ON Semiconductor UC3845NG High-Performance Current Mode PWM Controller

The UC3845NG from ON Semiconductor is a high-performance, fixed frequency current mode controller that 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

• Trimmed Oscillator for Precise Frequency Control: The oscillator frequency is precisely trimmed to ensure accurate and stable frequency control over temperature and power supply variations.
• Automatic Feed Forward Compensation: This feature enhances the performance by compensating for varying input voltages without the need for external components.
• Pulse-by-Pulse Current Limiting: Provides effective protection against short circuits and overcurrent conditions by limiting the current in each cycle.
• Enhanced Load Response Characteristics: The UC3845NG has excellent load response characteristics, making it ideal for applications that demand quick response to load changes.
• Under-Voltage Lockout with Hysteresis: The device includes an under-voltage lockout feature with built-in hysteresis to prevent the system from operating at insufficient voltages.
• Double Pulse Suppression: High frequency noise immunity and double pulse suppression ensure stable operation under varying conditions.

Applications

The UC3845NG is versatile and can be used in a variety of applications including:

• Switching power supplies
• Power converters
• DC-DC converters
• Battery chargers
• LED drivers
• Telecommunication equipment

Product Specifications

The UC3845NG operates with a supply voltage range of 12V to 25V and features a 500kHz operating frequency. The package type is PDIP-8, which is suitable for through-hole mounting, making it easy to integrate into a wide range of circuit boards.

With its robust design and comprehensive features, the UC3845NG is an excellent choice for engineers looking to implement a reliable PWM solution in their power management designs. ON Semiconductor's commitment to quality ensures that the UC3845NG delivers consistent performance and durability for a wide array of electronic applications.