High Power LED Flashlight Demonstration Brochure0 pages

High Power LED Flashlight Demonstration
Intelligent Lighting & Control Solutions
Summary
Portable flashlights have been one
of the earliest adopters of LEDs,
and LED based flashlights are
now the most prevalent solutions
available on the market. However,
many of these designs use simple
resistor circuits that contribute
to poor LED performance,
decreased functionality, and
diminished lifetimes.
Industrial, military, and sport flashlight designers are
some of the growing number of engineers recognizing the
advanced control and functionality that a microcontroller
(MCU) provides. With significantly longer lifetimes and
better efficiencies than an incandescent bulb, LED lighting
turns on instantly without any warm-up, provides accurate
light placement, produces no radiated heat, and can
perform well in both indoor and outdoor applications. The
addition of an MCU powering & managing the LED provides
opportunities for control of custom lighting patterns/
sequencing, user interface control, and increased efficacy
(lm/W) resulting in longer battery life at greater lumen
output. Additionally, an MCU implementation benefits
from the ability to modify or add functionality via a simple
program update versus a hardware redesign.
The High Power LED Flashlight Demonstration is a
collaborative platform showcasing the capabilities of
Microchip, Cree®, Airspeed, and Energizer® The 10W,
.
> 1000 lumen premium flashlight, features a Microchip
MCP1703, MCP14628 and PIC12F752 controlling
a > 90% efficient buck power supply dropping 7.2V,
supplied by Energizer® Ultimate Lithium batteries, to
3.3V/3.0A driving a single Cree XLamp® XM-L LED. The
entire assembly fits inside an aluminium hard anodized
enclosure, provided by Airspeed LLC, and is fully
ruggedized for use in most any environment. With 1000
lumens at 10W, light output is approximately half of a
single automotive headlamp while maintaining greater
than 100 (lm/W) efficacy for efficient operation.
To learn more about additional products and capabilities
of Microchip’s lighting partners, visit:
www.CREE.com
www.energizer.com
www.AirSpeedLLC.com

1000 Lumen
XM-L LED
Provided by
CREE® LED

Ultimate Lithium Batteries
Provided by
Energizer
®

Mechanics, Optics,
and Thermal Solution
Provided by AirSpeed

PIC12F752, MCP1703, MCP14628,
and Reference Design
Provided by Microchip

Demonstration Highlights

■ > 90% efficient buck power supply
■ ~1000 lumen output at 10W
•    ~100 (lm/W) efficacy
■ Ruggedized anodized aluminum enclosure
•    Waterproof to 10 meters
■ Magnetic rotational mode selector ring
■ Multiple operating modes
•    Low power (60 lumens at 0.6W)
•    Medium power (200 lumens at 2W)
•    High power (1000 lumens at 10W)
•    SOS (customized lighting sequence)
■ Long life operation
•    Low power = 31 hours at 0.6W
•    Medium power = 8.5 hours at 2W
•    High power = 1.5 hours at 10W
■ Storage/operating temperature: -40°C to +85°C

Resources
The High Power LED Flashlight Demonstration collateral
is available as a FREE download that includes all
schematics and ‘C’ source code that can easily be
modified to your specific application needs—download at
www.microchip.com/HPLEDFlashlight. To learn more about
Microchip’s lighting oriented products and solutions, go to
www.microchip.com/lighting.