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| 型号： | AP8802SPG-13 |
| 厂商： | Diodes Inc |
| 文件页数： | 12/19页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER HIGH BRIGHT 8SOIC |
| 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： | 500kHz |
| 电源电压： | 8 V ~ 48 V |
| 输出电压： | 48V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOP-EP |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 105°C |
| 产品目录页面： | 1138 (CN2011-ZH PDF) |
| 其它名称： | AP8802SPGDIDKR |
AP8802
1A LED STEP-DOWN CONVERTER
Application Information (cont.)
Soft-Start
An external capacitor from the CTRL pin to ground will provide a soft-start delay, by increasing the time taken for the voltage on this pin to
rise to the turn-on threshold and by slowing down the rate of rise of the control voltage at the input of the comparator. Adding capacitance
increases this delay by approximately 200μs/nF. The graph below shows the variation of soft-start time for different values of capacitor.
16
14
12
10
8
6
4
2
0
-2
0
20
40 60 80 100 120
CAPACITANCE (nF)
Figure. 21 Soft-Start Time vs. Capacitance
from ADJ Pin to Ground
Thermal Considerations
The graph below in Figure 22, gives details for power derating. This assumes the device to be mounted on a 25x25mm PCB with 1oz copper
standing in still air.
2.6
2.4
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
SO-8
U-DFN3030-10
SO-8EP
AP8802
Document number: DS31766 Rev. 9 - 2
0.0
0
25 50 75 100
AMBIENT TEMPERATURE ( ° C)
Maximum Power Dissipation
Figure. 22 A P 8802 Derating Curves
12 of 19
www.diodes.com
125
May 2012
? Diodes Incorporated
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