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CAT37EKK-TE7 PDF预览

CAT37EKK-TE7

更新时间: 2024-01-26 15:31:03
品牌 Logo 应用领域
CATALYST 显示驱动器转换器驱动程序和接口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
13页 170K
描述
CMOS White LED Driver Boost Converter

CAT37EKK-TE7 技术参数

是否无铅:含铅是否Rohs认证:不符合
生命周期:Transferred零件包装代码:SOT-23
包装说明:VSSOP, TSOP5/6,.11,37针数:5
Reach Compliance Code:unknownECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.03
Is Samacsys:N接口集成电路类型:LED DISPLAY DRIVER
JESD-30 代码:R-PDSO-G5JESD-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
区段数: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 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:7 V最小供电电压:2.5 V
标称供电电压:3 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
最小 fmax:1.2 MHzBase Number Matches:1

CAT37EKK-TE7 数据手册

 浏览型号CAT37EKK-TE7的Datasheet PDF文件第2页浏览型号CAT37EKK-TE7的Datasheet PDF文件第3页浏览型号CAT37EKK-TE7的Datasheet PDF文件第4页浏览型号CAT37EKK-TE7的Datasheet PDF文件第5页浏览型号CAT37EKK-TE7的Datasheet PDF文件第6页浏览型号CAT37EKK-TE7的Datasheet PDF文件第7页 
E
CAT37  
CMOS White LED Driver Boost Converter  
TM  
FEATURES  
Low quiescent ground current (0.5mA typical)  
Power efficiency over 80%  
Drives up to 4 White LEDs in series  
Shutdown current less than 1µA  
Load fault protection against open-circuits  
Low value external components  
Compatible pinout with LT1937  
Adjustable output current (up to 40mA)  
High frequency 1.2MHz operation  
Input voltage operation down to 2.5V  
Low resistance (0.5) power switch  
Low profile 5-lead SOT23 (1mm max) and  
TDFN (0.8mm) package  
APPLICATIONS  
Color LCD and keypad backlighting  
Cellular phones  
Digital cameras  
PDAs/Games  
Handheld terminals  
Portable MP3 players  
DESCRIPTION  
A high voltage output stage allows up to 4 White LEDs  
to be driven in series. Series drive provides inherent  
current matching.  
The CAT37 is a DC/DC step up converter that delivers  
a regulated output current. Operation at a constant  
switching frequency of 1.2MHz allows the device to be  
used with very small value external inductor and ceramic  
capacitors.  
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 “near zero” quiescent current.  
The CAT37 is targeted to drive multiple white light-  
emitting diodes (LEDs) connected in series and provides  
the necessary regulated current to control the brightness  
and the color purity. An external resistor R1 controls the  
output current level. LED currents of up to 40mA can  
be supported over a wide range of input supply voltages  
from 2.5V to 7V, making the device ideal for battery-  
powered applications.  
In addition to overcurrent limiting protection, the device  
also includes detection circuitry to ensure protection  
against open-circuit load fault conditions.  
The device is available in a low profile (1mm max height)  
5-lead thin SOT23 package and in a TDFN (0.8mm max  
height) package.  
TYPICAL APPLICATION  
D1  
VIN  
3 V to 5 V  
5
1
VIN  
SW  
15mA  
CAT37  
4
3
FB  
SHDN  
OFF ON  
C1: Taiyo Yuden JMK212BJ475  
C2: Taiyo Yuden EMK212BJ105  
GND  
D1: Zetez ZHCS400  
2
L1: Panasonic ELJEA6R8 or equivalent  
SOT23 Pin Numbers  
Figure 1. Driver for Four High-Brightness White LEDs  
© 2004 by Catalyst Semiconductor, Inc.  
Characteristics subject to change without notice  
Doc No. 5005, Rev. R  
1

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