PT6921C datasheet by Texas Instruments

PT6921C Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal thermal performance?
  TI recommends a 2-layer PCB with a solid ground plane on the bottom layer and a thermal relief pattern on the top layer to minimize thermal resistance. A minimum of 2 oz copper thickness is recommended.
• How do I ensure reliable operation at high temperatures?
  Ensure proper heat sinking, use a thermal interface material (TIM) with a thermal conductivity of at least 1 W/m-K, and follow the recommended PCB layout. Also, consider derating the output current at high temperatures.
• What is the maximum allowed voltage on the enable pin (EN)?
  The maximum allowed voltage on the enable pin (EN) is 6 V. Exceeding this voltage may damage the device.
• Can I use the PT6921C in a high-reliability or automotive application?
  Yes, the PT6921C is qualified for automotive and high-reliability applications. It meets the AEC-Q100 standard and is designed to operate in harsh environments.
• How do I calculate the output voltage ripple?
  The output voltage ripple can be calculated using the formula: ΔVout = (Iout * ESL) / (Cout * fsw), where ESL is the equivalent series inductance of the output capacitor, Cout is the output capacitance, and fsw is the switching frequency.