The PT4103 is a step-up DC/DC converter designed for driving up to 8 white LEDs in series from a single cell Lithium Ion battery with constant current.
Key Features
z z z z z z z z Drives Up to 5 Series White LEDs from 2.5V Drives Up to 8 Series White LEDs from 3.6V Up to 87% Efficiency 1.2MHz Fixed Switching Frequency Low 104mV Feedback Voltage Open Load Shutdown Soft Start/PWM Dimming SOT23-6 Packages.
Full PDF Text Transcription for PT4103 (Reference)
Note: Below is a high-fidelity text extraction (approx. 800 characters) for
PT4103. For precise diagrams, tables, and layout, please refer to the original PDF.
PT4103 White LED Step-Up Converter GENERAL DESCRIPTION The PT4103 is a step-up DC/DC converter designed for driving up to 8 white LEDs in series from a single cell Lithiu...
View more extracted text
ned for driving up to 8 white LEDs in series from a single cell Lithium Ion battery with constant current. Because it directly regulates output current, the PT4103 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 5mA and 20mA, which can then be easily adjusted using either a DC voltage or a pulse width modulated (PWM) signal. Its low 104mV feedback voltage reduces power loss and improves efficiency.
PT4103 Datasheet
