Datasheet > CAT37TDI-TE7

CAT37TDI-TE7

更新时间： 2024-01-13 22:05:52

品牌	Logo	应用领域
CATALYST		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
12页	557K
描述
CMOS White LED Driver Boost Converter

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技术参数
数据手册

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CAT37TDI-TE7 技术参数

是否无铅：	不含铅	是否Rohs认证：	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：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.03
接口集成电路类型：	LED DISPLAY DRIVER	JESD-30 代码：	R-PDSO-G5
JESD-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	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 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：	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：	1.625 mm
Base Number Matches：	1

CAT37TDI-TE7 数据手册

CAT37

CMOS White LED Driver Boost Converter

FEATURES

I Low quiescent ground current (0.5mA typical)

I Power efficiency over 80%

I Drives up to 4 White LEDs in series

I Shutdown current less than 1µA

I Compatible pinout with LT1937

I Load fault protection against open-circuits

I Low value external components

I Adjustable output current (up to 40mA)

I High frequency 1.2MHz operation

I Input voltage operation down to 2.5V

I Low resistance (0.5Ω) power switch

I Low profile 5-lead SOT23 (1mm max) package

APPLICATIONS

I Color LCD and keypad backlighting

I Cellular phones

I Digital cameras

I PDAs/Games

I Handheld terminals

I 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.

TYPICAL APPLICATION

VIN

3 V to 5 V

VIN

15mA

CAT37

SHDN

OFF ON

GND

C1: Taiyo Yuden JMK212BJ475

C2: Taiyo Yuden EMK212BJ105

D1: Zetez ZHCS400

L1: Panasonic ELJEA6R8 or equivalent

SOT23 Pin Numbers

Figure 1. Driver for Four High-Brightness White LEDs

Characteristics subject to change without notice

Doc. No. 5005, Rev. S

12 3 4 5 6 7...12

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