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PT4101

Part Number	PT4101
Manufacturer	Powtech
Description	White LED Step-Up Converter
Published	Jul 21, 2014
Detailed Description	PT4101 White LED Step-Up Converter GENERAL DESCRIPTION The PT4101 is a step-up DC/DC converter designed for driving up t...
Datasheet	PT4101 PDF File

Overview

PT4101 White LED Step-Up Converter GENERAL DESCRIPTION The PT4101 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 PT4101 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 PT4101 is available in SOT23-6 packages.
FEATURES z z z z z z z Drives Up to 5 Series White LEDs from 3V Up to 87% Efficiency 1.
25MHz Fixed Switching Frequency Low 104mV ...

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