ULN2003VAS16-13

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The ULN2003VAS16-13 is an integrated circuit that can be classified under the section of transistors - bipolar (BJT) - arrays. It is widely used when it comes to driving a large number of loads. This integrated circuit integrated with 16 darlington arrays, which are useful in controlling larger currents with only the aid of small control signals. Furthermore, it also has the ability to drive DC motors, stepper motors, relays or piezo-electric buzzers. In this article, we shall focus on the application field and working principle of the ULN2003VAS16-13.

Application Field

The ULN2003VAS16-13 is a product from Texas Instruments, produced on an advanced CMOS technology for higher performance with lower power consumption. It is an integrated circuit that can be used for driving a large number of loads, such as relays, DC motors, lamps, piezo-electric buzzers and stepper motors. Usually, it is used to control the current of the controlled load. It is available in both 8-pin and 16-pin devices, the 8-pin devices contain eight darlington arrays and the 16-pin device contains 16 darlington arrays. The ULN2003VAS16-13 can switch up to 500 mA of current with a voltage rating of 50 V. This integrated circuit can be used for such applications as industrial controllers, automotive control systems, smart meter interfaces and toys.

Working Principle

This integrated chip contains 16 darlington arrays, each composed of two sets of NPN transistor. Each of these darlington arrays can control up to 50V of current, with a maximum of 500 mA. It works in such way that when triggered by a signal, it will produce a voltage to activate the transistor. The ON and OFF controls are operated by the enable control line. The ULN2003VAS16-13 works in such way that two resistors are connected in parallel, with one grounded (R1) and the resistor connected to Vcc (R2). The R1 is used as a pull up resistor. So, when a signal comes in, it will activate the gate, which will cause the current to flow through the transistor and thus, the voltage across the pull up resistor will drop. When the voltage drops to a certain level, the transistor will be activated and the ULN2003VAS16-13 will be enabled and the current will flow through the controlled load.

Conclusion

The ULN2003VAS16-13 is an integrated circuit that can be classified under the transistors - bipolar (BJT) - arrays section. This integrated circuit is mainly used for driving a large number of loads, such as DC motors, stepper motors, relays and piezo-electric buzzers. This integrated circuit works by providing a controlled voltage to activate the transistor, which in turn activates the controlled load. It is a versatile integrated circuit with many applications such as smart meters, toys, automotive control systems and industrial controllers.

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