describe

The ULN2803A device is a 50 V, 500 mA Darlington transistor array. The device consists of eight NPNs, and the Darlington pair has a common cathode clamping diode induction load for high-voltage output switches. The rated current of each collector, Darlington pair, is 500 milliamperes. Darlington pairs can be connected in parallel to achieve higher current capacity.

application

Including relay drivers, hammer drivers, etc., light drivers, display drivers (LED and gas discharge), line drivers, and logic buffers.

This ULN2803A device has a 2.7-k Ω series base resistor

Used for direct communication with TTL or 5V CMOS devices.

characteristic

1 • 500 mA rated collector current

(Single output)

High voltage output: 50 V

• Output clamping diode

• Inputs compatible with various types of logic

application program

Relay driver

Hydraulic hammer driver

• Lamp driver

• Display driver (LED and gas discharge)

• Line driver

• Logic buffer

Stepper motor

• IP camera

HVAC valves and LED dot matrix