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| 型号： | ZXLD1322DCCTC |
| 厂商： | Diodes Inc |
| 文件页数： | 11/17页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVR WHITE BCKLGT 14-DFN |
| 特色产品： | LED Driver Solutions |
| 标准包装： | 1 |
| 拓扑： | PWM，降压（降压），升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 闪灯/白光，通用 |
| 类型 - 次要： | 高亮度 LED（HBLED），白色 LED |
| 频率： | 600kHz |
| 电源电压： | 2.5 V ~ 15 V |
| 输出电压： | 18V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-VFDFN 裸露焊盘 |
| 供应商设备封装： | 14-DFN-EP（4x3） |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 125°C |
| 产品目录页面： | 1478 (CN2011-ZH PDF) |
| 其它名称： | ZXLD1322DCCDKR |
A Product Line of
Diodes Incorporated
ZXLD1322
PWM Control
A wider dimming range can be achieved by applying a PWM control signal to the ADJ pin to turn the device on and off,
giving an average output current proportional to the duty cycle of the control signal. The ADJ pin can be driven directly from
the open drain NMOS output of a microcontroller, or indirectly with a low saturation voltage NPN transistor such as the Zetex
ZXTN25015DFL. (Fig 2).
ZXTN25015DFL
Fig. 2
In the circuit of Fig 4, the average LED output current will be:
I LED (AVG) = I LED (NOM) *D
Where duty cycle
A PWM frequency of 200Hz, or lower is recommended, to minimize errors due to the rise and fall
times of the converter output.
Thermal Compensation of LED Current
High-luminance LEDs often need to be supplied with a temperature compensated current in order to maintain stable and
reliable operation at high temperatures. This is usually achieved by reducing the LED current proportionally from its nominal
set value when the LED temperature rises above a predefined threshold. (Fig.3)
Fig. 3
The 'Thermal compensation current' generator inside the ZXLD1322 provides the necessary thermal compensation current
to meet this requirement, using an NTC thermistor and resistor. (Fig 4)
Fig. 4
ZXLD1322
Document number: DS32166 Rev. 3 - 2
11 of 17
www.diodes.com
April 2010
? Diodes Incorporated
相关PDF资料 |
PDF描述 |
|---|---|
| ZXLD1350ET5TA | IC LED DRIVR WHITE BCKLGT TSOT-5 |
| ZXLD1352ET5TA | IC LED DRIVER HIGH BRIGHT TSOT-5 |
| ZXLD1356DACTC | IC LED DRIVER WHITE BCKLGT 6-DFN |
| ZXLD1360ET5TA | IC LED DRIVR WHITE BCKLGT TSOT-5 |
| ZXLD1362ET5TA | IC LED DRIVR WHITE BCKLGT TSOT-5 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ZXLD1322DCCTC-CUT TAPE | 制造商:DIODES 功能描述:ZXLD1322 Series 15 V 600 kHz 700 mA Buck/Boost Mode DC-DC Converter - DFN-14 |
| ZXLD1322DCTC | 制造商:ZETEX 制造商全称:ZETEX 功能描述:Buck/boost mode DC-DC converter for LED driving with 700mA output and current control |
| ZXLD1350 | 制造商:ZETEX 制造商全称:ZETEX 功能描述:350mA LED driver with internal switch |
| ZXLD1350_07 | 制造商:ZETEX 制造商全称:ZETEX 功能描述:350mA LED driver with internal switch |
| ZXLD1350ET5 | 制造商:Diodes Incorporated 功能描述:LED DRIVER INTERNAL SWITCH SMD 制造商:Diodes Incorporated 功能描述:LED DRIVER, INTERNAL SWITCH, SMD 制造商:Diodes Incorporated 功能描述:IC, LED DRIVER, BUCK, TSOT-23-5; Topology:Buck (Step Down); No. of Outputs:1; Output Current:350mA; Output Voltage:30V; Driver Case Style:TSOT-23; Input Voltage Min:7V; Input Voltage Max:30V; Dimming Control Type:PWM / DC ;RoHS Compliant: Yes |
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