LED DRIVER. 31FL3206 Datasheet

31FL3206 DRIVER. Datasheet pdf. Equivalent


ISSI 31FL3206
IS31FL3206
12-CHANNEL LED DRIVER; SELECTABLE PWM FREQUENCY
Preliminary Information
May 2018
GENERAL DESCRIPTION
IS31FL3206 is comprised of 12 constant current
channels each with independent PWM control,
designed for driving LEDs, PWM frequency can be
24kHz (default) or 3.6kHz. The output current of each
channel can be set at up to 38mA (Max.) by an external
resistor and independently scaled by a factor of 1,
11/12, 9/12 and 7/12. 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.
IS31FL3206 is available in QFN-20 (3mm × 3mm)
package. It operates from 2.7V to 5.5V over the
temperature range of -40°C to +125°C.
FEATURES
2.7V to 5.5V supply
Each channel output current up to 38mA
I2C interface, automatic address increment
function
Four selectable I2C addresses
Internal reset register
Modulate LED brightness with 256 steps PWM
Each channel can be controlled independently
Each channel can be scaled independently by 1,
11/12, 9/12 and 7/12
PWM frequency selectable
- 24kHz (default)
- 3.6kHz
-40°C to +125°C temperature range
QFN-20 (3mm × 3mm) package
APPLICATIONS
AI-speakers and smart home devices
LED in home appliances
LED display for hand-held devices
TYPICAL APPLICATION CIRCUIT
VBattery
1F
2
VCC
0.1 F
VDD
4.7k 4.7k
VBattery
OUT1
OUT2
OUT3
7
8
9
Micro
Controller
100k
0.1 F
5
SDA
6
SCL
20
SDB
IS31FL3206
*Note 2 4
R_EXT
3.3k
1
AD
3,13
GND
OUT10
OUT11
OUT12
17
18
19
Figure 1 Typical Application Circuit
Note 1: The maximum output current is set to 38mA when REXT= 2k. Please refer Page 10 for setting LED current.
Note 2: A 0.1µF capacitor is necessary for passing the EFT test.
Integrated Silicon Solution, Inc. – www.issi.com
Rev. 0B, 05/16/2018
1


31FL3206 Datasheet
Recommendation 31FL3206 Datasheet
Part 31FL3206
Description 12-CHANNEL LED DRIVER
Feature 31FL3206; IS31FL3206 12-CHANNEL LED DRIVER; SELECTABLE PWM FREQUENCY Preliminary Information May 2018 GENERA.
Manufacture ISSI
Datasheet
Download 31FL3206 Datasheet




ISSI 31FL3206
IS31FL3206
PIN CONFIGURATION
Package
Pin Configuration (Top View)
QFN-20
AD 1
VCC 2
GND 3
R_EXT 4
SDA 5
15 OUT8
14 OUT7
13 GND
12 OUT6
11 OUT5
PIN DESCRIPTION
No. Pin
1
2
3, 13
AD
VCC
GND
4 R_EXT
5
6
7~12
14~19
20
SDA
SCL
OUT1~OUT6
OUT7 ~ OUT12
SDB
Thermal Pad
Description
I2C address setting.
Power supply.
Ground.
Input terminal used to connect an external resistor. This
regulates the global output current.
I2C serial data.
I2C serial clock.
Output channel 1~6 for LEDs.
Output channel 7~12 for LEDs.
Shutdown the chip when pulled low.
Connect to GND.
Integrated Silicon Solution, Inc. – www.issi.com
Rev. 0B, 05/16/2018
2



ISSI 31FL3206
IS31FL3206
ORDERING INFORMATION
Industrial Range: -40°C to +125°C
Order Part No.
Package
IS31FL3206-QFLS4-TR
QFN-20, Lead-free
QTY/Reel
2500
Copyright © 2018 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 version of this device specification before relying on any published information and before placing orders for products. 
Integrated Silicon Solution, Inc. does not recommend the use of any of its products in life support applications where the failure or malfunction of the 
product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. Products are not 
authorized for use in such applications unless Integrated Silicon Solution, Inc. receives written assurance to its satisfaction, that: 
a.) the risk of injury or damage has been minimized; 
b.) the user assume all such risks; and 
c.) potential liability of Integrated Silicon Solution, Inc is adequately protected under the circumstances
Integrated Silicon Solution, Inc. – www.issi.com
Rev. 0B, 05/16/2018
3







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