STCS2ASPR

Overview

The STCS2ASPR is a BiCMOS constant current LED driver IC from STMicroelectronics, designed to replace discrete solutions in low-voltage applications. It operates with an input voltage range of 4.5 V to 40 V and delivers up to 2 A output current with ±10% precision set by an external resistor. The device features less than 0.5 V voltage overhead, PWM dimming capability via a dedicated pin, and a shutdown function. It includes an open-drain diagnostic pin for load disconnection detection. The component is housed in a 10-PowerSO package with a exposed bottom pad, suitable for surface mount installation across a junction temperature range of -40°C to 125°C.

Feature Summary

• Provides precise constant current regulation for LEDs using a single external resistor setting.
• Integrates PWM dimming control and shutdown functionality for flexible system management.
• Includes an open-drain diagnostic output to indicate load disconnection conditions.

Applications

• LED driving in 5 V, 12 V, or 24 V low voltage systems
• Replacing discrete component solutions for improved integration and reliability
• General purpose constant current source applications requiring high precision

Procurement Notes

Verify the specific suffix 'SPR' corresponds to the tape and reel packaging configuration required for your assembly line. Confirm that the 10-PowerSO package dimensions align with your PCB footprint design rules. Ensure thermal management strategies account for the exposed bottom pad on the PowerSO-10 package to maintain operation within the specified -40°C to 125°C junction temperature range under maximum load conditions.

Selection Notes

Select this component when a linear LED driver solution is preferred for simplicity and cost-effectiveness in low-to-medium power applications. It is suitable for designs where input voltage varies but remains within the 4.5 V to 40 V window. Consider the 2 A current limit and the need for an external current-setting resistor when defining the LED string configuration. Verify that the thermal dissipation requirements fit within the capabilities of the chosen PCB layout and enclosure environment.

Part Context

The STCS2ASPR belongs to the STCS2 family of constant current drivers manufactured by STMicroelectronics. This series targets the replacement of discrete transistor-based circuits with integrated, reliable semiconductor solutions. The family emphasizes precision and ease of use for driving LEDs in various industrial and consumer lighting applications where stable current regulation is critical regardless of input voltage fluctuations.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult official STMicroelectronics resources for cross-reference information if alternative sourcing is required.

FAQ

How is the output current value determined?

The output current is set using an external resistor connected to the device, allowing for a maximum current of 2 A with ±10% precision.

What diagnostic features are included?

The IC provides an open-drain pin output that signals when a load disconnection condition is detected.