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EV0056 Datasheet(PDF) 1 Page - Monolithic Power Systems |
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EV0056 Datasheet(HTML) 1 Page - Monolithic Power Systems |
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1 / 3 page  EV0056 Fixed Frequency White LED Driver EVALUATION BOARD EV0056 1.0_08/01/03 Monolithic Power Systems, Inc. 1 Monolithic Power Systems General Description The EV0056 evaluation board is designed for backlights using white LEDs. It implements MPS’ MP1518 fixed frequency step-up converter. The MP1518 is a 6 pin thin SOT23 step up converter designed for driving up to 6 series white LEDs from a single cell Lithium Ion battery. The MP1518 uses current mode, fixed frequency architecture to regulate the LED current, which is measured through an external current sense resistor. It’s low 100mV feedback voltage reduces power loss and improves efficiency. To prevent damage due to an open circuit condition, the OV pin monitors the output voltage and turns off the converter if an over-voltage condition is present. The MP1518 includes under-voltage lockout, current limiting and thermal overload protection preventing damage in the event of an output overload. The MP1518 is available in a small 6 lead TSOT23 package. Ordering Information Board Number MPS IC Number EV0056 MP1518DJ Absolute Maximum Ratings SW -0.5V to 28V All Other Pins except OV -0.3V to 6.5V Recommended Operating Conditions IN Supply Voltage 2.5V to 6V Features On Board Power MOSFET Drives up to 6 Series White LEDs Up to 86% Efficiency Over 1MHz Fixed Switching Frequency Open Load Shutdown Low 100mV Feedback Voltage Soft Start/PWM Dimming UVLO, Thermal Shutdown Internal Current Limit Applications Cell Phones Handheld Computers and PDAs Digital Still and Video Cameras Small LCD Displays Figure 1: EV0056 Evaluation Board Actual Size = 1.9”X x 1.8”Y |
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