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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Home Questions Tags Users Unanswered. In the circuit consider the LED to be the loads and the logic pins blue colour as the pins connected to the Digital circuit or Microcontroller like Arduino.

Articles which use infobox templates with no data rows Commons category link is on Wikidata. Even further, stacking one chip on top of another, both electrically and physically, has been done. SPI Module of Arduino. Input 1 to Input 7.

While I can imagine you can increase current I’m not sure you can presume the current is always evenly distributed between the two outputs.

With the ULN inputs floating the outputs should be pulled up by the stepper coils. A darlington pair is an arrangement of two bipolar transistors. Arduino based GPS receiver.


The ULN can only sink ma as you stated. Used as test pin or Voltage suppresser pin optional to use.

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

It features common-cathode flyback diodes for switching inductive loads. It will not handle the ma required by the motor. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. Common free wheeling diodes.

In other projects Wikimedia Commons. This high-density System-in-Package SiP integrates controller, power switches, and support components.

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. Wikimedia Commons has kc related to ULN What is wrong here?

Wouter van Ooijen By using our site, you acknowledge that you have read and understand our Ulnn2003a PolicyPrivacy Policyand our Terms of Service. ULN is also commonly used while driving Stepper Motors.

So if you have anything that anything more than 5V 80mA to work, then this IC would be the right choice for you.


Output for 1 st channel. I haven’t connected the motor yet. The ULN is known for its high-current, high-voltage capacity. The resultant current gain is the product of those of the two component transistors:.

The seven Darlington pairs in ULN can operate independently except the common cathode diodes that connect to their respective collectors.

IC – ULNA India

You can try that manually by energising the coils in the appropriate sequence. Inside the ULN there are darlington transistors with an open collector, so without some external circuit the output will not be pulled up to some higher voltage. Output lc 2 nd channel. Input for 5 th channel.

It contains seven open collector darlington pairs with common emitters. Output 1 to Output 7. Input for 2 nd channel.

I want to drive a stepper motor with this ulna IC. Unl2003a do I give supply to the stepper motor? Views Read Edit View history.

How do you have the outputs connected?