UC2902DG4 datasheet by Texas Instruments

UC2902DG4 Frequently Asked Questions (FAQs)

• What is the recommended layout and PCB design considerations for the UC2902DG4?
  The UC2902DG4 is a high-frequency device, and proper PCB layout is crucial. Ensure a solid ground plane, keep traces short and wide, and use a low-ESR capacitor for the input filter. TI provides a recommended layout in the datasheet and application notes.
• How do I select the right input filter components for the UC2902DG4?
  Choose input filter components based on the input voltage range, output voltage, and desired ripple rejection. TI provides a filter design tool and guidelines in the datasheet and application notes. Consider using a pi-filter or a common-mode choke for improved EMI performance.
• What is the maximum output current capability of the UC2902DG4?
  The UC2902DG4 can deliver up to 2A of output current, but this depends on the input voltage, output voltage, and thermal considerations. Ensure proper heat sinking and thermal management to maintain reliability and prevent overheating.
• How do I implement overvoltage protection (OVP) and undervoltage protection (UVP) with the UC2902DG4?
  The UC2902DG4 has built-in OVP and UVP features. Connect the OVP pin to a voltage divider to set the overvoltage threshold, and use the UVP pin to monitor the input voltage. You can also add external circuitry for more advanced protection features.
• What is the purpose of the EN (enable) pin on the UC2902DG4, and how do I use it?
  The EN pin is used to enable or disable the converter. Tie the EN pin to VIN or a logic signal to enable the converter. Use a pull-down resistor to ensure the converter is disabled during power-up or when the EN pin is floating.