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CAT4137 PDF预览

CAT4137

更新时间： 2024-02-05 15:30:30
品牌 Logo 应用领域
CATALYST 驱动器转换器升压转换器
页数 文件大小 规格书
14页 504K
描述
CMOS Boost Converter- White LED Driver

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中文翻译

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CAT4137 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Obsolete零件包装代码：SOT-23
包装说明：1 MM HEIGHT, SOT-23, 5 PIN针数：5
Reach Compliance Code：not_compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.09
接口集成电路类型：LED DISPLAY DRIVERJESD-30 代码：R-PDSO-G5
JESD-609代码：e0长度：2.9 mm
湿度敏感等级：1复用显示功能：NO
功能数量：1端子数量：5
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：VSSOP
封装等效代码：TSOP5/6,.11,37封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, VERY THIN PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：240
电源：3.6 V认证状态：Not Qualified
座面最大高度：1 mm子类别：Display Drivers
最大供电电压：5.5 V最小供电电压：2.2 V
标称供电电压：3.6 V表面贴装：YES
技术：CMOS温度等级：INDUSTRIAL
端子面层：TIN LEAD端子形式：GULL WING
端子节距：0.95 mm端子位置：DUAL
处于峰值回流温度下的最长时间：30宽度：1.625 mm
Base Number Matches：1

CAT4137 数据手册

 浏览型号CAT4137的Datasheet PDF文件第5页浏览型号CAT4137的Datasheet PDF文件第6页浏览型号CAT4137的Datasheet PDF文件第7页浏览型号CAT4137的Datasheet PDF文件第9页浏览型号CAT4137的Datasheet PDF文件第10页浏览型号CAT4137的Datasheet PDF文件第11页 
CAT4137  
DEVICE OPERATION  
The CAT4137 is a fixed frequency (1MHz),  
low noise, inductive boost converter  
providing constant current to the load. A high  
voltage internal CMOS power switch is used  
to energize the external inductor. When the  
power switch is then turned off, the stored  
energy inductor is released into the load via  
the external Schottky diode.  
While in normal operation, the device will  
comfortably deliver up to 30mA of bias current  
into a string of up to 5 white LEDs.  
In the event of a “Open-Led” fault condition,  
where the feedback control loop becomes open,  
the output voltage will continue to increase. Once  
this voltage exceeds 24V, an internal protection  
circuit will become active and place the device  
into a very low power safe operating mode. In  
addition, an internal clamping circuit will limit the  
peak output voltage to 29V. If this fault condition  
is repaired, the device will automatically resume  
normal operation.  
The on/off duty cycle of the power switch is  
internally adjusted and controlled to maintain  
a constant regulated voltage of 0.3V across  
the external feedback resistor connected to  
the feedback pin (FB). The value of external  
resistor will accurately set the LED bias  
current accordingly (0.3V/R1).  
Thermal overload protection circuitry has been  
included to prevent the device from operating at  
unsafe junction temperatures above 150ºC. In  
the event of a thermal overload condition the  
device will automatically shutdown and wait till  
the junction temperatures cools to 130ºC before  
normal operation is resumed.  
During the initial power-up stage, the duty  
cycle of the internal power switch is limited  
to prevent excessive in-rush currents and  
thereby provide a “soft-start” mode of  
operation.  
BLOCK DIAGRAM  
© 2005 Catalyst Semiconductor, Inc.  
8 of 14  
Doc. 5012 , Rev. A  
Characteristics subject to change without notice  
1...567891011...14

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