VX7809-1000R - CUI Inc.

VX7809-1000R Frequently Asked Questions (FAQs)

• What is the recommended PCB layout and thermal management for optimal performance?
  CUI Inc recommends a PCB layout with a solid ground plane, minimal thermal resistance, and adequate clearance around the module. A thermal interface material (TIM) with a thermal conductivity of at least 1 W/m-K is recommended between the module and the heat sink. A heat sink with a thermal resistance of less than 5°C/W is also recommended.
• How do I ensure reliable start-up and shutdown of the module?
  To ensure reliable start-up and shutdown, CUI Inc recommends a soft-start circuit to limit the inrush current, and a slow turn-on and turn-off sequence to prevent voltage spikes and oscillations. Additionally, a minimum input capacitance of 10uF is recommended to ensure stable operation.
• What are the derating curves for the module's output power and efficiency at high temperatures?
  CUI Inc provides derating curves for output power and efficiency at high temperatures in the module's application note or technical note. Typically, the output power derates by 1.5% per °C above 50°C, and the efficiency derates by 0.5% per °C above 50°C.
• How do I protect the module from input voltage transients and surges?
  CUI Inc recommends using a TVS (Transient Voltage Suppressor) or a surge protector at the input to protect the module from voltage transients and surges. The TVS or surge protector should be rated for the maximum expected input voltage and surge energy.
• What is the recommended input filter configuration to minimize EMI and noise?
  CUI Inc recommends a pi-filter configuration with a common-mode choke, X-capacitors, and Y-capacitors to minimize EMI and noise. The filter components should be selected based on the module's input frequency and the system's EMI requirements.