CXLE8191 versatile constant current LED driver with a high efficiency step-up converter architecture. The low-side power MOSFET is integrated in the device, significantly shrinking the overall PCB lay

   产品概述 返回TOPkWQ嘉泰姆

The CXLE8191 is a versatile constant current LED driver with a high efficiency step-up converter architecture. The low-side power MOSFET is integrated in the device, significantly shrinking the overall PCB layout area and minimizing the total number of external components. Unique technology and high 1.35A current limit allow CXLE8191 to drive up to 38V output (10 LEDs in series). Alternatively, CXLE8191 can deliver 260mA total current with 3 series LEDs per string. It can also maximize the current capability while achieving high conversion efficiency. The optimized 1MHz switching frequency results in reduced conduction loss and small external component size. Digital PWM dimming interface is integrated to adjust LED current. The PWM frequency is in the range from 2kHz to 60kHz.kWQ嘉泰姆

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Various protection features are built into the CXLE8191, including cycle-by-cycle input current limit protection, open LED (output over-voltage) protection and thermal shutdown protection. The leakage current in shutdown mode is less than 1μA.kWQ嘉泰姆

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The CXLE8191 is available in Green TSOT-23-6 package. It operates over an ambient temperature range of -40℃</span> to +85℃</span>.kWQ嘉泰姆

   产品特点 返回TOPkWQ嘉泰姆

• Wide Output Range: Up to 10 Series LEDs
• Integrated 40V High Current Switch (1.35A Limit)
• 2.7V to 5.5V Input Voltage Range
• High Efficiency PWM Converter
• Low 200mV Feedback Voltage
• 500kΩ Pull-Low Resistor on CTRL Pin
• 2kHz to 60kHz PWM Dimming Frequency
• 38V Open LED Protection
• 1MHz Switching Frequency
• Integrated Soft-Start Function
• Less than 1μA Shutdown Current
• Simple, Small Solution Size
• Available in Green TSOT-23-6 Package
• -40℃</span> to +85℃</span> Temperature RangekWQ嘉泰姆

   应用范围 返回TOPkWQ嘉泰姆

LED Backlighting
Mobile Phones
Handheld Devices
Digital Photo Frames
Automotive NavigationkWQ嘉泰姆

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