Universal, High-Brightness LED Drivers Cover Wide Input-Voltage Range with Dimming and High-Current (1)

Universal, High-Brightness LED Drivers Cover Wide Input-Voltage Range with Dimming and High-Current Accuracy for Constant Current-Source Applications

Maxim Integrated Products (NASDAQ: MXIM) introduced the MAX16801/MAX16802 high-brightness (HB) LED drivers with a wide input-voltage range. The MAX16801 is well suited for universal AC input (rectified 85V to 265VAC) LED drivers, while the MAX16802 is intended for DC-input-voltage LED drivers (10.8V to 24VDC or higher with external bias). The MAX16801/MAX16802 have a 262kHz fixed switching frequency and current-mode control. An external MOSFET provides high-power (over 50W) and high-efficiency (over 85%) operation, and allows for small size components which reduces system cost.

Strings of HB LEDs can be driven with a wide (0 to 100%) dimming range by using PWM or linear dimming control. When the LED current requires tight regulation, designers can use the additional on-board error amplifier with a 1% accurate reference. These devices are ideal for buck, boost, SEPIC, and isolated or non-isolated flyback topologies in general lighting applications, decorative and architectural lighting, display backlighting, and other constant current-source LED applications.