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参数资料
| 型号： | AL8807W5-7 |
| 厂商： | Diodes Inc |
| 文件页数： | 16/20页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR DCDC BUCK SOT25 |
| 标准包装： | 1 |
| 恒定电流： | 是 |
| 拓扑： | PWM，降压（降压） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 通用 |
| 类型 - 次要： | 白色 LED |
| 频率： | 1MHz |
| 电源电压： | 6 V ~ 36 V |
| 输出电压： | 36V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 供应商设备封装： | SOT-25 |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 125°C |
| 其它名称： | AL8807W5-7DIDKR |
AL8807
Application Information (cont.)
The associated EMI measurements for this board using the AL8807 is shown in figure 40.
Figure 40 AL8807EV2 Radiated EMI Performance
The EMI performance was measured at 12V DC driving two white LEDs (V F = 3.1V at 660mA) on the AL8807EV2. The red bold line is for EN55022
class B used for domestic equipment including lighting. The bottom magenta line is the noise floor of the test chamber. The middle purple line is the
EMI emitted radiation of the AL8807 over 30MHz to 1000MHz. This shows that the AL8807 passes the standard with at least 16dB margin.
MR16 lamps typically operate from 12V DC or 12V AC , using conventional electromagnetic transformers or electronic transformers.
In enclosed lamps such MR16 the ability for the device to operate at high ambient temperatures is critical and figure 41 shows the surface
temperature of the AL8807 on AL8807EV2 in operation under the same conditions as the EMI tests at an free air temperature of 25°C. It is
anticipated that the internal junction temperature is approximately 6°C hotter than the surface temperature.
Figure 41 Thermal picture of AL8807EV2 at 12V DC 2 white LEDS at 660mA
The thermal image shows that components increasing the board temperature are the inductor, Schottky diodes and the AL8807.
An inductor choice of 33μH with saturation current higher than 1.1A, will limit the frequency variation between 180kHz and 400kHz over the whole
input voltage variation (8V to 18V), and therefore represent the best choice for an MR16 solution also taking into account the size constraint of the
lamp.
The AL8807 guarantees high performance levels with both 12V AC and 12V DC power supplies.
The efficiency is generally higher than 81% and current regulation is better than 0.1mA/V in for a DC input voltage in the range from 8V to 18V.
AL8807
Document number: DS35281 Rev. 5 - 2
16 of 20
www.diodes.com
March 2013
? Diodes Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AL8808EV1 | 功能描述:AL8808 1, Non-Isolated Output LED Driver Evaluation Board 制造商:diodes incorporated 系列:- 零件状态:有效 电流 - 输出/通道:680mA 输出和类型:1，非隔离 电压 - 输出:- 特性:可调光 电压 - 输入:6 V ~ 30 V 所含物品:板 使用的 IC/零件:AL8808 标准包装:1 |
| AL8808EV2 | 功能描述:AL8808 1, Non-Isolated Output LED Driver Evaluation Board 制造商:diodes incorporated 系列:- 零件状态:有效 电流 - 输出/通道:680mA 输出和类型:1，非隔离 电压 - 输出:- 特性:- 电压 - 输入:12VAC，12 V ~ 20 V 所含物品:板 使用的 IC/零件:AL8808 标准包装:1 |
| AL8808WT-7 | 功能描述:LED照明驱动器 LED MV Int Switch TS Switch TSOT25 T&R 3K RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| AL8811 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:Boost/Buck/Inverting DC-DC CONVERTER |
| AL8811M8-13 | 制造商:Diodes Incorporated 功能描述:LED LV INT SWITCH MSOP-8 T&R 2.5K - Tape and Reel 制造商:Diodes Incorporated 功能描述:LED MV INT SWITCH MSOP-8 |
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