ULN2803 darlington transistor array
The ULN2803 is a high-voltage, high-current Darlington transistor array, designed to interface logic-level signals to various high-power loads. This device consists of eight NPN Darlington pairs with common-emitter configuration, capable of driving high-current loads up to 500mA per channel. The integrated clamp diodes make it suitable for driving inductive loads such as relays, solenoids, and stepper motors.
Key Features:
- Eight NPN Darlington pairs
- High output current: 500mA per channel
- High sustaining voltage: 50V
- Input compatible with TTL and CMOS logic levels
- Integrated freewheeling diodes for inductive load driving
- Standard 18-pin DIP and SOIC packages
- Collector-Emitter Voltage (Vce): 50V
- Output Current (Iout): 500mA per channel
- Input Voltage (Vin): 30V
- Clamp Diode Forward Voltage: 2.7V
- Clamp Diode Reverse Voltage: 50V
- DC Current Gain (hFE): 1000 (typical)
- Power Dissipation (Pd): 2.25W (DIP package), 1.47W (SOIC package)
- Operating Temperature Range: -40°C to +85°C
- Package: 18-pin DIP and SOIC
- Relay drivers
- Lamp drivers
- Stepper motor drivers
- LED and incandescent display drivers
- Line drivers