BD679 datasheet by STMicroelectronics

BD679 Frequently Asked Questions (FAQs)

• What is the maximum operating temperature range for the BD679?
  The BD679 can operate safely between -40°C to 150°C, but the recommended operating temperature range is -20°C to 125°C for optimal performance.
• How do I ensure the BD679 is properly biased for optimal performance?
  To ensure proper biasing, make sure to provide a stable voltage supply, and set the base-emitter voltage (VBE) between 0.6V to 0.8V. Also, ensure the collector-emitter voltage (VCE) is within the recommended range of 1V to 50V.
• What is the maximum current handling capacity of the BD679?
  The BD679 can handle a maximum collector current (IC) of 500mA per transistor, and a total current of 1.5A for the entire array.
• How do I protect the BD679 from overheating?
  To prevent overheating, ensure good heat dissipation by using a heat sink, and keep the junction temperature (TJ) below 150°C. Also, avoid exceeding the maximum power dissipation (PD) of 1.5W per transistor.
• Can I use the BD679 as a switch?
  Yes, the BD679 can be used as a switch, but it's essential to ensure the transistor is fully saturated (VCE(sat) < 0.5V) to minimize power losses. Also, consider the switching frequency and ensure it's within the recommended range.