STMicroelectronics provides a recommended PCB layout in the application note AN4899, which includes guidelines for component placement, thermal management, and routing to minimize electromagnetic interference (EMI) and ensure reliable operation.
The input capacitor selection depends on the input voltage, frequency, and ripple current. A general guideline is to choose a capacitor with a capacitance value between 10uF to 100uF, a voltage rating of at least 2x the input voltage, and a low ESR (Equivalent Series Resistance) to minimize voltage drops and ensure stable operation.
The maximum allowed voltage drop across the VNQ810M-E's internal resistance is typically around 1.5V to 2V, depending on the specific application and operating conditions. Exceeding this voltage drop may lead to reduced performance, increased power dissipation, or even device damage.
Proper thermal management is crucial for the VNQ810M-E. Ensure good airflow around the device, use a heat sink or thermal pad if necessary, and follow the recommended PCB layout guidelines. Monitor the device's temperature and adjust the operating conditions or thermal design as needed to prevent overheating.
To minimize EMI, use a pi-filter or LC-filter at the input, ensure proper grounding and shielding of the PCB, and keep sensitive components away from the VNQ810M-E. Additionally, use a shielded enclosure or metal casing to contain EMI radiation and prevent interference with other devices.
VNQ810M-E datasheet
by STMicroelectronics
