ULN2803A Darlington Array SMD IC – High-Voltage High-Current Driver
ULN2803A Darlington Array SMD IC – High-Voltage High-Current Driver
ULN2803A Darlington Transistor Array – Reliable High-Voltage, High-Current Drive
The ULN2803A Darlington Transistor Array (SMD package) is a dependable eight-channel driver IC engineered for high-voltage and high-current switching applications. Whether you're working on relay drivers, stepper motor controllers, display panels, or embedded computer systems, this versatile chip delivers consistent performance in a compact surface-mount form factor.
Key Specifications
- Model: ULN2803A (2803 Darlington Array)
- Package: SMD (Surface Mount Device)
- Output Current Rating: 500 mA per channel
- Supply Voltage: Up to 50 V
- Operating Temperature Range: -40°C to +85°C
- Condition: Brand New
- High-Concern Chemicals: None
- Application: Computer systems, motor drivers, relay interfaces, and more
Made in Mainland China.
Why Choose the ULN2803A?
The ULN2803A integrates eight NPN Darlington transistor pairs in a single IC, allowing you to drive multiple high-current loads simultaneously from low-level logic signals (TTL, CMOS, PMOS). Its wide operating temperature range makes it suitable for both indoor and light industrial environments, while the SMD footprint keeps your PCB designs slim and efficient.
Ideal Applications
- Relay and solenoid drivers
- Stepper and DC motor control
- LED and lamp arrays
- Printer and display drivers
- Embedded microcontroller output expansion
- General-purpose high-current switching circuits
What's Included
- 1 × ULN2803A SMD Darlington Array IC
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Frequently Asked Questions
Q: What is the ULN2803A Darlington Array used for?
A: The ULN2803A is an 8-channel Darlington transistor array commonly used to drive high-current loads such as relays, stepper motors, LEDs, solenoids, and display drivers from logic-level signals (TTL or CMOS). It is widely used in computer interface boards and embedded electronics projects.
Q: What package type is this ULN2803A and what current can it handle?
A: This ULN2803A comes in an SMD (Surface Mount Device) package. Each channel is rated for up to 500 mA output current, with a maximum supply voltage of 50 V, making it suitable for a broad range of switching and driver circuit applications.
Q: What operating temperature range does this IC support?
A: The ULN2803A SMD IC operates reliably across a temperature range of -40°C to +85°C, making it suitable for standard commercial and light industrial environments.