收藏本站
A Product Line of
Diodes Incorporated
ZXLD1362
Application Information (cont.)
Shutdown Mode
Taking the ADJ pin to a voltage below 0.2V for more than
approximately 100μs will turn off the output and supply current
to a low standby level of 20μA nominal.
Note that the ADJ pin is not a logic input. Taking the ADJ pin to
a voltage above V REF will increase output current above the
100% nominal average value. (See page 18 graphs for details).
16
14
12
10
8
6
4
2
0
Soft-Start
An external capacitor from the ADJ pin to ground will provide a
soft-start delay, by increasing the time taken for the voltage on
this pin to rise to the turn-on threshold and by slowing down the
rate of rise of the control voltage at the input of the comparator.
Adding capacitance increases this delay by approximately
200μs/nF. The graph to the left shows the variation of soft-start
time for different values of capacitor.
Actual Operating Waveforms [V IN = 24V, R S = 0.1 ? ,
L = 68μH, 22nF on ADJ]
Soft-start operation. Output current (Ch2) and LX voltage (Ch1)
-2
0
20
40 60
80 100
120
CAPACITANCE (nF)
Soft Start Time vs. Capacitance from
ADJ Pin to Ground
V IN Capacitor Selection
A low ESR capacitor should be used for input decoupling, as
the ESR of this capacitor appears in series with the supply
source impedance and lowers overall efficiency. This capacitor
has to supply the relatively high peak current to the coil and
smooth the current ripple on the input supply.
To avoid transients into the IC, the size of the input capacitor
will depend on the V IN voltage:
V IN = 6 to 40V C IN = 2.2 μ F
V IN = 40 to 50V C IN = 4.7 μ F
V IN = 50 to 60V C IN = 10 μ F
When the input voltage is close to the output voltage the input
current increases which puts more demand on the input
capacitor. The minimum value of 2.2 μ F may need to be
increased to 4.7 μ F; higher values will improve performance at
lower input voltages, especially when the source impedance is
high. The input capacitor should be placed as close as possible
to the IC.
For maximum stability over temperature and voltage,
capacitors with X7R, X5R, or better dielectric is recommended.
Capacitors with Y5V dielectric are not suitable for decoupling in
this application and should NOT be used.
If higher voltages are used and the C IN is 10 μ F. This can be an
electrolytic capacitor provide a suitable 1μF ceramic capacitor
is also used and positioned as close the V IN of the IC as
possible.
A suitable capacitor would be NACEW100M1006.3x8TR13F.
The following web sites are useful when finding alternatives:
www.murata.com
www.niccomp.com
www.kemet.com
ZXLD1362
Document number: DS33472 Rev. 5 - 2
18 of 24
www.diodes.com
May 2012
? 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
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
ZXSC300E5TA IC LED DRVR WHITE BCKLGT SOT23-5
相关代理商/技术参数
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
ZXLD1366EN8TC 功能描述:电流和电力监控器、调节器 LED DRVR W/ INT SW 1A 60V RoHS:否 制造商:STMicroelectronics 产品:Current Regulators 电源电压-最大:48 V 电源电压-最小:5.5 V 工作温度范围:- 40 C to + 150 C 安装风格:SMD/SMT 封装 / 箱体:HPSO-8 封装:Reel
ZXLD1366ET5TA 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
ZXLD1370 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:60V HIGH ACCURACY BUCK/BOOST/BUCK-BOOST LED DRIVER CONTROLLER