ULN2003AIPW

Overview

The ULN2003AIPW is a high-voltage, high-current Darlington transistor array manufactured by Texas Instruments. It integrates seven independent NPN Darlington pairs within a single package, each featuring common emitters and integrated clamp diodes for inductive load suppression. The device operates with a maximum collector-emitter voltage of 50 V and supports a continuous collector current of 500 mA per channel. It utilizes a 16-pin TSSOP surface-mount package with a standard operating temperature range from -40°C to +85°C. The internal input resistors provide direct compatibility with TTL, CMOS, PMOS, and DTL logic families, simplifying interface design.

Feature Summary

• Integrates seven independent Darlington pairs with common emitter configuration
• Includes built-in clamp diodes across each output and common pin for inductive kickback protection
• Features internal base resistors enabling direct drive from TTL, CMOS, PMOS, and DTL logic outputs
• Supports high-voltage operation up to 50V and high-current switching capabilities

Applications

• Relay driver circuits
• Stepper motor control systems
• High-current or high-voltage switching loads
• Line drivers and logic buffers

Procurement Notes

Verify the specific suffix 'IPW' confirms the TSSOP-16 package variant when sourcing. Ensure the component meets the required thermal dissipation standards for the intended PCB layout. Confirm that the supply voltage and current ratings align with the connected load specifications to prevent device failure during operation.

Selection Notes

Select this component when a compact surface-mount solution is required for driving multiple inductive loads. The TSSOP-16 package offers space efficiency compared to through-hole alternatives. Verify that the 500mA per-channel current limit satisfies the peak requirements of the target application without exceeding thermal constraints.

Part Context

This part belongs to the ULN2003A series of high-voltage Darlington arrays. It serves as a bridge between low-power logic controllers and high-power actuators. The IPW designation specifically identifies the plastic small-outline package variant, distinguishing it from DIP or other package styles within the same electrical family.

Replacement Considerations

The ULN2003DR is a compatible alternative offering identical electrical characteristics in a SOIC-16 package. Verify pinout compatibility and thermal performance differences due to the distinct package geometry before substituting.