UCC2917D datasheet by Texas Instruments

UCC2917D Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for the UCC2917D to minimize EMI and noise?
  Texas Instruments recommends a 4-layer PCB with a solid ground plane, and to keep the input and output traces as short as possible. Additionally, it's recommended to use a common mode choke and a shielded cable for the output to minimize EMI.
• How do I ensure the UCC2917D is operating within its safe operating area (SOA) during startup and shutdown?
  To ensure the UCC2917D operates within its SOA, it's recommended to use a soft-start circuit to limit the inrush current during startup, and to use a voltage supervisor to monitor the input voltage and prevent the device from operating outside its specified range during shutdown.
• What is the maximum allowed voltage drop across the sense resistor (Rs) in the UCC2917D?
  The maximum allowed voltage drop across the sense resistor (Rs) is 1V. Exceeding this voltage drop can cause the device to malfunction or enter an overcurrent condition.
• Can I use the UCC2917D in a high-temperature environment, and if so, what are the derating factors?
  Yes, the UCC2917D can be used in high-temperature environments, but it's recommended to derate the device's power rating according to the temperature derating curve provided in the datasheet. For example, at 125°C, the device's power rating is derated to 50% of its maximum rating.
• How do I troubleshoot the UCC2917D if it's not functioning as expected?
  To troubleshoot the UCC2917D, start by verifying the input voltage and current, and then check the output voltage and current. Use an oscilloscope to check for any unusual waveforms or oscillations. Also, check the device's thermal performance and ensure it's operating within its specified temperature range.