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CAT4237TD-T3 PDF预览

CAT4237TD-T3

更新时间： 2024-11-07 03:09:47
品牌 Logo 应用领域
CATALYST 显示驱动器驱动程序和接口接口集成电路光电二极管
页数 文件大小 规格书
14页 301K
描述
High Voltage CMOS Boost White LED Driver

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中文翻译

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CAT4237TD-T3 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：SON包装说明：VSSOP, TSOP5/6,.11,37
针数：5Reach Compliance Code：unknown
ECCN代码：EAR99HTS代码：8542.39.00.01
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湿度敏感等级：1
复用显示功能：NO功能数量：1
区段数：8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：2.8 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：MATTE TIN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
Base Number Matches：1

CAT4237TD-T3 数据手册

 浏览型号CAT4237TD-T3的Datasheet PDF文件第2页浏览型号CAT4237TD-T3的Datasheet PDF文件第3页浏览型号CAT4237TD-T3的Datasheet PDF文件第4页浏览型号CAT4237TD-T3的Datasheet PDF文件第5页浏览型号CAT4237TD-T3的Datasheet PDF文件第6页浏览型号CAT4237TD-T3的Datasheet PDF文件第7页 
CAT4237  
High Voltage CMOS Boost White LED Driver  
FEATURES  
DESCRIPTION  
„ Drives 6 to 8 White LEDs in series from 3V  
„ Up to 87% Efficiency  
„ Low Quiescent Ground Current 0.6mA  
„ Adjustable Output Current (up to 40mA)  
„ High Frequency 1MHz Operation  
„ High Voltage Power Switch  
„ Shutdown current less than 1µA  
„ Open LED low power mode  
„ Automatic Shutdown at 1.9V (UVLO)  
„ Thermal shutdown protection  
„ RoHS-compliant  
The CAT4237 is a DC/DC step-up converter that  
delivers an accurate constant current ideal for driving  
LEDs. Operation at a constant switching frequency of  
1MHz allows the device to be used with small value  
external ceramic capacitors and inductor. LEDs  
connected in series are driven with a regulated current  
set by the external resistor R1. LED currents up to 40mA  
can be supported over a wide range of input supply  
voltages from 2.8V to 5.5V, making the device ideal for  
battery-powered applications. The CAT4237 high-  
voltage output stage is perfect for driving six, seven or  
eight white LEDs in series with inherent current matching  
in LCD backlight applications.  
„ Thin SOT23 5-Lead (1mm max height)  
LED dimming can be done by using a DC voltage, a  
logic signal, or a pulse width modulation (PWM) signal.  
The shutdown input pin allows the device to be placed in  
power-down mode with “zero” quiescent current.  
APPLICATIONS  
„ Color LCD and keypad Backlighting  
„ Cellular Phones  
„ Handheld Devices  
„ Digital Cameras  
In addition to thermal protection and overload current  
limiting, the device also enters a very low power operating  
mode during “Open LED” fault conditions. The device is  
housed in a low profile (1mm max height) 5-lead thin  
SOT23 package for space critical applications.  
„ PDAs  
„ Portable Game Machine  
ORDERING INFORMATION  
Quantity  
per Reel  
Package  
Marking  
For Ordering Information details, see page 13.  
Part Number  
Package  
CAT4237TD-T3 TSOT23-5 (1)  
CAT4237TD-GT3 TSOT23-5 (2)  
3000  
3000  
LT  
UD  
Notes: (1) Matte-Tin Plated Finish (RoHS-compliant).  
(2) NiPdAu Plated Finish (RoHS-compliant).  
PIN CONFIGURATION  
TYPICAL APPLICATION CIRCUIT  
5-Lead Thin SOT23  
(1mm max height)  
L
D
V
OUT  
V
IN  
33µH  
3V to  
4.2V  
C
C
2
1
1
2
3
5
SW  
GND  
FB  
VIN  
4.7µF  
0.22µF  
SW  
VIN  
CAT4237  
SHDN FB  
GND  
4
SHDN  
V
= 300mV  
FB  
20mA  
OFF ON  
R1  
15Ω  
Top View  
L: Sumida CDRH3D16-330  
D: Central CMDSH05-4 (rated 40V)  
C2: Taiyo Yuden UMK212BJ224 (rated 50V)  
© Catalyst Semiconductor, Inc.  
Characteristics subject to change without notice  
1
Doc. No. MD-5013, Rev. B  
1234567...14

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