Uln2803

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

Technical Specifications:

• 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

Applications:

• Relay drivers
• Lamp drivers
• Stepper motor drivers
• LED and incandescent display drivers
• Line drivers

Datasheet: For detailed technical information, please refer to the ULN2803 Datasheet.