Uln2003 Ic Circuit Diagram. The uln2003a is a high voltage high current darlington transistor array consisting of seven npn darlington pairs that feature high voltage outputs with common cathode clamp diodes for switching inductive loads. The ic uln2003a comprises of 7 npn darlington pairs as shown in the internal schematic diagram and is typically used to switch inductive loads dissipates voltage spikes if any using suppression diode and to drive stepper motors.
The usage of uln2003 is easy but due rules and regulations of every ic uln2003 also need to be followed by its requirement. The pin diagram of ic uln2003a is shown in the above figure which consists of 16 pins. These ics are used as relay drivers as well as to drive a wide range of loads line drivers display drivers etc.
This ic is also normally used while driving stepper motors.
Relay driver ic uln2003 internal schematic diagram. Internally uln2003a is made of hybrid combination of logic gates and diodes. In this circuit diagram pic microcontroller is providing signal to 4 relays through relay driver ic uln2003. The pin diagram of ic uln2003a is shown in the above figure which consists of 16 pins.
