CXLE81103 step-up converter drives white LEDs with a constant current to provide backlight in cell phones, PDAs, and other hand-held devices. It features allowing series connection of the white LEDs

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The CXLE81103 step-up converter drives white LEDs with a constant current to provide backlight in cell phones, PDAs, and other hand-held devices. It features allowing series connection of the white LEDs so that the LED currents are identical for uniform brightness. An enable input can be pulsed repeatedly to adjust LED’s brightness. The fast 1.0MHz current-mode PWM control allows for smaller capacitor and inductor. Fault condition protection uses cycle-by-cycle current limiting to sense maximum inductor current, thermal protection and over-voltage protection. Also included soft-start eliminates inrush current during start-up. The 0.2V low reference voltage minimized the power loss across the current-setting resistor. The CXLE81103 is available in SOT-23-6 packages.

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„ Operating Voltage: 2.5V to 5.5V. Fm8嘉泰姆

„ High Operating Frequency: 1MHz Fm8嘉泰姆

„ High Output Voltage: Up to 40V(Typ.) Fm8嘉泰姆

„ Digital Dimming Control. Fm8嘉泰姆

„ Built-in Cycle-by Cycle Current-Limiting. Fm8嘉泰姆

„ Built-in Soft-Start Function. Fm8嘉泰姆

„ 0.2V Low Reference Voltage Fm8嘉泰姆

„ Thermal Overload Protection Fm8嘉泰姆

„ SOT-23-6 PackageFm8嘉泰姆

   应用范围 返回TOPFm8嘉泰姆

„ GPS Navigation System Fm8嘉泰姆

„ Compact Back Light Module Fm8嘉泰姆

„ Constant Current Source Fm8嘉泰姆

„ LED ModuleFm8嘉泰姆

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