BQ29312APW datasheet by Texas Instruments

BQ29312APW Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for the BQ29312APW to ensure optimal performance?
  A 4-layer PCB with a solid ground plane and a separate power plane is recommended. The device should be placed near the battery, and the power traces should be wide and short to minimize resistance and inductance.
• How do I select the right sense resistor value for the BQ29312APW?
  The sense resistor value depends on the maximum current and voltage of the system. A good starting point is to use the formula Rsense = 0.1V / Imax, where Imax is the maximum current. The sense resistor should be placed close to the device and have a low temperature coefficient.
• What is the purpose of the EN pin on the BQ29312APW, and how do I use it?
  The EN pin is an active-high enable input that allows the device to be turned on and off. It can be connected to a logic signal or a switch to control the device's operation. When EN is high, the device is enabled, and when EN is low, the device is disabled.
• How do I protect the BQ29312APW from overvoltage and undervoltage conditions?
  The BQ29312APW has built-in overvoltage protection (OVP) and undervoltage protection (UVP) features. However, additional protection can be added using external components such as zener diodes or voltage supervisors to provide extra protection against voltage transients and faults.
• What is the thermal derating curve for the BQ29312APW, and how do I use it?
  The thermal derating curve is provided in the datasheet and shows the maximum power dissipation of the device versus temperature. To use it, determine the maximum ambient temperature of the system and the maximum power dissipation required, and then use the curve to determine the maximum current that the device can handle.