ULN2003APWR Discrete Semiconductor Products

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Transistor Type:	7 NPN Darlington
Current - Collector (Ic) (Max):	500mA
Voltage - Collector Emitter Breakdown (Max):	50V
Vce Saturation (Max) @ Ib, Ic:	1.6V @ 500µA, 350mA
Current - Collector Cutoff (Max):	50µA
DC Current Gain (hFE) (Min) @ Ic, Vce:	--
Power - Max:	--
Frequency - Transition:	--
Operating Temperature:	-20°C ~ 70°C (TA)
Package / Case:	16-TSSOP (0.173", 4.40mm Width)
Supplier Device Package:	16-TSSOP
Base Part Number:	ULN2003A

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Introduction The ULN2003APWR is a monolithic high-voltage, high-current Darlington transistor array designed for interfacing between low logic level control circuits and higher voltage and/or current loads. It consists of seven Darlington pairs with common emitters. The device features built-in protection circuitry for overload and surge protection. It is available in either 8-pin DIP (Dual In-line Package) or 8-pin SOIC (Small-Outline Integrated Circuit) packages. The ULN2003APWR can be used to solve many problems in a variety of applications such as driving relays, solenoids, lamps, LED arrays, incandescent lamps and other light-emitting devices, stepper and DC motors, digital logic drivers and many others. FeaturesThe ULN2003APWR offers some amazing features which make it a great choice for many applications. These features include: • Improved gain and temperature characteristics. • Wide input operating voltage range. • High output current capability. • Thermal protection. • Output circuit with separate diodes for each driver. • Low on-state saturation voltage. • TTL and CMOS compatible inputs. • Internal series connected diodes for inductive loads. • Treated able for improved performance over temperature.Applications The ULN2003APWR has wide applications due to its features. Some of the applications include: • Motor control: The ULN2003APWR can be used to drive relays, solenoids, and stepper and DC motors. It can also be used in industrial motor control applications. • Lamp drivers: The ULN2003APWR can be used to drive incandescent lamps, metal arc lamps, HID lamps and other light emitting devices. • Logic interfaces: It can be used to drive logic circuits such as TTL and CMOS logic products. • Switches: The ULN2003APWR can be used in a variety of switch applications, including relays, contactors, and reed switches. • Data acquisition systems: The ULN2003APWR can be used in data acquisition systems such as voltage-to-frequency andvoltage-to-resistance converters. • Audio amplification: The ULN2003APWR can be used in audio amplification applications. • Telecommunication: The ULN2003APWR can be used in various signals transmission applications. Working Principle The ULN2003APWR is a monolithic integrated circuit in which seven Darlington transistor pairs are connected with common emitters. Each Darlington pair consists of a high-voltage input and a low-voltage output. The transistors are connected in an open-collector configuration, with the output terminals connected to the junction of the collector terminals of the two transistors. This configuration allows the output voltage to be controlled by the input voltage. When the input voltage is below a certain level, the Darlington pair is in its off state and the output voltage is equal to the input voltage, or near zero. When the input voltage is above the specified level, the Darlington pair is in its on state and the output voltage is equal to the voltage difference between the two transistors’ collector and emitter terminals. The output current can then be controlled by varying the collector current of the first transistor in the pair. Conclusion The ULN2003APWR is a great choice for a variety of applications. It offers improved gain and temperature characteristics, wide input operating voltage range and high output current capability. It is equipped with a built-in thermal protection, output circuits with separate diodes for each driver, low on-state saturation voltage, TTL and CMOS compatible inputs and internal series connected diodes for inductive loads. With its wide range of applications, it is a great choice for many projects.

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