PT4115B89E Constant Current Step-Down LED Driver (C84512, SOT89-5)

Power your high-brightness LEDs safely and efficiently with the PT4115B89E continuous-mode inductive step-down converter. Unlike standard voltage regulators, this dedicated LED driver provides a strict constant current output, protecting your high-power LEDs from thermal runaway and ensuring consistent brightness regardless of voltage fluctuations.

Operating from a wide input voltage range of 6V to 30V, it can deliver up to 1.2A of output current, making it perfect for custom drone navigation lights, RC car headlights, or DIY lighting arrays. It features a dedicated DIM pin that allows for both DC voltage and PWM dimming, giving you total control over the brightness levels via a microcontroller. Housed in a thermally efficient SOT89-5 package, it keeps your lighting circuits compact, cool, and highly reliable.

Key Features:

• Constant Current Output: Specifically designed to safely drive single or multiple series-connected high-power LEDs without flickering.

• Wide Input Voltage: Operates seamlessly from 6V up to 30V, making it highly compatible with 2S to 6S LiPo battery setups.

• Versatile Dimming: Supports both PWM and DC voltage dimming via a single control pin for smooth brightness adjustments.

• High Efficiency: Switching step-down topology ensures up to 97% efficiency, minimizing heat generation on small PCBs.

Specifications:

• Part Number: PT4115B89E (LCSC: C84512)

• IC Type: Step-Down (Buck) LED Driver

• Input Voltage Range: 6V – 30V

• Max Output Current: Up to 1.2A

• Dimming Control: PWM / DC

• Package Type: SOT89-5 (SMD/SMT)