ULN2003AIPW datasheet by Texas Instruments

ULN2003AIPW Frequently Asked Questions (FAQs)

• What is the maximum current that each output can sink?
  The ULN2003AIPW can sink up to 500mA per output, but it's recommended to limit it to 350mA for reliable operation.
• How do I protect the ULN2003AIPW from back-EMF when driving inductive loads?
  Use a flyback diode (e.g., 1N4001-1N4007) in parallel with the inductive load to absorb the back-EMF. This is especially important when driving relays, solenoids, or motors.
• What is the minimum input voltage required for the ULN2003AIPW to function properly?
  The ULN2003AIPW can operate with input voltages as low as 3.5V, but it's recommended to use a minimum of 4.5V for reliable operation.
• Can I use the ULN2003AIPW to drive LEDs?
  Yes, but be aware that the ULN2003AIPW is a Darlington transistor array, which has a higher voltage drop than a standard transistor. This may affect the brightness of the LEDs. Use a current-limiting resistor to prevent overheating.
• How do I calculate the power dissipation of the ULN2003AIPW?
  Use the formula: Pd = (Vin - Vout) x Iout x N, where Pd is the power dissipation, Vin is the input voltage, Vout is the output voltage, Iout is the output current, and N is the number of outputs. Ensure the total power dissipation does not exceed the maximum rating of 1.5W.