STLED524

Overview

The STLED524 is an intelligent matrix LED display driver designed for 5x24 dot matrix configurations. It operates within a 2.7 V to 5.5 V input voltage range and drives each dot with up to 20 mA current via separate low-side current mirrors. The device features an integrated boost DC-DC converter with adjustable output voltage and an internal LDO providing 3.1 V at 80 mA. Key specifications include 255-step PWM dimming, four-way scroll functions, and SPI interface control. The component is housed in a CSP package with 56 bumps, 0.4 mm pitch, measuring 3.4 x 3.0 mm.

Feature Summary

• Integrates a step-up DC-DC converter with adjustable output voltage to optimize efficiency based on LED forward voltage characteristics.
• Provides individual luminance adjustment for each LED through internal registers supporting 255-step dimming levels.
• Includes automatic scrolling capabilities in four directions with optional column data locking functionality.
• Features an internal LDO regulator capable of supplying auxiliary circuitry with a fixed 3.1 V output.

Applications

• Appliance user interfaces
• Display driver for handheld units

Procurement Notes

Verify the specific ordering suffix to ensure the correct packaging type (Tape & Reel, Cut Tape, or Digi-Reel) matches assembly requirements. Confirm RoHS compliance status and湿气敏感性等级 (MSL) ratings prior to integration. Ensure the selected variant aligns with the required operating temperature range of -30°C to 85°C for the intended application environment.

Selection Notes

Select the STLED524 when a compact solution for small matrix displays is required. The integrated power management components reduce external bill of materials. Consider the SPI interface for system integration flexibility. Verify that the 5x24 matrix configuration meets the visual display needs without requiring additional daisy-chaining or expansion drivers.

Part Context

This component belongs to STMicroelectronics' LED lighting development tools and intelligent display driver portfolio. It is specifically engineered for low-power, space-constrained applications requiring precise brightness control. The device complements microcontroller solutions by handling direct LED matrix driving tasks efficiently.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Evaluate compatibility carefully if considering alternative vendors due to unique pinout and register configurations.

FAQ

How is the output voltage of the integrated boost converter adjusted?

The output voltage of the integrated boost DC-DC converter can be adjusted via internal registers to optimize efficiency according to the specific forward voltage of the LEDs used.

What is the maximum drive current per LED dot?

The STLED524 can drive each dot in the matrix with a current of up to 20 mA.

Can the display content be scrolled automatically?

Yes, the device supports automatic scrolling of display content in four ways, with the possibility to lock column data during the process.