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| 型号： | ZXLD1362ET5TA |
| 厂商： | Diodes Inc |
| 文件页数： | 5/24页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVR WHITE BCKLGT TSOT-5 |
| 特色产品： | LED Driver Solutions ZXLD1362 - Miniature 1A LED Driver |
| 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，背光 |
| 类型 - 次要： | 高亮度 LED（HBLED） |
| 频率： | 500kHz |
| 电源电压： | 6 V ~ 60 V |
| 输出电压： | 60V |
| 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： | ZXLD1362ET5DKR |
A Product Line of
Diodes Incorporated
ZXLD1362
Device Description
The device, in conjunction with the coil (L1) and current sense resistor (R S ), forms a self-oscillating continuous-mode buck converter.
Device operation (refer to Figure 1 - Block diagram and Figure 2 Operating waveforms)
Figure 2. Theoretical Operating Waveforms
Operation can be best understood by assuming that the ADJ
pin of the device is unconnected and the voltage on this pin
(V ADJ ) appears directly at the (+) input of the comparator.
When input voltage V IN is first applied, the initial current in L1
and R S is zero and there is no output from the current sense
circuit. Under this condition, the (-) input to the comparator is at
ground and its output is high. This turns MN on and switches
the LX pin low, causing current to flow from V IN to ground, via
R S , L1 and the LED(s). The current rises at a rate determined
comparator. When this reaches the threshold voltage (V ADJ ),
the comparator output switches low and MN turns off. The
comparator output also drives another NMOS switch, which
bypasses internal resistor R3 to provide a controlled amount of
hysteresis. The hysteresis is set by R3 to be nominally 10% of
V ADJ .
When MN is off, the current in L1 continues to flow via D1 and
the LED(s) back to V IN . The current decays at a rate
determined by the LED(s) and diode forward voltages to
) across R S .
by V IN and L1 to produce a voltage ramp (V
SENSE
produce a falling voltage at the input of the comparator. When
The supply referred voltage V SENSE is forced across internal
resistor R1 by the current sense circuit and produces a
proportional current in internal resistors R2 and R3. This
produces a ground referred rising voltage at the (-) input of the
this voltage returns to V ADJ , the comparator output switches
high again. This cycle of events repeats, with the comparator
input ramping between limits of V ADJ ± 10%.
ZXLD1362
Document number: DS33472 Rev. 5 - 2
5 of 24
www.diodes.com
May 2012
? Diodes Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| ZXLD1366 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:High accuracy 1A, 60V LED driver with internal switch |
| ZXLD1366_10 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:HIGH ACCURACY 1A, 60V LED DRIVER WITH INTERNAL SWITCH |
| ZXLD1366DACTC | 功能描述:LED照明驱动器 1A, 60V LED Drver, Int Swtch 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 |
| ZXLD1366DACTC-CUT TAPE | 制造商:DIODES 功能描述:ZXLD1366 Series 1A 500 kHz High Accuracy LED Driver with Internal Switch - DFN-6 |
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