XD2003 7 CHANNELS DARLINGTON SINK DRIVER

Product Overview

The XINLUDA XD2003 is a high-voltage, high-current Darlington transistor array consisting of seven NPN Darlington pairs, tailored for driving inductive or high-current loads directly from logic-level control. It is functionally equivalent to the industry-standard ULN2003AN, making it suitable as a direct replacement in existing designs.

Advantage: Full pin-to-pin compatibility with ULN2003AN ensures effortless substitution in designs that require relay drivers, LED banks, or motor control circuits.

Output Drive Capability

Both the XD2003 and ULN2003AN provide:

• Seven independent Darlington channels

• 500 mA sink current capability per channel

• Up to 50 V output voltage handling

The XD2003 maintains stable performance under high-load conditions with minimal thermal drift.

Advantage: XINLUDA’s XD2003 exhibits lower output saturation voltage in typical applications, which reduces power loss and improves system energy efficiency.

Logic-Level Input Compatibility

The XD2003 is designed to interface directly with 5V TTL and CMOS logic levels, the same as the ULN2003AN. Internal base resistors simplify direct interfacing with microcontrollers, FPGAs, or discrete logic circuits.

Advantage: Integrated input resistors eliminate the need for external components, reducing BOM complexity and saving PCB space.

Integrated Freewheeling Diodes

Both devices incorporate internal flyback diodes (clamp diodes) to handle back EMF from inductive loads. These are tied to a common COM pin for easy connection to the supply voltage.

Advantage: Built-in protection diodes in the XD2003 ensure high reliability in relay- and motor-driving applications by preventing damage from voltage transients.

Packaging and Pin Configuration

The XD2003 is offered in DIP-16 and SOP-16 packages, matching the industry-standard footprint of ULN2003AN devices.

Advantage: The identical mechanical and electrical interface allows the XD2003 to be used as a drop-in replacement without any PCB or layout modifications.

Performance, Reliability, and Qualification

XINLUDA ensures robust manufacturing and test processes, resulting in the following characteristics:

• Low output saturation voltage across all channels

• Wide operating temperature range: –40°C to +85°C

• Stable performance across production batches

Advantage: The XD2003 offers enhanced electrical consistency and long-term reliability, making it well-suited for industrial, commercial, and consumer-grade systems.

Supply Chain Stability and Cost Efficiency

With increasing concerns around the supply volatility of ULN2003AN devices from global brands, the XINLUDA XD2003 offers a cost-competitive and readily available alternative, ensuring uninterrupted mass production support.

Advantage: Competitive pricing and dependable supply make the XD2003 a strong choice for OEMs and manufacturers focused on both performance and procurement efficiency.

Conclusion

The XINLUDA XD2003 provides a high-performance, cost-effective, and fully compatible alternative to the ULN2003AN, with the following distinct advantages:

• Direct logic-level interface with integrated input resistors

• Built-in protection diodes for inductive loads

• Low saturation voltage for better thermal and energy efficiency

• DIP-16/SOP-16 drop-in form factor

• Reliable availability and lower BOM cost

The XD2003 is ideally suited for relay control, LED matrix drivers, stepper motors, and other medium-current switching applications that demand reliability, affordability, and ease of integration.