ULN2066B datasheet by STMicroelectronics

ULN2066B Frequently Asked Questions (FAQs)

• What is the maximum current that each output can handle?
  The maximum current that each output can handle is 500mA, but it's recommended to keep it below 350mA for reliable operation.
• How do I protect the ULN2066B from back-EMF when driving inductive loads?
  You can add a flyback diode (e.g., 1N4007) in parallel with the inductive load to protect the ULN2066B from back-EMF.
• What is the minimum input voltage required for the ULN2066B to function properly?
  The minimum input voltage required is 3.5V, but it's recommended to use a minimum of 4.5V for reliable operation.
• Can I use the ULN2066B to drive a relay?
  Yes, the ULN2066B can be used to drive a relay, but make sure to choose a relay with a coil voltage and current rating that matches the ULN2066B's output capabilities.
• How do I calculate the power dissipation of the ULN2066B?
  You can calculate the power dissipation using the formula: Pd = (Vin - Vout) x Iout, where Vin is the input voltage, Vout is the output voltage, and Iout is the output current.