ULN2003AIN datasheet by Texas Instruments

ULN2003AIN Frequently Asked Questions (FAQs)

• What is the maximum current that each output can sink?
  The ULN2003AIN can sink up to 500mA per output, but it's recommended to limit it to 350mA for reliable operation.
• How do I calculate the power dissipation of the ULN2003AIN?
  You can calculate the power dissipation using the formula: Pd = Σ(Io x Vo) + (Vin x Iin), where Io is the output current, Vo is the output voltage, Vin is the input voltage, and Iin is the input current.
• What is the minimum input voltage required for the ULN2003AIN to function properly?
  The minimum input voltage required is 4.5V, but it's recommended to use a minimum of 5V for reliable operation.
• Can I use the ULN2003AIN as a relay driver?
  Yes, the ULN2003AIN can be used as a relay driver, but you need to ensure that the relay coil current is within the output current rating of the ULN2003AIN.
• How do I protect the ULN2003AIN from back-EMF when driving inductive loads?
  You can use a flyback diode (e.g., 1N4007) in parallel with the inductive load to protect the ULN2003AIN from back-EMF.