UC2903Q datasheet by Texas Instruments

UC2903Q Frequently Asked Questions (FAQs)

• What is the recommended operating voltage range for the UC2903Q?
  The recommended operating voltage range for the UC2903Q is 10.5V to 15V, although it can operate up to 18V with reduced performance.
• How do I ensure the UC2903Q is properly biased for optimal performance?
  To ensure proper biasing, connect a 1kΩ resistor between the VCC pin and the VIN pin, and a 2.2kΩ resistor between the VIN pin and ground. This sets the internal voltage regulator to 12V.
• What is the purpose of the EN (Enable) pin, and how do I use it?
  The EN pin is an active-low input that enables or disables the UC2903Q. Connect it to ground to enable the device, or to VCC to disable it. Use a pull-up resistor to ensure the pin is not left floating.
• How do I choose the correct value for the output capacitor (CO) in the UC2903Q?
  Choose a capacitor with a value between 10uF to 100uF, depending on the output voltage and current requirements. A larger capacitor value reduces output ripple but increases startup time.
• What is the maximum output current capability of the UC2903Q?
  The UC2903Q can deliver up to 3A of output current, but this may vary depending on the input voltage, output voltage, and thermal conditions.