TL494IDR datasheet by Texas Instruments

TL494IDR Frequently Asked Questions (FAQs)

• What is the maximum voltage rating for the TL494IDR?
  The maximum voltage rating for the TL494IDR is 40V. However, it's recommended to operate within 30V to ensure reliable operation.
• How do I choose the right inductor value for my design?
  The inductor value depends on the output voltage, current, and switching frequency. A good starting point is to use the inductor selection guide in the datasheet or online tools like TI's Power Stage Designer.
• 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 SS to GND and adjust the value to set the soft-start time.
• How do I synchronize the TL494IDR with an external clock?
  Connect the external clock signal to the RT/CT pin and set the RT/CT pin high to enable synchronization. Ensure the clock frequency is within the recommended range (100 kHz to 500 kHz).
• What is the maximum duty cycle for the TL494IDR?
  The maximum duty cycle for the TL494IDR is 95%. However, it's recommended to operate within 80% to 90% duty cycle for reliable operation and to prevent over-voltage conditions.