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| 型号： | ZXSC400E6TA |
| 厂商： | Diodes Inc |
| 文件页数： | 7/16页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHITE BCKLGT SOT23-6 |
| 特色产品： | LED Driver Solutions |
| 标准包装： | 1 |
| 恒定电流： | 是 |
| 拓扑： | PWM，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： | 200kHz |
| 电源电压： | 1.8 V ~ 8 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 |
| 供应商设备封装： | SOT-23-6 |
| 包装： | 剪切带 (CT) |
| 工作温度： | -40°C ~ 85°C |
| 产品目录页面： | 1478 (CN2011-ZH PDF) |
| 其它名称： | ZXSC400E6TACT |
ZXSC400
Open-circuit protection
For applications where the LED chain might go
open-circuit a Zener diode can be connected across the
LED chain preventing over-voltage and possible
damage to the main switching transistor. The Zener
diodes should be selected by ensuring its voltage
rating is higher than the combined forward voltage of
the LED chain. Under open circuit conditions the curren
in the Zener diode defines the output current as:
Dimming Control using the shutdown pin
The first method uses the shutdown pin. By injecting a
PWM waveform on this pin and varying the duty cycle,
LED current and hence LED brightness can be adjusted.
To implement this method of brightness control on the
ZXSC400, apply PWM signal with amplitude of
between 0.7V and Vcc at a frequency of 120Hz or above
(to eliminate LED flicker). The LED current and hence
I Z =
V FB
R Z
LED brightness is linearly proportional to the duty cycle
ratio, so for brightness control adjust duty cycle ratio as
necessary. For example, a 10% duty cycle equates to
10% of full LED brightness.
The circuit example below give an open circuit output
current of 300 A.
Dimming Control
There are four types of dimming control that can be
implemented for the ZXSC400.
ISSUE 1 - JANUARY 2003
7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ZXSC400E6TA-CUT TAPE | 制造商:DIODES 功能描述:ZXSC400 Series 50 mA 200 kHz Surface Mount LED Driver Boost Converter - SOT-23-6 |
| ZXSC400EV2 | 制造商:ZETEX 制造商全称:ZETEX 功能描述:circuit diagram and bill of materials |
| ZXSC410 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:VOLTAGE MODE BOOST CONVERTER |
| ZXSC410E6 | 制造商:Diodes Incorporated 功能描述:IC LED DRIVER BOOST CONVERTER SMD |
| ZXSC410E6TA | 功能描述:开关变换器、稳压器与控制器 G.P. Boost W/Shtdwn RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
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