The UC3843ADM is an integrated circuit (IC) component widely used in power supply applications. It is a current-mode PWM (Pulse Width Modulation) controller designed to regulate the output voltage of a power supply by controlling the duty cycle of the switching transistor. Here's an overview of its key features:
1. Current-mode Control: The UC3843ADM utilizes a current-feedback control mechanism in which the voltage across a sensing resistor is compared to an internal reference. This helps in maintaining a stable and reliable output voltage by regulating the current flow.
2. Wide Voltage Range: It can operate over a wide input voltage range, typically from 8V to 36V, making it suitable for various applications requiring different supply voltage levels.
3. Adjustable Output Frequency: The IC enables the user to adjust the switching frequency of the power supply circuit according to the specific requirements of the application. This flexibility allows for optimization of efficiency and reduction of electromagnetic interference (EMI).
4. Pulse-by-Pulse Current Limiting: The UC3843ADM incorporates a pulse-by-pulse current limiting feature that provides protection against excessive load current. It ensures that the current through the switching transistor does not exceed the specified threshold, preventing damage to the IC and connected components.
5. Soft-Start Function: To reduce the inrush current during startup, the UC3843ADM includes a soft-start circuit that gradually increases the duty cycle
