ULN2803ADWR

The ULN2803ADWR is a high-voltage, high-current Darlington transistor array manufactured by Texas Instruments, suitable for various driving applications. Below are some key features and parameters of the ULN2803ADWR:

Key Features

• Darlington Transistor Array: Contains 8 NPN Darlington pairs, providing high gain and high current capability.
• High Current Drive: Each channel can drive up to 500mA load current.
• High Voltage Output: Maximum output voltage up to 50V.
• Integrated Clamp Diodes: Each output channel includes a clamp diode for inductive load protection.
• TTL/CMOS Compatible Inputs: Wide input voltage range, compatible with standard TTL and CMOS levels.

Typical Applications

• Relay Drivers: Suitable for driving multi-channel relays.
• Lamp and LED Drivers: Used for controlling multiple lamps and LED displays.
• Motor Drivers: Suitable for driving small motors.
• Printers and Fax Machines: Used for driving print heads and other actuators.
• Industrial Control: Suitable for load driving in various industrial control applications.

Package Type

The ULN2803ADWR typically comes in an 18-pin SOIC (Small Outline Integrated Circuit) package, offering good thermal performance and a small footprint.

Electrical Parameters

• Input Voltage Range: 2V to 30V
• Output Current Per Channel: Maximum 500mA
• Maximum Output Voltage: 50V
• Input Current: 0.93mA per channel

Advantages

• High Integration: One chip contains 8 driver channels, saving PCB space.
• High Reliability: Integrated clamp diode protection, suitable for driving inductive loads.
• Good Compatibility: Wide input voltage range, compatible with various logic levels.
• Easy to Use: Standardized packaging and pin layout, simplifying design.