The XL5003 is a high-voltage, high-efficiency, dimmable constant-current LED driver IC designed for off-line applications. It supports an 8-lead SOIC package and operates on a universal AC input voltage range of 85–265 V. This monolithic IC can drive 3 to 7 series-connected 1W LEDs with an efficiency of up to 80%. Key features include soft start, LED open/short circuit protection, current limit, and thermal shutdown, making it ideal for a wide range of lighting applications.
The XL5003 is a 600V, 0.5A switching current step-down PFM (Pulse Frequency Modulation) LED constant-current driver IC. It supports both linear and PWM dimming, as well as electroless capacitor solutions. The IC ensures reliable performance with built-in protection mechanisms such as overcurrent protection, undervoltage lockout (UVLO), and a 0.2V reference voltage. It also includes a soft-start function, which helps in reducing inrush current during startup.
The device integrates essential components like an error amplifier (EA), comparator (COMP), latch, gate driver, and a 600V DMOS transistor. Additionally, it features a thermal shutdown circuit that protects the IC from overheating under heavy load conditions. These integrated functions make the XL5003 a compact and efficient solution for LED power supply designs.
The pin diagram of the XL5003 provides a clear view of its configuration and functionality. The IC’s internal block diagram further illustrates how the various components work together to deliver stable and efficient LED driving performance. The pin functions are detailed in Table 1, offering a comprehensive guide for users during the design and implementation process.
Whether you're working on general lighting, automotive, or industrial LED systems, the XL5003 offers a reliable and flexible solution that meets modern power requirements while ensuring long-term stability and safety.
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