uC3843 ,Current Mode PWM Controller - SOIC-8, 30V, 0.5mA Start-up Current

The UC3843 is a highly efficient current-mode PWM controller designed for off-line and DC-to-DC converter applications. It features a low start-up current of less than 1mA, making it ideal for energy-efficient designs. This controller ensures stable operation with automatic feed-forward compensation and includes pulse-by-pulse current limiting for enhanced protection.

Its 500kHz operation frequency allows for high-speed switching, making it suitable for high-performance power supplies. The controller is housed in an 8-pin SOIC package, providing a compact and reliable solution for modern power management systems.

Key Features :

• Optimized for Off-line and DC-to-DC Converters: Provides efficient current-mode control for DC-DC converter applications.
• Low Start-Up Current: Draws less than 1mA at start-up for reduced energy consumption.
• Automatic Feed Forward Compensation: Ensures stable operation across varying input voltage conditions.
• Pulse-by-Pulse Current Limiting: Provides overcurrent protection by limiting the current for each pulse.
• Under-Voltage Lockout (UVLO): Ensures that the controller only operates when the supply voltage exceeds a set threshold.
• SOIC-8 Package: Compact surface mount design suited for space-sensitive applications.