STCS1APUR

Overview

The STCS1APUR is a BiCMOS constant current source LED driver from the STCS1A series, manufactured by STMicroelectronics. It provides precise constant current regulation up to 1.5 A with ±10% precision, set via an external resistor. The device supports PWM dimming and includes a shutdown pin for control. It operates within an input voltage range of 4.5 V to 40 V and features less than 0.5 V voltage overhead. The output current rise slope is adjustable using an external capacitor to reduce EMI. An open-drain diagnostic pin indicates load disconnection. It is housed in an 8-DFN (3x3) package with exposed pad and functions across a temperature range of -40°C to +150°C TJ.

Feature Summary

• Provides precise constant current regulation up to 1.5 A with ±10% accuracy
• Supports PWM dimming and includes a dedicated shutdown pin
• Features adjustable current rise slope via external capacitor for EMI reduction
• Includes open-drain diagnostic output for load disconnection detection

Applications

• Driving LEDs in low voltage applications such as 5 V, 12 V, or 24 V systems
• Replacing discrete component solutions for LED driving to improve integration and reliability
• LED lighting drivers requiring constant current sources

Procurement Notes

Verify the specific suffix 'PUR' corresponds to the tape and reel packaging configuration when ordering. Confirm that the 8-DFN package dimensions and thermal pad requirements match the target PCB layout. Ensure the design accommodates the external components required for setting the current, PWM frequency, and slope control as specified in the official datasheet.

Selection Notes

Select this component for applications requiring a single-channel linear LED driver with high precision and integrated diagnostics. It is suitable for replacing discrete designs in low-voltage environments. Consider the 1.5 A maximum output current and the need for external resistors and capacitors for configuration. Verify compatibility with the system's input voltage range and thermal management capabilities.

Part Context

The STCS1APUR belongs to the STCS1A family of constant current LED drivers. This series is designed to offer a compact alternative to discrete LED driving solutions, emphasizing precision and reliability. The part integrates essential features like PWM dimming and fault diagnosis into a small surface-mount package, targeting efficient implementation in various LED lighting architectures.

Replacement Considerations

STCS1PUR is listed as a parameter-equivalent substitute.