12-CHANNEL LED DRIVER EVALUATION BOARD GUIDE DESCRIPTION RECOMMENDED EQUIPMENT IS31FL3206 is comprised of 12 constant current 5.0V, 2A power supply channels each with independent PWM control, designed for driving LEDs, PWM frequency can be ABSOLUTE MAXIMUM RATINGS 24kHz (default) or 3.6kHz. The output current of each channel can be set at up to 38mA (Max.) by an external 5.5V power supply resistor and independently scaled by a factor of 1, 11/12, Caution: Do not exceed the conditions listed above, otherwise 9/12 and 7/12. The average LED current of each the board will be damaged. channel can be changed in 256 steps by changing the PWM duty cycle through an I2C interface. PROCEDURE The chip can be turned off by pulling the SDB pin low The IS31FL3206 evaluation board is fully assembled or by using the software shutdown feature to reduce and tested. Follow the steps listed below to verify board power consumption. operation. FEATURES Caution: Do not turn on the power supply until all connections are completed. 2.7V to 5.5V supply I2C interface, automatic address increment 1) If using external DC power supply connect the function ground terminal of the power supply to the evaluation board s GND pin and the positive Modulate LED brightness with 256 steps PWM terminal to the VCC pin. The evaluation board can Each channel can be scaled independently by 1, also be powered via the Micro USB connector. 11/12, 9/12 and 7/12 PWM frequency selectable 2) Short JP1 to close external control. - 24kHz (default) 3) Turn on the power supply/Plug in the Micro USB - 3.6kHz and pay attention to the supply current. If the -40C to +125C temperature range current exceeds 1A, please check for circuit fault. QFN-20 (3mm 3mm) package 4) Enter the desired mode of display by toggling the MODE button (K1). QUICK START EVALUATION BOARD OPERATION The IS31FL3206 evaluation board has five display modes. Press K1 to switch configurations: Note: See Appendix for each modes detail. 1) Two groups single color LEDs chasing each other- A. 2) Two groups single color LEDs chasing each other- B. 3) Three groups single color LEDs chasing after each other. 4) Chasing cycle. 5) RGB LEDs (RGB1-RGB4) are breathing effect A- mixed color. Figure 1: Photo of IS31FL3206 Evaluation Board 6) RGB LEDs (RGB1-RGB4) are breathing effect B. Note: IS31FL3206 solely controls the FxLED function on the evaluation board. ORDERING INFORMATION Part No. Temperature Range Package IS31FL3206-QFLS4-EB -40C to +125C, Industrial QFN-20, Lead-free Table 1: Ordering Information For pricing, delivery, and ordering information, please contacts Lumissils analog marketing team at analog Lumissil.com or (408) 969-6600. Lumissil Microsystems www.lumissil.com 1 Rev. B, 05/08/2021 12-CHANNEL LED DRIVER EVALUATION BOARD GUIDE SOFTWARE SUPPORT Integrated Development Environment IDE (1.6.12 or greater) from www.arduino.cc/en/Main/Software. Also JP1 (EXT CTRL) default setting is closed (jumper on). download the Wire.h library from If it is open (when the EVB is powered on by 5V DC or www.arduino.cc/en/reference/wire and verify that micro-USB, no jumper JP1), the on-board MCU will pgmspace.h is in the directory program configure its own I2C/SDB/AD pins to High Impedance Files(x86)/Arduino/hardware/tools/avr/avr/include/avr status so an external source can driver the I2C/SDB /. Then download the latest IS31FL3206 test firmware signals to control the IS31FL3206 LED driver, the on- (sketch) from the Lumissil website board MCU will also configure the U4 to open the