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TD8201 Datasheet(PDF) 1 Page - TECHCODE SEMICONDUCTOR, INC. |
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TD8201 Datasheet(HTML) 1 Page - TECHCODE SEMICONDUCTOR, INC. |
1 / 11 page ![]() December, 20, 2011 Techcode Semiconductor Limited www.techcodesemi.com 1 Techcode® White LED Step-up Converter TD8201 DATASHEET General Description The TD8201 is a step‐up DC/DC converter designed for driving up to 5 white LEDs in series from a single cell Lithium Ion battery with constant current. Because it directly regulates output current, the TD8201 is ideal for driving light emitting diodes (LEDs) whose light intensity is proportional to the current passing through them, not the voltage across their terminals. A single external resistor sets LED current between 2mA and 20mA, which can then be easily adjusted using either a DC voltage or a pulse width modulated (PWM) signal up to 100KHz. Its low 104mV feedback voltage reduces power loss and improves efficiency. The OV pin monitors the output voltage and turns off the converter if an over‐voltage condition is present due to an open circuit condition. The TD8201 is available in SOT23‐6 packages. Features Drives Up to 5 Series White LEDs from 3V Up to 87% Efficiency 1.25MHz Fixed Switching Frequency Low 104mV Feedback Voltage Open Load Shutdown PWM Dimming SOT23‐6 Packages RoHS compliant Applications Cell Phones Handheld Computers and PDAs Digital Cameras Small LCD Displays |
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