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| 型号： | ZXLD1360ET5TA |
| 厂商： | Diodes Inc |
| 文件页数： | 22/25页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVR WHITE BCKLGT TSOT-5 |
| 特色产品： | LED Driver Solutions |
| 标准包装： | 1 |
| 拓扑： | PWM，降压（降压） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 车载 |
| 类型 - 次要： | 高亮度 LED（HBLED） |
| 频率： | 1MHz |
| 电源电压： | 7 V ~ 30 V |
| 输出电压： | 30V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-5 细型，TSOT-23-5 |
| 供应商设备封装： | TSOT-23-5 |
| 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： | ZXLD1360ET5DKR |
A Product Line of
Diodes Incorporated
ZXLD1360
Application Information (cont.)
Dimming output current using PWM
Low frequency PWM mode
When the ADJ pin is driven with a low frequency PWM signal (eg 100Hz), with a high level voltage VADJ and a low level of
zero, the output of the internal low pass filter will swing between 0V and V ADJ , causing the input to the shutdown circuit to fall
below its turn-off threshold (200mV nom) when the ADJ pin is low. This will cause the output current to be switched on and
off at the PWM frequency, resulting in an average output current I OUT avg proportional to the PWM duty cycle.
(See Figure 3 - Low frequency PWM operating waveforms).
V ADJ
PWM Voltage
Ton
Toff
0V
V ADJ
Filter Output
300mV
200mV
0V
Output Current
IOUTnom
0.1/Rs
IOUTavg
0
Figure 3. Low frequency PWM operating waveforms
The average value of output current in this mode is given by:
I OUT avg = 0.1D PWM /R S [for D PWM >0.01]
This mode is preferable if optimum LED 'whiteness' is required. It will also provide the widest possible dimming range
(approx. 100:1) and higher efficiency at the expense of greater output ripple.
Note that the low pass filter introduces a small error in the output duty cycle due to the difference between the start-up and
shut-down times. This time difference is a result of the 200mV shutdown threshold and the rise and fall times at the output of
the filter. To minimize this error, the PWM frequency should be as low as possible consistent with avoiding flicker in the
LED(s).
ZXLD1360
Document number: DS33471 Rev. 4 - 2
22 of 25
www.diodes.com
March 2011
? Diodes Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ZXLD1360ET5TA-CUT TAPE | 制造商:DIODES 功能描述:ZXLD1360 Series 1 A 1 MHz SMT LED Driver with Internal Switch - TSOT-23-5 |
| ZXLD1362 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:60V 1A LED DRIVER WITH AEC-Q100 |
| ZXLD1362_12 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:60V 1A LED DREIVER WITH AEC-Q100 |
| ZXLD1362ET5TA | 功能描述:LED照明驱动器 1A/60V LED DRIVER 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 |
| ZXLD1362ET5TA-CUT TAPE | 制造商:DIODES 功能描述:ZXLD1362 Series 1 A 1 MHz SMT LED Driver with Internal Switch - TSOT-23-5 |
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