UC3845 Current Mode PWM Controller SMD IC

UC3845 Current Mode PWM Controller SMD IC

The UC3845 is a current-mode controller optimized for high-frequency switching and provides better performance in energy conversion efficiency. It is typically used in isolated flyback, forward, and boost converters. The device operates in a fixed frequency with duty cycle adjustments through current feedback.

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• Current-Mode Control: Simplifies control loop design and improves transient response

• High Frequency Operation: Supports high-frequency switching applications

• UVLO with Hysteresis: Ensures reliable startup and shutdown

• Soft Start Functionality: Protects the system during power-up

• Thermal Stability: Designed for reliable operation in high-temperature environments

Specifications of UC3845 Current Mode PWM Controller SMD IC

• Input Voltage Range: Typically 7V to 30V

• Operating Frequency: Adjustable, up to 500 kHz

• Output Voltage: Drives power MOSFET gates directly

• Under-Voltage Lockout: Turn-on Threshold-16V & Turn-off Threshold-10V

• Current Sense Threshold: 1V

• Power Consumption: Low standby current of approximately 1 mA

Applications of UC3845 Current Mode PWM Controller SMD IC

• Switch-Mode Power Supplies

• DC-DC Converters

• Battery Chargers

• Industrial Power Equipment

• LED Drivers

Package Includes

      1 x UC3845 Current Mode PWM Controller SMD IC