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| 型号： | AP8801SG-13 |
| 厂商： | Diodes Inc |
| 文件页数： | 11/14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 |
| 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： | AP8801SGDIDKR |
AP8801
500mA LED STEP-DOWN CONVERTER
Application Information (cont.)
Package Selection
The device comes with a wide selection of packages. The suggested package is able to provide a case temperature below 70 ? C (with an
ambient temperature of +25°C) for the combination of input voltage and load requested.
12 LEDs
I LED = 500mA
L = 100μH
10 LEDs
8 LEDs
6 LEDs
4 LEDs
2 LEDs
MSOP-8
SO-8
SO-8
8
12
16
20
24
28
32
36
40
44
48
Figure. 21 Package Section
Fault Condition Operation
The AP8801 has by default open LED protection. If the LEDs should become open circuit the AP8801 will stop oscillating; the SET pin will
rise to V IN and the SW pin will then fall to GND. No excessive voltages will be seen by the AP8801.
If the LEDs should become shorted together the AP8802H will continue to switch however the duty cycle at which it will operate will change
dramatically and the switching frequency will most likely decrease. The on-time of the internal power MOSFET switch will be significantly
reduced because almost all of the input voltage is now developed across the inductor. The off-time will be significantly increased because the
reverse voltage across the inductor is now just the Schottky diode voltage (See Figure 20) causing a much slower decay in inductor current.
During this condition the inductor current will remain within its controlled levels and so no excessive heat will be generated within the
AP8801.
Figure. 22 Switching Characteristics
(normal open to short LED chain)
AP8801
Document number: DS31765 Rev. 7 - 2
11 of 14
www.diodes.com
June 2012
? Diodes Incorporated
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相关代理商/技术参数 |
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|---|---|
| AP8802 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:1A LED Step-down Converter |
| AP8802_0912 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:1A LED Step-down Converter |
| AP8802EV1 | 功能描述:AP8802 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:700mA 输出和类型:1，非隔离 电压 - 输出:- 特性:可调光 电压 - 输入:8 V ~ 45 V 所含物品:板 使用的 IC/零件:AP8802 标准包装:1 |
| AP8802EV2 | 功能描述:AP8802 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:1A 输出和类型:1，非隔离 电压 - 输出:- 特性:可调光 电压 - 输入:8 V ~ 45 V 所含物品:板 使用的 IC/零件:AP8802 标准包装:1 |
| AP8802EV3 | 功能描述:AP8802 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:1A 输出和类型:1，非隔离 电压 - 输出:- 特性:可调光 电压 - 输入:8 V ~ 45 V 所含物品:板 使用的 IC/零件:AP8802 标准包装:1 |
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