UC2846DW datasheet by Texas Instruments

UC2846DW Frequently Asked Questions (FAQs)

• What is the recommended input voltage range for the UC2846DW?
  The recommended input voltage range for the UC2846DW is 12V to 35V, although it can operate up to 40V with reduced performance.
• How do I choose the right inductor value for my design?
  The inductor value depends on the output voltage, output current, and switching frequency. A good starting point is to use the inductor value calculation formula provided in the datasheet, and then adjust based on the specific design requirements.
• What is the purpose of the soft-start pin (SS) and how do I use it?
  The soft-start pin (SS) is used to slowly ramp up the output voltage during startup to prevent inrush currents. Connect a capacitor from the SS pin to ground, and the IC will slowly charge the capacitor to control the output voltage rise time.
• How do I compensate for the voltage drop across the catch diode (D1) in my design?
  The voltage drop across the catch diode (D1) can be compensated for by adding a Schottky diode in series with the output capacitor, or by using a diode with a lower forward voltage drop.
• What is the maximum output current capability of the UC2846DW?
  The maximum output current capability of the UC2846DW is 3A, but this can be limited by the thermal performance of the package and the design of the output stage.