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参数资料
| 型号： | ZXLD1322DCCTC |
| 厂商： | Diodes Inc |
| 文件页数： | 10/17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
Application Notes
Setting Peak Coil Current
The peak current in the coil is set by the resistor (RSENSE) between the switch emitter and ground according to:
I SWPEAK
=
50mV
R SENSE
The minimum peak current will depend on operating mode, coil inductance and supply voltage range. The maximum peak
current must not exceed the specified value for the switch. (See Application circuits for details)
Setting LED Current
The nominal average LED current is given by:
I LED (NOM) =
100mV
R M
Where RM is the external resistor connected between pins M_VIN and VIN.
This current can be adjusted to a lower value by applying a dc control voltage or PWM control signal to the ADJ pin.
DC Control
The LED current can be adjusted over a 10% to 100% range by connecting a variable resistor R ADJ from the ADJ pin to
ground to vary the DC voltage at the ADJ pin. R ADJ forms the lower part of a resistive divider and the internal 100k ? resistor
between the ADJ and V REF pins forms the upper part. A value of 1M ? for R ADJ will therefore give a maximum current of
91% of I LED (nom) and the device will be turned off when the voltage on the ADJ pin falls below 28mV, corresponding to an
R ADJ value of approximately 5k ? . If required, an end-stop resistor in series with R ADJ can be used to maintain the voltage on
the ADJ pin above the turn-on threshold.
Using a logarithmic potentiometer for RADJ will give an approximately linear variation of output current with shaft rotation.
(Fig 1)
If required, the maximum output current can be restored to 100% by adjusting the value of the LED current monitor resistor
(RM). The tolerance of the internal 100k resistor and R ADJ should be taken into account when calculating output current.
The ADJ pin is clamped internally to a voltage of 575mV (nom), to limit maximum average output current to approximately
115% of I LED (nom).
Fig. 1
ZXLD1322
Document number: DS32166 Rev. 3 - 2
10 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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