Introducing the AP1609SA LED Driver IC from Diodes Incorporated

The AP1609SA is a high-performance, PWM (Pulse Width Modulation) controlled step-up converter specifically designed for driving white LEDs. Manufactured by Diodes Incorporated, a leading global manufacturer and supplier of high-quality application-specific standard products within the broad discrete, logic, analog, and mixed-signal semiconductor markets, the AP1609SA is an ideal solution for powering LED backlighting in portable devices, as well as decorative and emergency lighting.

With its capability to drive up to 27 LEDs in series from a single cell Lithium Ion battery, the AP1609SA ensures uniform brightness and maintains a high efficiency rate. The device operates at a fixed frequency of 1.2MHz, allowing the use of small, low-profile inductors and capacitors to minimize space and cost in the overall design.

The AP1609SA features a low startup voltage of just 0.8V and a wide input voltage range from 2.7V to 5.5V, making it highly versatile for various applications. Its built-in over-voltage protection ensures that the output voltage does not exceed a certain threshold, thus protecting the LEDs and extending their lifespan. Additionally, the AP1609SA boasts a low shutdown current of less than 1μA, contributing to the energy efficiency of the end application.

For ease of use, the AP1609SA integrates a soft-start function that minimizes inrush current during startup, thereby enhancing system reliability. Its internal open LED protection prevents the IC from overheating and damage that could occur due to an open circuit condition.

Available in a compact SOT-89-5 package, the AP1609SA from Diodes Incorporated is a practical and efficient solution for designers looking to implement an LED driver with a small footprint, high efficiency, and reliable protection features. Whether it's for handheld devices or stationary lighting applications, the AP1609SA stands out as a robust component for LED driving needs.