The collector current rating for each np-n Darlington pair is about 500 mA. In this device, eight Darlington pairs of np-n configuration are present that have the feature of high voltage outputs along with the common-cathode clamp diodes that is used to switch inductive loads. The datasheet of ULN2803 specifies that this chip is a high current, high voltage Darlington transistor array. UNL2003 interfacing with microcontroller.So in this article, we will discuss pin configuration of ULN2803, features as well as specification, how & where to use this and in the last, we will highlight some applications that are developed by using this chip. TTL and make use of that low-level signal in switching off loads of higher voltage present at the output side. The ULN2803 chips take the low-level signals at input side i.e. All these chips operate at either 0 volts or 5 volts thus these are not capable of driving loads of high inductive power. Some of these chips are CMOS, NMOS, TTL, and PMOS. Usually, the chips being used operate on the low-level signals. Today in this article, we are going to introduce you to ULN2803 which is high current as well as high voltage Darlington transistor array.
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