UC3842BD1013TR datasheet by STMicroelectronics

UC3842BD1013TR Frequently Asked Questions (FAQs)

• What is the recommended operating voltage range for the UC3842BD1013TR?
  The recommended operating voltage range for the UC3842BD1013TR is 12V to 28V, with a maximum rating of 30V.
• How do I ensure stable operation of the UC3842BD1013TR in my design?
  To ensure stable operation, ensure that the input voltage is within the recommended range, decouple the power supply with a 10uF capacitor, and use a minimum of 1nF capacitor on the Vref pin.
• What is the maximum switching frequency of the UC3842BD1013TR?
  The maximum switching frequency of the UC3842BD1013TR is 500kHz, but it can be adjusted using the RT/CT pin.
• How do I calculate the output voltage of the UC3842BD1013TR?
  The output voltage of the UC3842BD1013TR can be calculated using the formula: Vout = Vref x (1 + R1/R2), where Vref is the internal reference voltage (5V), R1 is the upper resistor, and R2 is the lower resistor.
• What is the purpose of the soft-start pin (SS) on the UC3842BD1013TR?
  The soft-start pin (SS) is used to slowly ramp up the output voltage during startup, reducing inrush current and preventing voltage overshoots.