LC3300 Datasheet | Leadchip semi

DESCRIPTION The LC3300 variable frequency 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 LEDs brightness. The fast 3MHz operation frequency allows for smaller capacitor and inductor. Fault condition protection uses cycle-by cycle current limiting to sense maximum inductor current and over-voltage protection. The 0.2V low reference voltage minimized the power loss across the current sense resistor. The converter can operate from 2V to 6V, and capable of delivering maximum 200m A output current at 4-LEDs application with 3V input voltage. Quiescent current drawn from power source is as low as 120u A. All of these Features make LC3300 be suitable for the portable devices, which are supplied by a single battery. LC3300 is available in SOT23-6 package that is PB free. Features - - - - - - - - Up to 24V Output Voltage Wide Operation Range: 2V to 6V Maximum 3MHz Operating Frequency PWM Dimming Control Shutdown Current <1u A Current Limit Cycle-by-Cycle Low Current Sense Threshold: 200m V 24V Over Output Voltage Protection pact SOT23-6 Package - APPLICATIONS - - - pact Back Light Module Power Source for LED Constant Current Source TYPICAL APPLICATION L1 VIN 10u H D1 SS14 LED1 LED17 LED2 Cin 4.7u F LED18 Cout 4.7u F LED3 LED19 ON OFF LX OVP LED4 FB...