收藏本站
A Product Line of
Diodes Incorporated
ZXLD1322
ADJ pin
The ADJ pin is connected to the internal 500mV reference (V REF ) via a 100k resistor. This biases the ADJ pin to the
reference voltage and defines nominal 100% LED current.
The ADJ pin can be overdriven with an external dc voltage between 50mV and 500mV to reduce the LED current
proportionally between 10% and 100% of the nominal value.
LED current can also be adjusted by applying a low frequency PWM signal to the ADJ pin to turn the device On and Off.
This will produce an average output current proportional to the duty cycle of the control signal.
The device can be shut down by shorting the ADJ pin to ground, or pulling it to a voltage below 28mV with a suitable open
collector NPN or open drain NMOS transistor. In the shutdown state, most of the circuitry inside the device is switched off
and residual quiescent current will be typically 12 μ A.
Thermal control of LED current
The 'Thermal compensation current' circuit produces a sourcing current (Itc) which is zero for voltages above 75mV on T ADJ
and increases to 100 μ A when T ADJ falls to 50mV. This current is summed into the control node and subtracted from the
demand current, causing LED current to reduce from 100% down to zero over this input range. The potential divider,
consisting of a fixed resistor Rt and an NTC Thermistor Rth between V REF and ground, defines the voltage on T ADJ and sets
the threshold temperature. Further details are given in the application notes.
The Thermal Control feature can be disabled by leaving the T ADJ pin floating, or by connecting it to VREF.
Over-temperature shutdown
The ZXLD1322 incorporates an over-temperature shutdown circuit to protect the device against damage caused by excess
die temperature, resulting from excessive power dissipation in the switch. The output of the 'Over-temp Shutdown' circuit will
go high when the die temperature exceeds 150°C (nominal). This will turn off the drive to the switch during normal operation.
Operation will resume when the device has cooled to a safe level.
ZXLD1322
Document number: DS32166 Rev. 3 - 2
9 of 17
www.diodes.com
April 2010
? 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
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
ZXLD1366DACTC IC LED DRIVER WHITE BCKLGT 6-DFN
ZXLD1370EST16TC IC LED DRVR HIGH BRIGHT TSSOP-16
ZXLD1371QESTTC IC LED DRIVER
相关代理商/技术参数
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
ZXLD1350ET5TA 功能描述:LED照明驱动器 7-30V Input 350mA w/Internal Switch 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
ZXLD1350ET5TA-CUT TAPE 制造商:DIODES 功能描述:ZXLD1350 Series 350 mA 1 MHz SMT LED Driver with Internal Switch - TSOT-23-5
ZXLD1350EV3 制造商:ZETEX 制造商全称:ZETEX 功能描述:circuit diagram and bill of materials