Microchip MCP2551 Handleiding
Microchip
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MCP2551
Lees hieronder de 📖 handleiding in het Nederlandse voor Microchip MCP2551 (24 pagina's) in de categorie nezařazeno. Deze handleiding was nuttig voor 31 personen en werd door 2 gebruikers gemiddeld met 4.5 sterren beoordeeld
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www.microchip.com/lighting
Intelligent Lighting and Control Solutions
Enabling Innovation in Lighting
Intelligent Lighting Solutions
2Intelligent Lighting and Control Solutions
Intelligent Lighting and Control
Summary
Microchip can meet the technical needs of lighting engineers with its large array of 8-, 16-, 32-bit
PIC® microcontrollers, analog, wireless, and human interface products. With advanced peripheral
integration and support for all lighting technologies, a scalable Microchip solution provides
significant flexibility versus that of a pure analog or ASIC implementation. Designing with
Microchip-based intelligent lighting solutions and control enables innovation that expands lighting
product capabilities and provides product differentiation.
Light-emitting diode (LED) and fluorescent technologies are currently at the forefront of delivering
the most efficient alternatives to incandescent lighting. Although both pose technical challenges,
they also offer significant advantages beyond simple incandescent light bulb replacement,
including improved efficacy (lumens/watt), reduced energy consumption and the ability to
add intelligence.
Because the light quality of these alternate lighting technologies is perceived
to be similar to that of incandescent lighting, the benefits of longer life and
increased energy savings may not always be considered significant enough
to motivate changes in the market. Microchip’s advanced lighting solutions
offer you the opportunity to incorporate non-traditional capabilities into your
lighting designs. Features such as predictive failure and maintenance, energy
monitoring, color and temperature maintenance and remote communications
and control are just some of the advanced capabilities that can make intelligent
lighting solutions more attractive. These advanced capabilities—along with
reduced operating, maintenance and energy costs—can quickly translate to
significant savings, particularly for corporate and commercial facilities.
Value Proposition
Microchip-based lighting solutions provide opportunities to further enhance any lighting application through product
differentiation and an improved user experience.
Learn More
Microchip offers various resources to assist you in your
next product design. Learn more about Intelligent Lighting
and Control solutions from Microchip by visiting us on
the web at: www.microchip.com/lighting or emailing us
at: . lighting@microchip.com
Intelligence
■Communication and networking
■Lumen and color control
■Environmental sensing
■Thermal management
■Predictive failure and maintenance
■Daylight harvesting
■Smooth dimming control
■Color mixing
■Closed loop lighting control
■Remote fault detection
■User interface and control
Flexible Power
■Flexible power topology support
■High effi ciency power conversion
■Failsafe monitoring
■Energy monitoring and control
■Energy harvesting (e.g. solar)
■Battery management and charging
Scalable Design
■Scalable performance
• 8-, 16-, 32-bit PIC MCUs
• Analog products
• Wireless ICs and modules
• Human interface products
■Customizable solutions
■Ease of use
• Easy-to-use development tools
• Reference designs and collateral
• Lighting design
partner specialists
3
Intelligent Lighting and Control Solutions
Lighting Technology Basics
Incandescent Lighting Technology
Advantages Disadvantages
■Cheap
■ Large amounts of visible light
■ No electronics required
■Poor effi ciency
• ~10% input energy = light
• ~90% input energy = radiated heat
• 10–30 lumens/watt (effi cacy)
■ Short life: 1,000–2,000 hours
Incandescent light sources are good at creating large amounts of visible light and even greater
amounts of heat. As a result, a typical light bulb is not very efficient—only about 10% of the
input energy is output as light with the remaining 90% being wasted as radiated heat. The
typical light bulb has a relatively short lifetime—ranging from several hundred to a couple
thousand hours—as the extreme heat of the tungsten causes it to evaporate and eventually fail.
Fluorescent Lighting and HID Technology
Advantages Disadvantages
■Relatively inexpensive
• ~75% less energy than incandescent
• More than 70 lumens/watt (effi cacy)
■ Increased life: > 8,000 hours
■ Typically requires “warm up”
■ Can contain mercury
■ Sensitive to environment and orientation
■Moderate light quality
Typical fluorescent lighting operates by driving a current through a glass enclosure
containing an inert gas and mercury. With the help of phosphors, these elements
create visible light when they are excited by electricity. High intensity discharge (HID) lamps or arc lamps are similar in
function but create visible light through electrically excited gases (plasma) without the use of phosphors. In both glow-
discharge lamps and HID lamps, a ballast is required to initiate and maintain this electrical reaction. The ballast kick-
starts the electrical-gas reaction with a large amount of energy and then regulates the current back down to a normalized
operating current. High-resolution PWM control is required to accurately control this reaction as well as provide smooth
dimming control.
LED Lighting Technology
Advantages Disadvantages
■Best overall effi ciency
• ~25–50% less energy than fl uorescent
• More than 100 lumens/watt (effi cacy)
■ Longest life: > 50,000 hours
■No “warm up”, no radiated heat
■ Good in indoor and outdoor applications
■Requires active or passive thermal
solution to remove conducted heat
Similar to a traditional LED, a High Brightness Light Emitting Diode (HBLED) produces light
when forward biased, enabling the electron-hole recombination that releases light photons.
LED light output is a direct function of the current flow—too little current and the light
will dim, too much current and lifetimes will be shortened. A typical LED driver is a DC power supply providing converted
AC or DC power to directly control the LED via constant current, Pulse Width Modulation (PWM), or other variations. The
LED driver must also provide high efficiencies and power factor correction (PFC) while providing protection from AC line
voltage fluctuations.
LED drivers can be designed to offer dimming and RGBW color mixing capabilities by either providing a high resolution PWM
(or variants such as VFM—Variable Frequency Modulation) signal or varying the constant current.
Constant Current Method
■Light output maintained by constant current level
■Dimming control via varying current level
■Requires high resolution current control
Modulated Current Method
■Fixed current drive chopped by PWM
■Dimming control via varying PWM duty cycle
Power
Conversion
and Control
Current Control
0%
50%
100%
Current
Light Output
Power
Conversion
and Control
PWM Control
Variable PWM Duty Cycle
Product specificaties
| Merk: | Microchip |
| Categorie: | nezařazeno |
| Model: | MCP2551 |
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