CAT4237

更新时间： 2024-01-08 03:36:02

品牌	Logo	应用领域
CATALYST		驱动器
页数	文件大小	规格书
13页	533K
描述
High Voltage CMOS Boost White LED Driver

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技术参数
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CAT4237 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, TSOT-23, 5 PIN	针数：	5
Reach Compliance Code：	not_compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.12
Is Samacsys：	N	接口集成电路类型：	LED DISPLAY DRIVER
JESD-30 代码：	R-PDSO-G5	JESD-609代码：	e0
长度：	2.9 mm	湿度敏感等级：	1
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：	3.6 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：	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

CAT4237 数据手册

CAT4237

High Voltage CMOS Boost White LED Driver

Features

Product Description

Drives 6 to 8 White LEDs in series from 3V

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.

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 1mA

Open LED low power mode

Automatic Shutdown at 1.9V (UVLO)

Thermal shutdown protection

Thin SOT23 5-Lead (1mm max height)

Applications

Color LCD and keypad Backlighting

Cellular Phones

Handheld Devices

Digital Cameras

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.

PDAs

Portable Game Machine

Ordering Information

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.

Part

Package

Quantity Package

per Reel Marking

Number

CAT4237TS TSOT23-5

CAT4237TD TSOT23-5

Lead Free¹

3000

Note 1: NiPdAu Lead Plating

Pin Configuration

Typical Application Circuit

Top View

5-Lead Thin SOT23

1mm max height

L: Sumida CDRH3D16-330

D: Central CMDSH05-4 (rated 40V)

C2: Taiyo Yuden UMK212BJ224 (rated 50V)

1 of 13

Doc. No. 5013, Rev. A

Characteristics subject to change without notice

12 3 4 5 6 7...13

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与CAT4237相关器件

型号	品牌	描述	获取价格	数据表
CAT4237_07	CATALYST	High Voltage CMOS Boost White LED Driver	获取价格
CAT4237_08	CATALYST	High Voltage CMOS Boost White LED Driver	获取价格
CAT4237TD	CATALYST	High Voltage CMOS Boost White LED Driver	获取价格
CAT4237TD-GT3	CATALYST	High Voltage CMOS Boost White LED Driver	获取价格
CAT4237TD-GT3	ONSEMI	High Voltage CMOS Boost White LED Driver	获取价格
CAT4237TD-T3	ONSEMI	High Voltage CMOS Boost White LED Driver	获取价格

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