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参数资料
| 型号： | AP8800FNG-7 |
| 厂商： | Diodes Inc |
| 文件页数： | 6/13页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER HIGH BRIGHT 10DFN |
| 特色产品： | LED Driver Solutions AP880X Series Step-Down DC/DC Converter |
| 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： | 背光 |
| 类型 - 次要： | 高亮度 LED（HBLED） |
| 频率： | 600kHz |
| 电源电压： | 8 V ~ 28 V |
| 输出电压： | 28V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-UFDFN 裸露焊盘 |
| 供应商设备封装： | DFN3030-10 |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 产品目录页面： | 1138 (CN2011-ZH PDF) |
| 其它名称： | AP8800FNGDIDKR |
AP8800
Application Information (cont.)
LED Current Dimming
The LED current can be dimmed in two ways;
1.
2.
Analog Dimming: Where a dc voltage is applied to the CTRL pin
or
PWM Dimming: Where a Pulse Width Modulated (PWM) signal is applied to the CTRL pin.
Analog Dimming
If the CTRL pin is driven by an external voltage (lower than 2.5V), the average LED current in this case is:
I LED = ×
V CTRL
V REF
V TH
R SET
A DC signal from 0.3V to 2.5V applied to the CTRL pin will vary the LED current from 24% to 200% of nominal LED current. This gives an
approximate 8:1 dimming range; care, should be exercised when overdriving the CTRL pin to 200% of nominal LED current not to exceed the
power dissipation of the package.
The graph in Figure 4 shows values of nominal average output current for 3 values of current setting resistor (R SET ) in the typical application
circuit shown on Figure 1, for different voltages applied on the CTRL pin.
LED current Versus RSET and VCTRL
400
350
0.3
0.56
300
250
200
0.33
0.39
0.47
0.68
0.75
0.82
1
LED current @
VCTRL = 1.25V
LED current @
VCTRL = 2.5V
150
100
50
0
0.3
0.56
0.68
0.39
0.47
0.56
0.68
0.82
0.82
1
1
1.2
1.2
1.2
1.5
1.5
1.5
2
2
2
3
3
3
LED current @
VCTRL = 0.625V
0
0.15 0.3 0.45 0.6 0.75 0.9 1.05 1.2 1.35 1.5 1.65 1.8 1.95 2.1 2.25 2.4 2.55 2.7 2.85
RSET value [Ohms]
Figure 4 LED Current Setting vs. R SET and V CTRL
3
AP8800
Document number: DS31764 Rev. 7 - 2
6 of 13
www.diodes.com
August 2012
? Diodes Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AP8800M8G-13 | 功能描述:LED照明驱动器 28V, 350mA LED DC/DC Converter 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 |
| AP8800SG-13 | 功能描述:LED照明驱动器 28V, 350mA LED DC/DC Converter 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 |
| AP8800SG-13-CUT TAPE | 制造商:DIODES 功能描述:AP8800 Series 350 mA 28 V 600 kHz SMT LED Step-Down Converter - SOIC-8L |
| AP8801 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:500mA LED Step-Down Converter |
| AP8801_0912 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:500mA LED Step-down Converter |
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