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CAT4137TD-T3 PDF预览

CAT4137TD-T3

更新时间： 2024-02-02 06:12:05
品牌 Logo 应用领域
安森美 - ONSEMI 驱动器转换器接口集成电路光电二极管升压转换器
页数 文件大小 规格书
16页 243K
描述
CMOS Boost Converter - White LED Driver

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中文翻译

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CAT4137TD-T3 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active零件包装代码：TSOT
包装说明：VSSOP, TSOP5/6,.11,37针数：5
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：28 weeks 6 days
风险等级：5.25接口集成电路类型：LED DISPLAY DRIVER
JESD-30 代码：R-PDSO-G5JESD-609代码：e3
长度：2.9 mm复用显示功能：NO
功能数量：1区段数：3
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）：260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 (Sn)
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：40
宽度：1.6 mm

CAT4137TD-T3 数据手册

 浏览型号CAT4137TD-T3的Datasheet PDF文件第5页浏览型号CAT4137TD-T3的Datasheet PDF文件第6页浏览型号CAT4137TD-T3的Datasheet PDF文件第7页浏览型号CAT4137TD-T3的Datasheet PDF文件第9页浏览型号CAT4137TD-T3的Datasheet PDF文件第10页浏览型号CAT4137TD-T3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.  
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.  
While in normal operation, the device will comfortably  
deliver up to 30mA of bias current into a string of up to  
5 white LEDs.  
BLOCK DIAGRAM  
V
OUT  
V
IN  
SW  
C1  
C2  
Over Voltage  
Protection  
1MHz  
Oscillator  
–
+
300mV  
V
REF  
Driver  
V
PWM  
&
Logic  
IN  
A
I
1
LED  
+
–
A
2
N
1
R
C
C
Enable  
C
Thermal  
+
–
Shutdown  
& UVLO  
R
S
GND  
SHDN  
Current  
Sense  
FB  
R1  
15Ω  
Doc. No. MD-5012 Rev. C  
8
© 2008 SCILLC. All rights reserved.  
Characteristics subject to change without notice  
1...567891011...16

中文翻译

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