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PDF VS4101 Data sheet ( Hoja de datos )
| Número de pieza | VS4101 | |
| Descripción | White LED Step-Up Converter | |
| Fabricantes | VSS | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de VS4101 (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
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1 VS4101
White LED Step-Up Converter
General Description
Features
The VS4101 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. Because it directly regulates output
current, the VS4101 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. 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
and QFN8 packages.
· Driver Up to 5 series White LEDs from 2.5V
· Driver Up to 8 series White LEDs from 3.6V
· Up to 87% Efficiency
· Over 1.2MHz Fixed Switching Frequency
· Low 104mV Feedback Voltage
· Open Load Shutdown
· Soft-Start/PWM Dimming
· Internal Current Limit
· SOT23-6 and QFN8 Packages
Applications
· Cellular Phones
· Digital Cameras
· LCD modules
· PDAs, Handheld Computers
Typical Application
Figure 1. Li-Ion Driver for Six White LEDs
Gure 2. Efficiency vs Number of LEDs
Free Datasheet http://www.datasheet4u.com/
1 page  
2
Typical Performance Characteristics
VS4101
White LED Step-Up Converter
Switching Frequency vs Temperature
Free Datasheet http://www.datasheet4u.com/
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet VS4101.PDF ] | |
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