A6986FTR - STMicroelectronics

A6986FTR Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal thermal performance?
  STMicroelectronics provides a recommended PCB layout in the application note AN4921, 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 input capacitor for the A6986FTR?
  The input capacitor selection depends on the input voltage, current, and ripple requirements. A general guideline is to choose a capacitor with a voltage rating of at least 1.5 times the maximum input voltage, and a capacitance value that ensures the ripple voltage is within the recommended range (typically 10-50 μF).
• What is the maximum allowed voltage drop across the sense resistors?
  The maximum allowed voltage drop across the sense resistors is typically 100 mV to ensure accurate current sensing. Exceeding this value may lead to inaccurate current measurements and affect the device's performance.
• How do I implement overcurrent protection with the A6986FTR?
  The A6986FTR has a built-in overcurrent protection feature that can be enabled by connecting the OCP pin to a resistor divider network. The resistor values should be chosen to set the desired overcurrent threshold, and the OCP pin should be connected to a voltage source (e.g., VCC) to enable the protection feature.
• What is the purpose of the EN pin, and how do I use it?
  The EN (enable) pin is used to enable or disable the A6986FTR. When the EN pin is high, the device is enabled, and when it's low, the device is disabled. This pin can be used to implement power sequencing, shutdown, or low-power modes in the system.