The UTC ULN are high-voltage, high-current darlington drivers comprised of seven NPN darlingto pairs. All units feature integral clamp diodes for switching. DESCRIPTION. The ULNA, ULNA, ULN and. ULNA are high voltage, high current darlington arrays each containing seven open collector. The ULxxA devices are high-voltage, high-current Darlington transistor arrays . Each consists of seven NPN Darlington pairs that feature high-voltage outputs.

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If you continue to use this site, let’s assume that you agree. Any darlington transistor needs more input current for it to produce more output current. Smart Home and City Smart Industry. Originally Posted by Vbase.

The data is confusing and that is why you got it the other way around. Product is in design feasibility stage. In order to have more input current then the input voltage obviously must be higher as is shown. It will remain in our system until you withdraw your consent.

Indicator Circuit water level using the ULN

The “On state Input Voltage” is the minimum input voltage you must give it for it to produce the output current shown at the saturation voltage shown 2V.

Last edited by Vbase; 13th May at Please contact our sales support for information on specific devices. The time now is Sign in Register Email. That means that if you go below 5V and collector current mA the collector voltage will be more than 2V because the transistor starved of base current.


You are not reading the data properly.

Texas Instruments

The operation is simple, and increasing the level of water in the tank, water comes into contact with the ends P1 to P7 and so, cause the pins 7 LEDs light up their channels in sequence.

Very Good Average Fair Poor. Buy Direct Add ul2004 cart. Even though its working for 24V input voltage, I’m afraid to go with this design for long run.

I think the datasheets wrongly say “maximum” instead of “minimum” input voltage needed. Drive a 24V W 7. No need uln200 resistor to ground and don’t use zeners. Please do not PM me with technical questions, use the Forums. Password Forgot your password? Originally Posted by Audioguru. Media Subscription Media Contacts.

ULN – Seven Darlington Arrays – STMicroelectronics

No commitment taken to produce Proposal: Part and Inventory Search. That is the reasonI want to know what value exactly I need to add at the input for given 24V input? Responsibility Site – Privacy Policy.

Marketing proposal for customer feedback. If you believe that your personal data has been misused, you have the right to lodge a complaint with a supervisory authority. Changing a V capacitor in Cisco switch power adapter These versatile devices are useful for driving a wide range of loads including solenoids, relay DC motors, LED display filament lamps, thermal printheads and high-power buffers. Bolts Nuts Washer Standoff Spacers. Resources Technical Documentation Product Specifications.

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Orders Hln2004 list Track my order s. SPI verilog testbench code 6. Contacts Learning Longevity Commitment. Menu Products Explore our product portfolio. Product is in design stage Target: Each channel can have a working stream mA and withstand surges of mA. How to drive 5V,mA from 24V,2. Suppression diodes are included for inductive load driving and the inputs are pinned opposite the outputs to simplify board layout.


Often used with Arduino to manage stepper motors and to interface between low-level logic circuitry and multiple power loads peripheral, the high-voltage uln004 high-currentDarlington arrays are showing a continuous load current of up to mA for each of its outputs. We use cookies to ensure you have the best experience on our website. Maximum power point in solar converter Circuit suggestion for an current limited power supply application 6.