IS31FL3209 18 CHANNELS LED DRIVER 1/24 DC SCALING WHITE BALANCE December 2017 GENERAL DESCRIPTION FEATURES IS31FL3209 is comprised of 18 constant current 2.7V to 5.5V supply channels each with independent PWM control, Each channel output current up to 76mA designed for driving LEDs, PWM frequency can be I2C interface, automatic address increment 23kHz (default) or 3.45kHz. The output current of each function channel can be set at up to 76mA (Max.) by an external Four selectable I2C addresses resistor and independently scaled by a factor of 1, Internal reset register 23/24, 22/24, 21/22, 20/24, 19/24, 18/24, 16/24, 14/24, Modulate LED brightness with 256 steps PWM 12/24, 11/24, 9/24 and 7/24.The average LED current of each channel can be changed in 256 steps by Each channel can be controlled independently changing the PWM duty cycle through an I2C interface. Each channel can be scaled independently by 1, 23/24, 22/24, 21/22, 20/24, 19/24, 18/24, 16/24, The chip can be turned off by pulling the SDB pin low or 14/24, 12/24, 11/24, 9/24 and 7/24 by using the software shutdown feature to reduce PWM frequency selectable power consumption. - 23kHz (default) IS31FL3209 is available in QFN-28 (4mm 4mm) - 3.45kHz package. It operates from 2.7V to 5.5V over the -40C to +125C temperature range temperature range of -40C to +125C. QFN-28 (4mm 4mm) package APPLICATIONS Mobile phones and other hand-held devices for LED display LED in home appliances TYPICAL APPLICATION CIRCUIT Figure 1 Typical Application Circuit Note 1: The maximum output current is set to 76mA when R = 2k. Please refer Page 10 for setting LED current. EXT Note 2: A 0.1F capacitor is necessary for passing the EFT test. Lumissil Microsystems www.lumissil.com 1 Rev. A, 11/24/2017 IS31FL3209 PIN CONFIGURATION Package Pin Configuration (Top View) QFN-28 PIN DESCRIPTION No. Pin Description 1 SDB Shutdown the chip when pulled low. 2 AD I2C address setting. 3 VCC Power supply. 4,11, GND Ground. 18,25 Input terminal used to connect an external resistor. This 5 R EXT regulates the global output current. 6 SDA I2C serial data. 7 SCL I2C serial clock. 8~10 OUT1~OUT3 Output channel 1~3 for LEDs. 12~17 OUT4 ~ OUT9 Output channel 4~9 for LEDs. 19~24 OUT10 ~ OUT15 Output channel 10~15 for LEDs. 26~28 OUT16 ~ OUT18 Output channel 16~18 for LEDs. Thermal Pad Connect to GND. Lumissil Microsystems www.lumissil.com 2 Rev. A, 11/24/2017