applications, such as infotainment systems and power management.

Conclusion of UC3845BD1

Despite being classified as obsolete, the UC3845BD1 remains a popular choice for its reliable performance, cost-effectiveness, and versatility in a wide range of applications. Its high-voltage and high-frequency capabilities, combined with its ability to operate in various environmental conditions, make it an ideal choice for designers looking for a proven solution in power conversion. While newer models may offer additional features and improved performance, the UC3845BD1 continues to be a valuable option for those seeking a reliable and cost-effective solution.