36 CHANNELS LED DRIVER EVALUATION BOARD GUIDE DESCRIPTION RECOMMENDED EQUIPMENT IS31FL3236A is comprised of 36 constant current Micro-USB 5V channels each with independent PWM control, designed for driving LEDs, PWM frequency can be 3kHz or 22kHz. The output current of each channel can ABSOLUTE MAXIMUM RATINGS be set at up to 38mA (Max.) by an external resistor and 5.5V power supply independently scaled by a factor of 1, 1/2, 1/3 and 1/4. The average LED current of each channel can be Caution: Do not exceed the conditions listed above, otherwise the board will be damaged. changed in 256 steps by changing the PWM duty cycle through an I2C interface. PROCEDURE FEATURES The IS31FL3236A evaluation board is fully assembled 2.7V to 5.5V supply and tested. Follow the steps listed below to verify board operation. I2C interface, automatic address increment function Caution: Do not turn on the power supply until all connections Modulate LED brightness with 256 steps PWM are completed. Each channel can be scaled independently by 1, 1) Plug in the USB power input micro-USB. 1/2, 1/3 and 1/4 2) Enter the desired mode of display by toggling the PWM frequency selectable MODE button. QFN-44 (5mm 5mm) package EVALUATION BOARD OPERATION QUICK START The IS31FL3236A evaluation board has five display modes. Press MODE button to switch configurations. 1) (Default mode) Rainbow loops mode. 2) Four colors change. 3) Full color change. 4) Half round rainbow mode. 5) Running LED change. Note: IS31FL3236A solely controls the FxLED function on the evaluation board. Figure 1: Photo of IS31FL3236A Evaluation Board ORDERING INFORMATION Part No. Temperature Range Package IS31FL3236A-QFLS2-EBCYCLE -40C to +85C (Industrial) QFN-44, 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. D, 05/08/2021 36 CHANNELS LED DRIVER EVALUATION BOARD GUIDE U1 P1 3V 3V VCC 1 5 4 VDD VOUT DIO U2 3 1 48 3V CLK VBAT VDD 3 2 2 47 GND GND 3 PC13-ANTI TAMP VSS 3 1 SD C2 3 46 PC14-OSC32 IN PB9/TIM4 CH4 1uF 4 45 Header 4 PC15-OSC32 OUT PB8/TIM4 CH3 R1 C3 OSC IN 5 44 BOOT0 2 4 BP OSC IN BOOT0 GND GND BP OSC OUT 6 43 SDA OSC OUT PB7/I2C1 SDA/TIM4 CH2 10k 7 42 SCL 10nF NRST PB6/I2C1 SCL/TIM4 CH1 C1 GND 8 41 LDO VSSA PB5 OSC OUT 3V 9 40 VDDA PB4/JNTRST PA0 10 39 PA0-WKUP/ADC IN0/TIM2 CH1 ETR PB3/JTDO 11 38 33P PA1/ADC IN1/TIM2 CH2 PA15/JTDI Y1 12 37 CLK PA2/USART2 TX/ADC IN2/TIM2 CH3 PA14/JTCK/SWCLK 8M C4 EN 13 36 3V PA3/USART2 RX/ADC IN3/TIM2 CH4 VDD 2 OSC IN 14 35 GND VCC PA4/SPI1 NSS/ADC IN4 VSS 2 15 34 DIO PA5/SPI1 SCK/ADC IN5 PA13/JTMS/SWDIO C5 16 33 USB DP1 33P PA6/SPI1 MISO/ADC IN6/TIM3 CH1 PA12/CANTX/USBDP/TIM1 ETR GND 10uF 17 32 USB DM1 GND PA7/SPI1 MOSI/ADC IN7/TIM3 CH2 PA11/CANRX/USBDM/TIM1 CH4 KEY 18 31 PB0/ADC IN8/TIM3 CH3 PA10/USART1 RX/TIM1 CH3 3V 1 19 30 R3 22R VCC PB1/ADC IN9/TIM3 CH4 PA9/USART1 TX/TIM1 CH2 USB DM1 USB DM0 2 20 29 USB DM PB2/BOOT1 PA8/TIM1 CH1/MCO USB DP1 USB DP0 3 BIT1 21 28 SDB USB DP PB10/I2C2 SCL/USART3 TX PB15/SPI2 MOSI/TIM1 CH3N MODE R2 4 BIT2 22 27 R4 22R NC PB11/I2C2 SDA/USART3 RX PB14/SPI2 MISO/TIM1 CH2N K1 100k 5 GND 23 26 R5 GND VSS 1 PB13/SPI2 SCK/TIM1 CH1N KEY 3V 24 25 GND 3V VDD 1 PB12/SPI2 NSS/TIM1 BKIN CON1 1.5k STM32F103C8T6 GND VCC VCC U3 C6 1uF 38 35 OUT36 D1 D2 D3 D4 D5 D6 GND VDD OUT36 34 OUT35 LED RGB LED RGB LED RGB LED RGB LED RGB LED RGB OUT35 33 OUT34 OUT34 3V 32 OUT33 OUT33 31 OUT32 OUT32 R6 R7 R8 R9 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 R22 R23 30 OUT31 OUT31 R24 R25 29 OUT30 33R 91R 33R 33R 91R 33R 33R 91R 33R 33R 91R 33R 33R 91R 33R 33R 91R 33R OUT30 3k3 3k3 28 OUT29 OUT29 27 OUT28 OUT28 OUT01 OUT04 OUT07 OUT10 OUT13 OUT16 SCL 42 26 OUT27 SCL OUT27 OUT02 OUT05 OUT08 OUT11 OUT14 OUT17 SDA 41 25 OUT26 SDA OUT26 OUT03 OUT06 OUT09 OUT12 OUT15 OUT18 24 OUT25 OUT25 SDB 36 23 OUT24 SDB OUT24 22 OUT23 OUT23 R26 21 OUT22 OUT22 100k 20 OUT21 OUT21 19 OUT20 OUT20 18 OUT19 OUT19 16 OUT18 OUT18 D7 D8 D9 D10 D11 D12 GND 15 OUT17 OUT17 LED RGB LED RGB LED RGB LED RGB LED RGB LED RGB 14 OUT16 OUT16 13 OUT15 OUT15 12 OUT14 OUT14 11 OUT13 R27 R28 R29 R30 R31 R32 R33 R34 R35 R36 R37 R38 R39 R40 R41 R42 R43 R44 OUT13 33R 91R 33R 33R 91R 33R 33R 91R 33R 33R 91R 33R 33R 91R 33R 33R 91R 33R 40 10 OUT12 R EXT OUT12 9 OUT11 OUT11 8 OUT10 OUT10 OUT19 OUT22 OUT25 OUT28 OUT31 OUT34 R45 7 OUT09 OUT9 OUT20 OUT23 OUT26 OUT29 OUT32 OUT35 3k3 6 OUT08 OUT8 OUT21 OUT24 OUT27 OUT30 OUT33 OUT36 5 OUT07 OUT7 37 4 OUT06 AD OUT6 3 OUT05 OUT5 2 OUT04 OUT4 39 1 OUT03 GND OUT3 17 44 OUT02 GND OUT2 43 OUT01 OUT1 GND IS31FL3236A QFN44 5*5 Figure 2: IS31FL3236A Application Schematic Lumissil Microsystems www.lumissil.com 2 Rev. D, 05/08/2021