Datasheet > CAT3626_08

CAT3626_08

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
15页	250K
描述
6-Channel LED Driver with I2C⑩ Interface

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CAT3626_08 数据手册

CAT3626

6-Channel LED Driver with I²C™ Interface

FEATURES

PRODUCT DESCRIPTION

Drives 6 LED channels

The CAT3626 is a high efficiency 1x/1.5x fractional

charge pump with programmable dimming current in

six LED channels. To ensure uniform brightness in

LCD backlight applications, each LED channel delivers

an accurate regulated current.

Independent current on 3 pairs of LEDs

I²C serial interface programming

Adjustable current to 32mA in 0.5mA step

Power efficiency up to 91%

Fractional pump 1x/1.5x

Low noise input ripple

Fixed High Frequency Operation 1MHz

“Zero” Current Shutdown Mode

Soft start and current limiting

Short circuit protection

Low noise and input ripple is achieved by operating at

a constant switching frequency of 1MHz which allows

the use of small external ceramic capacitors. The

1x/1.5x fractional charge pump supports a wide range

of input voltages from 3V to 5.5V with efficiency up to

91%, and is ideal for Li-Ion battery powered devices.

Thermal shutdown protection

The LED channels are configured into three indepen-

dent pairs, each containing 2 matched channels. Each

pair can be separately programmed from zero to 32mA,

in 0.5mA resolution steps, using the I²C serial interface.

Any individual channel can be disabled while others

remain active. When the enable input (EN) is low, the

device is in shutdown mode drawing zero current.

APPLICATIONS

RGB LEDs

LCD and keypad Backlighting

Cellular Phones, PDAs

Digital Cameras

The device is available in a 16-pad TQFN package

with a max height of 0.8mm.

ORDERING INFORMATION

Quantity Package

per Reel Marking

Part Number

Package

CAT3626HV4-T2 TQFN-16 ⁽¹⁾

CAT3626HV4-GT2 TQFN-16 ⁽²⁾

2000

G626

CDAJ

For Ordering Information details, see page 14.

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

(2) NiPdAu Plated Finish (RoHS-compliant)

TYPICAL APPLICATION CIRCUIT

PIN CONFIGURATION

TQFN 16-pad 4 x 4mm

(Top View)

1µF

LEDA2 LEDB1 LEDB2 LEDC1

C1-

VIN

C1+ C2-

C2+

pair A

pair B

pair C

VOUT

LEDA1

SDA

SCL

LEDC2

GND

C2+

3V to

5.5V

CAT3626

OUT

LEDA1

LEDA2

LEDB1

LEDB2

LEDC1

LEDC2

1µF

ENABLE

20mA

SDA

SCL

I C Interface

C2-

GND

VOUT VIN

C1-

C1+

I²C is a trademark of Philips Corporation. Catalyst Semiconductor is licensed by Philips Corporation to carry the I²C bus protocol.

Characteristics subject to change without notice

Doc. No. MD-5014 Rev. D

12 3 4 5 6 7...15

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