STMicroelectronics

STLD41PUR

STLD41PUR Description

The STLD41PUR from STMicroelectronics is a high-efficiency DC-DC regulator designed for LED driving applications, particularly backlighting systems. Operating within a 3V to 21V input voltage range, it delivers a regulated 38V output with a 120mA current per channel, making it suitable for driving single-string LED configurations. The device integrates an internal switch, eliminating the need for external components and simplifying design. With a 1.4MHz switching frequency, it ensures compact PCB layouts and reduced EMI interference. The PWM dimming capability allows precise brightness control, critical for display applications. Packaged in an 8QFN and supplied in Tape & Reel (TR), it is optimized for surface-mount assembly.

STLD41PUR Features

• Integrated DC-DC Regulator: Combines internal switching for space-saving designs.
• Wide Input Range (3V–21V): Supports diverse power sources, including batteries and adapters.
• High-Frequency Operation (1.4MHz): Enables smaller passive components and reduced noise.
• PWM Dimming: Ensures flicker-free brightness adjustment for displays.
• Compact 8QFN Package: Ideal for space-constrained applications.
• ROHS3 & REACH Compliant: Meets environmental and regulatory standards.
• High Output Voltage (38V): Drives multiple LEDs in series efficiently.

STLD41PUR Applications

• LCD Backlighting: Smartphones, tablets, and automotive displays.
• Portable Electronics: Battery-powered devices requiring efficient LED drivers.
• Industrial Panels: Control interfaces with adjustable backlighting.
• Consumer Electronics: TVs, monitors, and signage with PWM-controlled brightness.

Conclusion of STLD41PUR

The STLD41PUR stands out for its integration, efficiency, and flexibility, making it a robust choice for LED driving solutions. Its PWM dimming, wide voltage range, and compact form factor cater to modern display requirements, while compliance with ROHS3 and REACH ensures environmental safety. Though marked Obsolete, its design advantages remain relevant for legacy or specific applications requiring reliable backlight drivers. Engineers should evaluate alternatives for new designs but can leverage this IC for proven performance in existing systems.