参数资料
| 型号： | APGRD004 |
| 厂商： | Microchip Technology |
| 文件页数： | 3/20页 |
| 文件大小： | 0K |
| 描述： | REF DESIGN MOD AUTO AMBNT LIGHT |
| 产品培训模块： | Microchip MCP20xx LIN Transceiver Overview |
| 标准包装： | 1 |
| 主要目的： | 照明，RGB LED 控制器 |
| 嵌入式： | 是，MCU，8 位 |
| 已用 IC / 零件： | MCP2021，PIC12F615 |
| 主要属性： | 4 Tiny 板，每个板带：RGB LED，LIN 收发器，稳压器，MCU |
| 次要属性： | 对 LIN 指令加以解释，以控制 16,383 种颜色和 1,023 种调光级 |
| 已供物品： | 4 个板，CD |
| 产品目录页面： | 659 (CN2011-ZH PDF) |
| 相关产品： | PIC12F615-I/MF-ND - IC PIC MCU FLASH 1KX14 8DFN PIC12F615T-I/MF-ND - IC PIC MCU FLASH 1KX14 8DFN PIC12F615-E/MF-ND - IC PIC MCU FLASH 1KX14 8DFN MCP2021T-500E/SNTR-ND - IC LIN TXRX ON-BOARD VREG 8SOIC MCP2021T-500E/MDTR-ND - IC LIN TXRX ON-BOARD VREG 8DFN MCP2021T-330E/SNTR-ND - IC LIN TXRX ON-BOARD VREG 8SOIC MCP2021T-330E/MD-ND - IC LIN TXRX ON-BOARD VREG 8DFN MCP2021-500E/SN-ND - IC LIN TXRX ON-BOARD VREG 8SOIC MCP2021-500E/P-ND - IC LIN TXRX ON-BOARD VREG 8DIP MCP2021-500E/MD-ND - IC LIN TXRX ON-BOARD VREG 8DFN 更多... |
LED Lighting Solutions
LED Lighting
LEDs are no longer used just for providing the pretty red and
green indicator lights on electronic equipment. Advances
in technology have allowed LEDs to be used as practical
sources of illumination. The primary benefits of LEDs are
long life, durability and efficiency. When driven properly, a
power LED can last tens of thousands of hours without a
degradation of light output. The typical efficacy of a power
LED, measured in lumens per watt, is 40-80. This is several
times greater than incandescent light sources and is only
exceeded by fluorescent light sources. Since the LED is a
solid-state device, it can withstand shock and vibration that
would damage a filament bulb.
LED Applications
The benefits of LED lighting are helpful in many types of
lighting applications:
■ ? Automotive and aircraft cabin lighting
■ ? Automotive and aircraft instrument panel lighting
■ ? Architectural emergency exit lighting
■ ? Architectural color effect lighting
■ ? Industrial and outdoor lighting
■ ? Traffic and railway signals
■ ? Automotive brake lights
■ ? Dot matrix signs and video displays
■ ? LCD display backlighting
■ ? Personal flashlights
■ ? Medical instrument and tool lighting
■ ? Digital camera flash and video light
Efficient LED Control
LEDs must be driven with a source of constant current. Most
LEDs have a specified current level that will achieve the
maximum brightness for that LED without premature failures.
An LED could be driven with a linear voltage regulator
configured as a constant current source. However, this
approach is not practical for higher power LEDs due to power
dissipation in the regulator circuit. A switch-mode power
supply (SMPS) provides a much more efficient solution to
drive the LED.
An LED will have a forward voltage drop across its terminals
for a given current drive level. The power supply voltage and
the LED forward voltage characteristics determine the SMPS
topology that is required. Multiple LEDs can be connected
in series to increase the forward voltage drop at the chosen
drive current level.
The SMPS circuit topologies adopted to regulate current
in LED lighting applications are the same used to control
voltage in a power supply application. Each type of SMPS
topology has its advantages and disadvantages as presented
in the table below.
This design guide presents two types of LED driver solutions.
First, an analog driver IC can be used independently or
together with a MCU for added intelligence. Second, the LED
drive function can be integrated into the MCU application.
Literature on the Web
■ AN1114 – Switch Mode Power Supply (SMPS)
Topologies (Part I), DS01114
■ AN1207 – Switch Mode Power Supply (SMPS)
Topologies (Part II), DS01207
Common SMPS Topologies Useful for LED Lighting
Regulator
Topology
Charge Pump
Buck
Boost
V IN to V OUT
Relationship
-V OUT < V IN < V OUT
V IN > V OUT
V IN < V OUT
Complexity
Low
Medium
Medium
Component
Count
Medium
Medium
Medium
Comments
– Limited I OUT range
– No inductors
– Chopped I IN
– High side drive
– Extra parts needed to isolate
output from input
– Smooth I IN
SEPIC
V OUT < V IN < V OUT
Medium
High
– Multiple outputs
– Two inductors
Buck-Boost
Flyback
www.microchip.com/lighting
V OUT < V IN < V OUT
Depends on
transformer
Medium
Medium
Medium
Medium
– Single inductor
– Up to four switches
– Transformer can provide electrical
isolation
– Multiple outputs possible
LED Lighting Solutions Design Guide
3
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| AS168X-CB2F200N | CIRCUIT BRKR THERMAL 20A 2POLE |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| APGSABA | 制造商:OMRON AUTOMATION AND SAFETY 功能描述:CUSTOM SHUTTER ASSEMBLY 制造商:OMRON Industrial Automation 功能描述:CUSTOM SHUTTER ASSEMBLY |
| APG-SA-BA | 制造商:OMRON AUTOMATION AND SAFETY 功能描述:CUSTOM SHUTTER ASSEMBLY 制造商:OMRON Industrial Automation 功能描述:CUSTOM SHUTTER ASSEMBLY 制造商:Omron Corporation 功能描述:Custom Shutter Assembly 制造商:OMRON INDUSTRIAL AUTOMATION 功能描述:Custom Shutter Assembly |
| AP-GT1-1P-2428/1.6C(90) | 制造商:Hirose 功能描述:AP-GT1-1P-2428/1.6C(90) |
| APGT1-1P-2428/1.6C(91 | 制造商:Hirose 功能描述:APGT1-1P-2428/1.6C(91 |
| APGT1-1P-2428/1.6C-WS(61) | 制造商:Hirose 功能描述:APGT1-1P-2428/1.6C-WS(61) |
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