![]() ![]() This chip can also be used for programmable load sharing.However, the MOSFETs, as well as transistors that are being used in this chip, will suffice and also placing eight loads at the same time will be a cumbersome job but this chip is widely used in order to replace the bulk switching devices. If you are willing to drive multiple loads, then this chip can be used as it is capable of driving eight loads at a time.Each set of these Darlington pair is capable of driving high power loads that use logic from the control unit. In ULN2803, the Darlington array act as separate 8 individual switches and thus can be turned off and on as desired. To control the inductive loads those are making use of the logic obtained by the control unit.The ULN2803 chip can be used in the following cases: You can remodel eight Darligngton Transistors or eight MOSFETs to substitute for ULN2803. There are no PIN-to-PIN replacements for ULN2803 but there are similar functioning ICs like ULN2003, ULN2004. Here we take ULN2803A as an example to introduce ULN2803 package. Its rated current is usually 50v / 500mA. This IC is widely used to drive high loads, such as lamps, relays, motors, etc. The IC consists of eight NPN Darlington-connected transistors and a common clamp diode to switch the load connected to the output. ULN2803 is a high-voltage, high-current transistor array IC, especially for microcontrollers that need to drive high-power loads. In order to operate this chip, no additional power is needed.The operating temperature of ULN2803 lies in the range of -65☌ – 150☌.Typically, the fall time is 20micro-second.In each Darlington pair, a fly-back diode is present and the maximum current that is allowed to pass through that is 500 mA.Between the emitter and base of the Darlington pair, the maximum voltage that is allowed is 30 volts.The maximum current that is allowed to flow through the collector of every Darlington pair is 500 mA.The allowed maximum voltage between emitter & collector for each and every Darlington transistor is 50 volts. ![]() The specifications, as well as features of ULN2803, are as follow: ULN2803 is widely used in the following applications: We will be glad to find that this blog can be useful for people loving electronic components.ĬOM- Common cathode (Negative) node for flyback diodes.ĬOLLECTOR CONNECTIONS for DARLINGTON ARRAYs This blog provides you with a basic overview of the ULN2803 transistor, including its pin descriptions, functions and specifications, alternative products, etc., to help you quickly understand what ULN2803 is. Each Darlington pair has a collector-current rating of around 500 mA. The component contains eight NPN Darlington pairs with high-voltage outputs and common-cathode clamp diodes that are directly related to switching inductive loads. The Darlington pairs are connected in a parallel configuration to increase current capability. The ULN2803 is a relay driver with a Darlington transistor array that can operate at high voltages and currents. The ULN2815A is available in DIP Package, is part of the IC Chips.ĭescription: BRIDGE RECT 1PHASE 600V 8A GBUĬompany: TE Connectivity Potter & Brumfield Relaysĭescription: RELAY GEN PURPOSE SPDT 30A 240Vĭescription: Operational Amplifiers - Op Amps Dual General Pĭescription: CERAMIC RES 16.0000MHZ 15PF SMDĭescription: IC TRNSLTR BIDIRECTIONAL 20TSSOPĭescription: SENS HUMI/TEMP 2.5V I2C 4.5% SMDĭescription: MICROCONTROLLER, 8 BIT, HC08/S08ĭescription: IC BUF NON-INVERT 5.5V SOT23-5The ULN2803 is a relay driver. ULN2815A with circuit diagram manufactured by ALLEGRO. The ULN2814A is available in DIP18 Package, is part of the IC Chips. ULN2814A with user guide manufactured by ALLEGRO. The ULN2813A-T is available in DIP Package, is part of the IC Chips. ULN2813A-T with pin details manufactured by ALLEGRO. We are always happy to hear from you so feel free to contact us. If you did not find what you were looking for, you can get more value information by email, such as the ULN2823A Inventory quantity, preferential price, and manufacturer. The production status marked on is for reference only. The ULN2823A components of Jotrin Electronics are carefully chosen, undergo stringent quality control, and are successfully meet all required standards. Here you can find a wide variety of types and values of electronic parts from the world's leading manufacturers. The ULN2823A parts manufactured by ALLEGRO are available for purchase at Jotrin Electronics website.
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