TL494IDRG4 datasheet by Texas Instruments

TL494IDRG4 Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the TL494IDRG4?
  The maximum operating frequency of the TL494IDRG4 is 300 kHz. However, it's recommended to operate it at a frequency below 100 kHz for optimal performance and to minimize electromagnetic interference (EMI).
• How do I ensure stable operation of the TL494IDRG4 in my design?
  To ensure stable operation, make sure to decouple the power supply pins (VCC and GND) with a 10uF capacitor, and use a 1kΩ to 10kΩ resistor in series with the output pin (OUT) to prevent oscillations. Additionally, ensure that the input voltage (VIN) is within the recommended range of 7V to 40V.
• What is the purpose of the dead-time control (DTC) pin on the TL494IDRG4?
  The dead-time control (DTC) pin is used to adjust the dead time between the turn-on and turn-off of the power switches in a push-pull converter. This helps to prevent shoot-through currents and reduce electromagnetic interference (EMI).
• Can I use the TL494IDRG4 in a synchronous rectifier configuration?
  Yes, the TL494IDRG4 can be used in a synchronous rectifier configuration. However, it's essential to ensure that the synchronous rectifier switch is properly synchronized with the main power switch to prevent shoot-through currents and reduce losses.
• How do I calculate the minimum and maximum duty cycles for the TL494IDRG4?
  The minimum duty cycle is typically around 5% to 10%, while the maximum duty cycle is around 90% to 95%. The exact values depend on the specific application and the desired output voltage. You can use the following formula to calculate the duty cycle: Duty Cycle = (Ton / (Ton + Toff)), where Ton is the on-time and Toff is the off-time.