Datasheet > IS31FL3218

IS31FL3218

更新时间： 2024-11-11 12:23:07

品牌	Logo	应用领域
美国芯成 - ISSI		驱动器
页数	文件大小	规格书
13页	342K
描述
18 CHANNELS LED DRIVER

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IS31FL3218 数据手册

IS31FL3218

18 CHANNELS LED DRIVER

April 2012

GENERAL DESCRIPTION

FEATURES

IS31FL3218 is comprised of 18 constant current

channels each with independent PWM control,

designed for driving LEDs. The output current of each

channel can be set at up to 38mA (Max.) by an external

resistor. The average LED current of each channel can

be changed in 256 steps by changing the PWM duty

cycle through an I2C interface.



2.7V to 5.5V supply

I2C interface, automatic address increment

function



Internal reset register

Modulate LED brightness with 256 steps PWM

Each channel can be controlled independently

-40°C to +85°C temperature range

QFN-24 (4mm × 4mm), SOP-24 package

The chip can be turned off by pulling the SDB pin low or

by using the software shutdown feature to reduce

power consumption. The slave address is fixed “1010

1000”.

APPLICATIONS

IS31FL3218 is available in QFN-24 (4mm × 4mm) and

SOP-24. It operates from 2.7V to 5.5V over the

temperature range of -40°C to +85°C.



Mobile phones and other hand-held devices for

LED display

LED in home appliances

TYPICAL APPLICATION CIRCUIT

VBattery

OUT1

OUT2

VCC

0.1 F

OUT3

OUT4

OUT5

VDD

OUT6

OUT7

4.7k 4.7k

OUT8

IS31FL3218

SDA

SCL

SDB

OUT9

Micro

Controller

OUT10

OUT11

OUT12

OUT13

OUT14

OUT15

OUT16

OUT17

OUT18

100k

R_EXT

GND

3.3k

Figure 1 Typical Application Circuit

Note: The maximum output current is set up to 23mA when R_EXT= 3.3kΩ. The maximum output current can be set by external resistor, R_EXT

Please refer to the detail information in Page 9.

Note: The IC should be placed far away from the mobile antenna in order to prevent the EMI.

Integrated Silicon Solution, Inc. – www.issi.com

Rev.B, 03/28/2012

12 3 4 5 6 7...13

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