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IS31FL3218 Dataheets PDF



Part Number IS31FL3218
Manufacturers ISSI
Logo ISSI
Description 18 CHANNELS LED DRIVER
Datasheet IS31FL3218 DatasheetIS31FL3218 Datasheet (PDF)

IS31FL3218 18 CHANNELS LED DRIVER April 2012 GENERAL DESCRIPTION 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. The chip can be turned off by pulling the SDB pin low or by using the software shutdown feature to r.

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IS31FL3218 18 CHANNELS LED DRIVER April 2012 GENERAL DESCRIPTION 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. 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”. 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. FEATURES        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 APPLICATIONS   Mobile phones and other hand-held devices for LED display LED in home appliances TYPICAL APPLICATION CIRCUIT VBattery VBattery 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 1 http://www.DataSheet4U.net/ 3 VCC 0.1 F OUT1 OUT2 OUT3 OUT4 1 F VDD 4.7k 4.7k OUT5 OUT6 OUT7 5 Micro Controller 100k IS31FL3218 SDA SCL SDB OUT8 OUT9 OUT10 OUT11 OUT12 OUT13 OUT14 6 24 2 3.3k R_EXT OUT15 OUT16 4 GND OUT17 OUT18 Figure 1 Typical Application Circuit Note: The maximum output current is set up to 23mA when REXT = 3.3kΩ. The maximum output current can be set by external resistor, REXT. 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 1 datasheet pdf - http://www.DataSheet4U.net/ IS31FL3218 PIN CONFIGURATION Package Pin Configuration (Top View) QFN-24 SOP-24 http://www.DataSheet4U.net/ PIN DESCRIPTION No. 1 2 3 4 5 6 7~23 24 Pin OUT18 R_EXT VCC GND SDA SCL OUT1 ~ OUT17 SDB Thermal Pad Description Output channel for LEDs. Input terminal used to connect an external resistor. This regulates the output current. Power supply. Ground. I2C serial data. I2C serial clock. Output channel for LEDs. Shutdown the chip when pulled low. Connect to GND. Integrated Silicon Solution, Inc. – www.issi.com Rev.B, 03/28/2012 2 datasheet pdf - http://www.DataSheet4U.net/ IS31FL3218 ORDERING INFORMATION Industrial Range: -40°C to +85°C Order Part No. IS31FL3218-QFLS2-TR IS31FL3218-GRLS2 Package QFN-24, Lead-free SOP-24, Lead-free QTY 2500/Reel 30/Tube http://www.DataSheet4U.net/ Copyright © 2011 Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification and its products at any  time without notice. ISSI assumes no liability arising out of the application or use of any information, products or services described herein. Customers are  advised to obtain the latest versi.


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