Description

The YB1506 is a step-up(Boost) DC-DC converter; operate as current source to drive up to 5 white LEDs in series. Series connecting of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. The light intensity of these LEDs is proportional to the current passing through them. The low off-time permits the use of tiny, low profile inductors and capacitors to minimize footprint and cost in space consideration applications for cellular phone backlighting or other hand held equipment.

Features

Internal switch

Adjustable output voltage up to 22V

2.2V to 6.5V input range

0.1uA shutdown current

Small 5-Lead SOT-23 package

High efficiency

Drives 5 white LEDs

Over voltage protection

Applications

LCD Display Module

White LED Backlighting

PDAs

Digital Cameras

Portable Application

Cellular Phone

Electronic books