TD8201
TD8201 is White LED Step-up Converter manufactured by Techcode.
T echcode®
White LED Step-up Converter
General Description
Features
The TD8201 is a step‐up DC/DC converter designed for driving z Drives Up to 5 Series White LEDs from 3V up to 5 white LEDs in series from a single cell Lithium Ion z Up to 87% Efficiency battery with constant current. Because it directly regulates z 1.25MHz Fixed Switching Frequency output current, the TD8201 is ideal for driving light z Low 104m V Feedback Voltage emitting diodes (LEDs) whose light intensity is z Open Load Shutdown proportional to the current passing through them, not the z PWM Dimming voltage across their terminals. A single external resistor sets z SOT23‐6 Packages
LED current between 2m A and 20m A, which can then be z Ro HS pliant easily adjusted using either a DC voltage or a pulse width modulated (PWM) signal up to 100KHz. Its low
104m V feedback voltage reduces power loss and
Applications 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. z Cell Phones z Handheld puters and PDAs z Digital Cameras z Small LCD Displays
December, 20, 2011 Techcode Semiconductor Limited .techcodesemi. 1
T echcode®
White LED Step-up Converter
Pin Assignments
Pin Description
Pin Number Pin Name Description
1 2 3
5 6
SW GND FB
EN
OV ...