The XL5003 is a high-voltage, high-efficiency, dimmable constant-current LED driver IC designed for off-line applications. It operates on a universal AC input voltage range of 85–265 V and can drive 3 to 7 series-connected 1W LEDs with an efficiency of up to 80%. This monolithic IC features essential protection mechanisms such as soft start, LED open/short circuit protection, current limit, and thermal shutdown, making it ideal for reliable and efficient lighting solutions.
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, along with electroless capacitor solutions, offering flexibility in design. The IC is suitable for international universal AC line input LED power supplies and can drive 3 to 7 1W LEDs in series. It includes advanced functions like soft start, LED open/short protection, and thermal shutdown to ensure safe and stable operation.
The package pin diagram of the XL5003 is shown below:
The internal architecture of the XL5003 includes a soft-start circuit, a 0.2V reference voltage, VDD undervoltage lockout (UVLO), error amplifier (EA), comparator (COMP), pulse frequency modulation (PFM), and overcurrent protection (OCP). It also features a latch and gate driver, a 600V DMOS transistor, and a thermal shutdown circuit, as illustrated in the function block diagram below:
The pin functions of the XL5003 are detailed in the following table:
With its compact 8-lead SOIC package, the XL5003 offers a space-saving solution for high-performance LED driver applications. It is widely used in various lighting systems, including indoor and outdoor LED lighting, automotive lighting, and industrial applications where efficiency and reliability are critical. Whether you're looking for a cost-effective, high-efficiency LED driver or a solution that supports multiple dimming methods, the XL5003 provides a robust and flexible platform for modern lighting designs.
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