VXO7803-500 - CUI Inc.

VXO7803-500 Frequently Asked Questions (FAQs)

• What is the recommended PCB layout and thermal management for optimal performance?
  CUI recommends a 4-layer PCB with a solid ground plane, and thermal vias under the device to dissipate heat. A minimum of 1 oz copper thickness is recommended. For thermal management, a heat sink or thermal pad can be used to keep the junction temperature below 125°C.
• How do I ensure the output voltage is within the specified tolerance?
  To ensure the output voltage is within the specified tolerance, it's essential to use the recommended input voltage range, and to decouple the input and output with suitable capacitors. Additionally, the output voltage can be trimmed using the VTRIM pin.
• What is the maximum capacitive load that can be driven by the VXO7803-500?
  The VXO7803-500 can drive a maximum capacitive load of 10,000 pF. Exceeding this limit may cause instability or oscillations. It's essential to consider the output capacitance and ESR when designing the power supply.
• How do I protect the device from overcurrent and short-circuit conditions?
  The VXO7803-500 has built-in overcurrent protection (OCP) and short-circuit protection (SCP). However, it's recommended to add external fuses or circuit breakers to protect the device and the system from overcurrent and short-circuit conditions.
• What is the recommended input filter to reduce electromagnetic interference (EMI)?
  CUI recommends using a pi-filter (L-C-L) or a common-mode choke at the input to reduce electromagnetic interference (EMI). The filter components should be selected based on the specific application and frequency range.