L5956PD datasheet by STMicroelectronics

L5956PD Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for the L5956PD to ensure optimal thermal performance?
  STMicroelectronics provides a recommended PCB layout in the application note AN4533, which includes guidelines for thermal vias, copper pours, and component placement to minimize thermal resistance and ensure reliable operation.
• How do I select the correct external components for the L5956PD, such as the bootstrap capacitor and the output inductor?
  STMicroelectronics provides a component selection guide in the datasheet, which includes formulas and guidelines for selecting the bootstrap capacitor, output inductor, and other external components based on the specific application requirements.
• What is the maximum allowed voltage on the VIN pin, and how do I protect the device from overvoltage conditions?
  The maximum allowed voltage on the VIN pin is 28V, and the device has an internal overvoltage protection (OVP) circuit that limits the input voltage to 30V. However, it is still recommended to add external overvoltage protection, such as a TVS diode or a voltage clamp, to ensure reliable operation and prevent damage to the device.
• How do I implement overcurrent protection (OCP) and short-circuit protection (SCP) using the L5956PD?
  The L5956PD has an internal OCP and SCP circuit that can be enabled by connecting the OCP pin to a resistor and a capacitor. The datasheet provides guidelines for selecting the OCP resistor and capacitor values based on the specific application requirements.
• What is the recommended operating frequency range for the L5956PD, and how does it affect the device's performance?
  The recommended operating frequency range for the L5956PD is 100 kHz to 500 kHz. Operating the device at higher frequencies can improve efficiency and reduce output voltage ripple, but it may also increase switching losses and electromagnetic interference (EMI).