Datasheet > CAT3637

CAT3637

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
14页	284K
描述
6-Channel Programmable High Efficiency Quad-Mode⑩ LED Driver

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CAT3637 数据手册

CAT3637

6-Channel Programmable 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 6 LEDs between 30mA and 0mA each

1-wire EZDim^TMinterface with 2mA step

Power efficiency up to 92%

The CAT3637 is a high efficiency Quad-Mode fractional

charge pump that can drive up to six LEDs program-

mable by a 1-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 2.5V to 5.5V.

Short circuit protection

Thermal shutdown protection

Tiny 3mm x 3mm, 16-pad TQFN package

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

digital programming interface for setting the current in the

LED channels. The 1-wire pulse-programming interface

supports 15 linear steps from zero current to 30mA full-

brightness in 2mA steps.

APPLICATIONS

LCD Display Backlight

Cellular Phones

Digital Still Cameras

Handheld Devices

The device is available in a tiny 16-pad TQFN 3 x 3mm

package with a maximum height of 0.8mm.

Catalyst Semiconductor’s Quad-Mode 1.33x, charge pump

switching architecture is patented.

ORDERING INFORMATION

Quantity

per Reel

2000 ⁽¹⁾

Package

Marking

Part Number

For Ordering Information details, see page 13.

CAT3637HV3-GT2

JAAM

Note:

(1) NiPdAu Plated Finish (RoHS-compliant)

16-lead TQFN 3mm x 3mm Package

PIN CONFIGURATION

TYPICAL APPLICATION CIRCUIT

(top view)

1µF

C1-

VIN

C1+ C2-

C2+

16 15 14 13

OUT

VOUT

LED6

LED5

LED4

LED3

12 C2-

2.5V

5.5V

OUT

LED1

LED2

LED3

LED4

LED5

LED6

11 C2+

10 C1-

1µF

CAT3637

1µF

1-Wire

EN/SET

C1+

Programming

GND

Characteristics subject to change without notice

Doc. No. MD-5033 Rev. A

12 3 4 5 6 7...14

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