Part Number: ULN2004A We use the ULN2004AN (DIP) as a relay driver, in automotive application, so that the working voltages never exceed 14V / 15V, we attach the electrical circuit of the application, which we have been manufacturing for years. You may…
Other Parts Discussed in Thread: ULN2004A Hi
My customer is using ULN2004A.
Could you let me know hFE value of FET in ULN2004A at "0C, 20C and 40C" ?
Best regards,
Shimizu
Hi Maverick,
This input voltage is defined for the input pins namely 1B to 8B.
A 3.3V to 5V input will sufficiently turn on and turn off the device even when the input collector emitter voltage is up to its Abs max (50V).
It should not change based…
Hello Andy, I see the similar circuits you found on the web. TI's archives do no yield any 30VAC output designs to fit your need. What frequency and current are you needing to drive the UV LED? 10W with input voltage of 12Vdc and output of 30V/0…
No, the controller and motor use a different power supply.
I suspected the same problem and isolated the motor from the controller. The output from the controller is connected to a optocoupler (4N35), the output of the optocoupler is connected to an…
Hello Mohamed,
The ULN2004A won't necessarily help directly with keeping the motor from getting warm, assuming you are running it all the time, but it will help to decrease overall power consumption because the voltage drop is less than it is for the…
Part Number: OPA134 Other Parts Discussed in Thread: LM386 , , ULN2004A , ULN2002A , ULN2003A , LM4871 I am creating a device that vibrates the 6 strings of a guitar. Let me explain what I have working, then let me explain why I need something better. From…
Masami san,
I believe Micheal did not notice that the reverse connect is due to mistake, not normal operation.
The diode in question will see less than 140mA of current which will not damage the device . The relay contacts will be engaged of course. …
Hello,
Unfortunately the complete text of my query was not uploaded in my previous post of same subject. so I am re-posting my question.
My application requires to drive 3 inductive load of 40 mA and I have chosen the part ULN2003A to drive the load."COM…
