Datasheet > CAT4240

CAT4240

更新时间： 2024-11-07 12:19:55

品牌	Logo	应用领域
安森美 - ONSEMI		驱动器
页数	文件大小	规格书
12页	186K
描述
6 Watt Boost LED Driver

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CAT4240 数据手册

CAT4240

6 Watt Boost LED Driver

Description

The CAT4240 is a DC/DC step−up converter that delivers an accurate

constant current ideal for driving LEDs. Operation at a fixed switching

frequency of 1 MHz 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. The

CAT4240 high−voltage output stage is perfect for driving mid−size and

large panel displays containing up to ten white LEDs in series.

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.

http://onsemi.com

TSOT−23

TD SUFFIX

CASE 419AE

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 (1 mm

max height) 5−lead thin SOT23 package for space critical applications.

PIN CONNECTIONS

VIN

GND

Features

SHDN

• Switch Current Limit 750 mA

• Drives High Voltage LED Strings (38 V)

• Up to 94% Efficiency

• Low Quiescent Ground Current 0.6 mA

• 1 MHz Fixed Frequency Low Noise Operation

• Soft Start “In−rush” Current Limiting

• Shutdown Current Less than 1 mA

• Open LED Overvoltage Protection

• Automatic Shutdown at 1.9 V (UVLO)

• Thermal Overload Protection

(Top View)

MARKING DIAGRAM

TGYM

TG = Specific Device Code

Y = Production Year (Last Digit)

M = Production Month (1−9, A, B, C)

• Thin SOT23 5−lead (1 mm Max Height)

• These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS

Compliant

ORDERING INFORMATION

Device

Package

Shipping

CAT4240TD−GT3

TSOT−23

(Pb−Free)

Green*

3,000/

Tape & Reel

Applications

• GPS Navigation Systems

• Portable Media Players

* NiPdAu Plated Finish

• Handheld Devices, Digital Cameras

VOUT

47 mH

8 V to

16 V

4.7 mF/16 V

1 μF/50 V

VIN

5 V

VIN

1 μF

CAT4240

300 mA

(300 mV)

SHDN

GND

1 kW

1 W

L1: Sumida CDRH6D28−470

D1: Central CMSH1−40 (rated 40 V)

Figure 1. Typical Application Circuit

Publication Order Number:

February, 2010 − Rev. 3

CAT4240/D

12 3 4 5 6 7...12

中文翻译

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与CAT4240相关器件

型号	品牌	获取价格	描述	数据表
CAT4240_0711	CATALYST	获取价格	6 Watt Boost LED Driver
CAT4240TD-GT3	CATALYST	获取价格	6 Watt Boost LED Driver
CAT4240TD-GT3	ONSEMI	获取价格	6 Watt Boost LED Driver
CAT431L	CATALYST	获取价格	Low-Voltage Adjustable Precision Voltage Reference
CAT431LEUK-TE7	CATALYST	获取价格	Low-Voltage Adjustable Precision Voltage Reference
CAT431LEUR-TE7	CATALYST	获取价格	Low-Voltage Adjustable Precision Voltage Reference
CAT431LEZR-TEAP	CATALYST	获取价格	Low-Voltage Adjustable Precision Voltage Reference
CAT48049	ETC	获取价格	GaAs 4 SECTION ATTENUATOR
CAT-5	MINI	获取价格	Fixed Attenuator, 0MHz Min, 1500MHz Max, CASE FF55
CAT-5+	MINI	获取价格	Fixed Attenuator, 0MHz Min, 1500MHz Max, CASE FF55

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