TI recommends a compact layout with the controller, power stage, and feedback components placed close together. Keep the high-current paths short and use a solid ground plane to reduce EMI. Place the input and output capacitors close to the IC and use a Kelvin connection for the sense resistors.
Use the TI-provided compensation calculator or consult the application note SLUA121 for guidance on selecting the correct compensation components. The calculator takes into account the specific application's requirements, such as output voltage, current, and switching frequency.
The maximum allowed voltage on the VCC pin is 15V. To protect it from overvoltage, use a voltage regulator or a zener diode clamp to limit the voltage to 15V or less. Additionally, ensure that the input voltage to the regulator or clamp is properly filtered to prevent noise and transients from damaging the IC.
Use a low-value, high-precision sense resistor (e.g., 1% or better) and place it close to the IC. Ensure that the sense resistor is properly decoupled from the power stage and that the sense lines are shielded from noise. Also, consider using a Kelvin connection for the sense resistors to reduce errors.
The recommended operating temperature range for the UC3823ADWTR is -40°C to 85°C. To ensure reliable operation over temperature, use a thermally-conductive package, ensure good airflow, and consider using thermal interface materials. Also, derate the IC's power dissipation according to the temperature derating curve provided in the datasheet.
UC3823ADWTR datasheet
by Texas Instruments
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