参数资料
型号: ZXLD1322DCCTC
厂商: Diodes Inc
文件页数: 12/17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:
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
The TADJ pin of the device has a voltage threshold of 75mV nominal, which is derived from the reference voltage V REF . If
the voltage (V TADJ ) on the TADJ pin is held above the threshold, the thermal compensation current will be zero and no
thermal compensation is applied. However, if VT ADJ falls below the threshold, a thermal compensation current (ITC) is
produced that is proportional to V TADJ . ITC is injected into the control loop in such a way as to reduce the demand current
I ADJ , causing the control loop to decrease the LED current. The LED current will be reduced to less than 10% of the set
value when V TADJ falls below 50mV.
The threshold voltage has been chosen to set a nominal threshold of 105°C and the device has been optimized to operate
with a standard 103KT1608 thermistor and 5k resistor in the potential divider. Circuit details are given in the application
notes. Alternative thermistor/resistor networks can be used providing the input resistance presented to the device at the
TADJ pin is similar at the threshold temperature. If no LED thermal compensation is required, the TADJ pin should be
connected to V REF to disable this function.
ZXLD1322
Document number: DS32166 Rev. 3 - 2
12 of 17
www.diodes.com
April 2010
? Diodes Incorporated
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