UC3843 -Current Mode PWM Controller

UC3843 Current Mode PWM Controller IC

The UC3843 is a high-performance current-mode PWM controller, specifically designed for efficient Off-Line and DC-to-DC converter applications. This integrated circuit features a trimmed oscillator for precise duty cycle control. It also includes a temperature-compensated reference and a high-gain error amplifier. A robust current sensing comparator ensures stable operation. Its high-current totempole output is perfect for driving Power MOSFETs. This controller minimizes external component count, simplifying design. Enjoy reliable performance with features like low start-up current and UVLO with hysteresis. It supports operating frequencies up to 500kHz, offering flexibility for various power supply designs. The UC3843 provides a comprehensive solution for modern power management.

Specifications:

• Controller Type: Current-Mode PWM
• Operating Frequency: Up to 500 kHz
• Start-Up Current: Low
• Duty Cycle Control: Trimmed Oscillator, Precise
• Output Drive: High Current Totempole
• Protection Features: UVLO with Hysteresis, Maximum Duty Clamp
• Internal Reference: Temperature Compensated
• Error Amplifier: High Gain

Key features and benefits:

• Fixed Frequency Current-Mode PWM Control
• Optimized for Off-Line and DC-to-DC Converters
• Precise Duty Cycle Control with Trimmed Oscillator
• Low Start-Up Current for Efficient Operation
• UVLO (Under-Voltage Lockout) with Hysteresis
• High Current Totempole Output for Power MOSFETs
• Integrated Current Sensing Comparator

Applications:

• Switch-Mode Power Supplies (SMPS)
• DC-DC Converters
• Offline Power Converters
• Battery Chargers
• LED Lighting Power Supplies

Package Includes:

*Image shown is a representation only.

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