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| 型号： | ZXSC380FHTA |
| 厂商： | Diodes Inc |
| 文件页数： | 6/10页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHITE BCKLGT SOT23-3 |
| 特色产品： | LED Driver Solutions |
| 标准包装： | 1 |
| 恒定电流： | 是 |
| 拓扑： | 升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光，闪灯/白光 |
| 类型 - 次要： | 高亮度 LED（HBLED），白色 LED |
| 频率： | 160kHz |
| 电源电压： | 0.8 V ~ 6 V |
| 输出电压： | 20V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | TO-236-3，SC-59，SOT-23-3 |
| 供应商设备封装： | SOT-23-3 |
| 包装： | 标准包装 |
| 工作温度： | 0°C ~ 85°C |
| 产品目录页面： | 1478 (CN2011-ZH PDF) |
| 其它名称： | ZXSC380FHDKR |
ZXSC380
Application notes
Typical application circuit
Figure 2 shows a typical boost circuit for 18mA LED current from a single cell 1.5V supply. The
inductor value is 100 H. The operating frequency is typically 160kHz typical for 1.5V supply.
V IN
1
V CC
L1
100uH
ZXSC380
V OUT 2
GND
3
LED1
GND
Figure 2 Typical application circuit
The LED current can be set by the choice of inductor values described below.
Inductor selection and current setting
Figure 3 shows the LED current vs the supply voltage while Figure 4 shows the switching
frequency vs the supply voltage for various inductor values. Figure 3 and 4 can be used as guides
to the inductor value selection. The inductor should have a low DC resistance for high efficiency.
The switching frequency is dependent on the programmed peak current, the input voltage, the
input to output voltage differential and the inductor value.
LED Current vs Supply Voltage
for L = 22, 47, 68 & 100uH
20
18
16
14
12
10
8
6
4
2
0
1
1.1
1.2
1.3
1.4
1.5
Supply Voltage Vvcc (V)
L = 100uH
L = 68uH
L = 47uH
L = 22uH
Figure 3 The LED current vs the supply voltage for various inductor values
Issue 3 - September 2007
? Zetex Semiconductors plc 2007
6
www.zetex.com
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相关代理商/技术参数 |
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| ZXSC400 | 制造商:ZETEX 制造商全称:ZETEX 功能描述:LED DRIVER BOOST CONVERTER |
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| ZXSC400E6TA | 功能描述:LED照明驱动器 Reg Bst LED Drvr 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 |
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