Description. The ULN, ULN, ULN and ULN . for ULN, VCE = 2 V,. IC = mA. CI. Input capacitance. pF. The ULNA, ULNA and ULNA are high voltage, high current Darlington arrays each . On State Input Voltage. 6. VCE = 2V, IC = mA. —. —. The IC ULNA is a Darlington transistor array which deals with high-voltage and high-current. There are various types of relay driver ICs.

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ULNA – Wikipedia

Interface SD Card with Arduino. I want to drive a stepper motor with this ulna IC. How do you have the outputs connected?

Output for 4 th channel. Respective outputs of seven input pins. Typical usage of the ULNA is in driver circuits for relayslamp and LED displaysstepper motors, logic buffers and line drivers.

IC – ULN2003A (High Voltage & Current Darlington Transistor Arrays)

Ground Reference Voltage 0V. Output for iv rd channel. Interface GPS with Arduino. The seven Darlington pairs in ULN can operate independently except the common cathode diodes that connect to their respective collectors.


It features common-cathode flyback diodes for switching inductive loads. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of uln2003zprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

How do I give supply to the stepper motor? Choosing Battery for Robots. Output for 7 th channel. The COM pin is connected to a freewheeling diode for each transistor, so you can connect it to the positive rail to protect against overvoltage, for example uon2003a inductive loads.

It contains seven open collector darlington pairs with common emitters. However you can run higher current loads buy combining two or more output ulm2003a to gather.

Common free wheeling diodes. This page was last edited on 10 Februaryat Input 1 to Input 7. The resistor is within the chip. If not remove the ULN. Got the grounds of the 2 supplies connected together?

If you post a schematic it would be helpfull. Notice that the Positive pin of the LED is connected to the positive load voltage and the negative pin is connected to the output pin of the IC. See the data sheet for the current curve plot showing duty cycle with current vs number of drivers on. Output for 1 st channel.


It will probably work, but I would not trust it in a serious product. Is kc safe to drive the motor at 9V with ULNa?

Start with the stepper and the ULNA. So if you have anything that anything more than 5V 80mA to uln203a, then this IC would be the right choice for you. Generally it can also be used for interfacing with a stepper motorwhere the motor requires high ratings which cannot be provided by other interfacing devices.

So when the negative terminal of the LED is grounded it completes the circuit and thus glows. Retrieved from ” https: