收藏本站
A Product Line of
Diodes Incorporated
ZXLD1360
Application Information (cont.)
Example:
For V IN =12V, L=33μH, rL=0.093, R S =0.1 Ω , R LX =0.15 Ω , V LED =3.6V, I avg =1A and V D =0.49V
t ON = (33e-6 x 0.3)/(12 - 3.6 - 0.693) = 1.28μs
t OFF = (33e-6 x 0.3)/(3.6 + 0.49 + 0.193) = 2.31μs
This gives an operating frequency of 280kHz and a duty cycle of 0.35.
These and other equations are available as a spreadsheet calculator from the Diodes website at www.diodes.com
Note that, in practice, the duty cycle and operating frequency will deviate from the calculated values due to dynamic switching
delays, switch rise/fall times and losses in the external components.
Optimum performance will be achieved by setting the duty cycle close to 0.5 at the nominal supply voltage. This helps to
equalize the undershoot and overshoot and improves temperature stability of the output current.
Diode selection
For maximum efficiency and performance, the rectifier (D1) should be a fast low capacitance Schottky diode with low reverse
leakage at the maximum operating voltage and temperature.
They also provide better efficiency than silicon diodes, due to a combination of lower forward voltage and
reduced recovery time.
It is important to select parts with a peak current rating above the peak coil current and a continuous current rating higher
than the maximum output load current. It is very important to consider the reverse leakage of the diode when operating above
85°C. Excess leakage will increase the power dissipation in the device and if close to the load may create a thermal runaway
condition.
The higher forward voltage and overshoot due to reverse recovery time in silicon diodes will increase the peak voltage on the
LX output. If a silicon diode is used, care should be taken to ensure that the total voltage appearing on the LX pin including
supply ripple, does not exceed the specified maximum value.
ZXLD1360
Document number: DS33471 Rev. 4 - 2
18 of 25
www.diodes.com
March 2011
? Diodes Incorporated
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
ZXLD1362ET5TA IC LED DRIVR WHITE BCKLGT TSOT-5
ZXLD1366DACTC IC LED DRIVER WHITE BCKLGT 6-DFN
ZXLD1370EST16TC IC LED DRVR HIGH BRIGHT TSSOP-16
ZXLD1371QESTTC IC LED DRIVER
ZXLD1374EST20TC IC LED DVR BUCK BOOST 20TSSOP
ZXLD1937ET5TA IC LED DRIVR WHITE BCKLGT TSOT-5
ZXLD381FHTA IC LED DRIVR WHITE BCKLT SOT23-3
ZXLD383ET5TA IC LED DRIVR WHITE BCKLGT TSOT-5
相关代理商/技术参数
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
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