PT4101C datasheet by Texas Instruments

PT4101C Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance of the PT4101C?
  Texas Instruments provides a recommended PCB layout in the PT4101C evaluation module documentation, which includes guidelines for component placement, trace routing, and thermal management to ensure optimal performance and minimize electromagnetic interference (EMI).
• How do I ensure the PT4101C is properly thermally managed?
  The PT4101C has a thermal pad that must be connected to a thermal plane on the PCB to dissipate heat. Ensure the thermal plane is connected to a heat sink or a large copper area on the PCB, and use thermal interface material (TIM) to fill any gaps between the device and the heat sink.
• What is the maximum input voltage that the PT4101C can handle?
  While the datasheet specifies a maximum input voltage of 18V, the PT4101C can handle input transients up to 22V for short durations (less than 100ms). However, it's recommended to use input voltage protection circuitry to prevent damage from voltage spikes or surges.
• How do I adjust the output voltage of the PT4101C?
  The output voltage of the PT4101C can be adjusted by changing the value of the feedback resistors (RFBT and RFBG) or by using an external voltage reference. The datasheet provides a formula to calculate the required resistor values for a specific output voltage.
• What is the minimum input capacitance required for stable operation of the PT4101C?
  The PT4101C requires a minimum input capacitance of 10uF to ensure stable operation. However, it's recommended to use a larger input capacitor (22uF or more) to improve input ripple rejection and reduce output voltage noise.