Datasheet > CAT3643

CAT3643

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
CATALYST		驱动器
页数	文件大小	规格书
17页	317K
描述
3-Channel Ultra High Efficiency Quad-Mode TM LED Driver

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CAT3643 数据手册

CAT3643

3-Channel Ultra High Efficiency Quad-Mode™

LED Driver

FEATURES

DESCRIPTION

High efficiency 1.33x charge pump

Quad-mode charge pump: 1x, 1.33x, 1.5x, 2x

Drives up to 3 LEDs at 32mA each

1-wire EZDim™ LED current programming

Power efficiency up to 92%

The CAT3643 is a high efficiency quad-mode

fractional charge pump that can drive up to three

LEDs programmable by a one wire digital interface.

The inclusion of a 1.33x fractional charge pump mode

increases device efficiency by up to 10% over

traditional 1.5x charge pumps with no added external

capacitors.

Low noise input ripple in all modes

“Zero” current shutdown mode

Soft start and current limiting

Low noise input ripple is achieved by operating at a

constant switching frequency which allows the use of

small external ceramic capacitors. The multi-fractional

charge pump supports a wide range of input voltages

from 2.4V to 5.5V.

Short circuit protection

Thermal shutdown protection

Tiny 12-lead XQFN, 12-lead TDFN and 16-lead

The EN/DIM logic input functions as a chip enable and

a digital dimming interface for current setting of all

LEDs. Six different current ratios are available via the

interface.

TQFN packages

APPLICATION

LCD Display Backlight

Cellular Phones

The device is available in the tiny 12-lead XQFN 2.5 x

2.5mm with max height of 0.4mm or in 16-lead TQFN

or 12-lead TDFN 3mm x 3mm package with a max

height of 0.8mm.

Digital Still Cameras

Handheld Devices

The 1.33x charge pump architecture with two fly

capacitors is patent pending.

ORDERING INFORMATION

Part

Package

Marking

Number

Package

CAT3643HV2-T2 TDFN-12 3 x 3mm⁽¹⁾

CAT3643HV3-T2 TQFN-16 3 x 3mm⁽¹⁾

CAT3643HL1-T2 XQFN-12 2.5 x 2.5mm⁽¹⁾

HABF

JAAE

TYPICAL APPLICATION CIRCUIT

1µF

Notes:

(1) Matte-Tin Plated Finish (RoHS-compliant)

(2) Quantity per reel is 2000

C1+

C1- C2+

C2-

White LEDs

OUT

2.4V

5.5V

OUT

For Ordering Information details, see page 16.

1µF

CAT3643

1-Wire

EZDim^TMꢀ

EN/DIM

RSET

LED1

LED2

LED3

20mA

Programming

3.8kΩ

GND

Characteristics subject to change without notice

Doc. No. 5022, Rev. B

12 3 4 5 6 7...17

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与CAT3643相关器件

型号	品牌	描述	获取价格	数据表
CAT3643_0710	CATALYST	3-Channel Ultra High Efficiency Quad-Mode⑩ LE	获取价格
CAT3643HL1-T2	ONSEMI	3-Channel Ultra High Efficiency Quad-Mode LED Driver	获取价格
CAT3643HL1-T2	CATALYST	3-Channel Ultra High Efficiency Quad-Mode TM LED Driver	获取价格
CAT3643HV2-GT2	ONSEMI	3-Channel Ultra High Efficiency Quad-Mode LED Driver	获取价格
CAT3643HV2-GT2	CATALYST	3-Channel Ultra High Efficiency Quad-Mode⑩ LE	获取价格
CAT3643HV2-T2	ONSEMI	3-Channel Ultra High Efficiency Quad-Mode LED Driver	获取价格