3-CHANNEL LED DRIVER DESCRIPTION RECOMMENDED EQUIPMENT IS31FL3194 is a 3-channel LED driver which features 5.0V, 1A power supply two-dimensional auto breathing mode. It has Pattern Mode and Current Level Mode for RGB lighting effects. ABSOLUTE MAXIMUM RATINGS The maximum output current can be adjusted in 4 levels (40mA Max.). 5.5V Micro USB DC power supply In Current Level Mode, the current level of each output Caution: Do not exceed the conditions listed above, otherwise the board will be damaged. can be independently programmed and controlled in 256 steps to simplify color mixing. In Pattern Mode, the timing characteristics for output current - current rising PROCEDURE (T1), holding (T2), falling (T3) and off time (TS, TP, T4), The IS31FL3194 evaluation board is fully assembled can be adjusted individually so that each output can and tested. Follow the steps listed below to verify board independently maintain a pre-established pattern operation. achieving mixing color breathing or a single color breathing without requiring any additional interface Caution: Do not turn on the power supply until all connections activity, thus saving valuable system resources. are completed. 1) Short last two pins (Bottom & Left) of TP1 to enable FEATURES the control of board MCU (default status). 2) Connect the 5VDC power to VCC/GND of TP1, or 2.7V to 5.5V supply voltage plug in the USB power input to micro-USB. One group RGB/RG+W, or 3 single color LED 3) Turn on the power supply, pay attention to the breathing system-free pre-established pattern supply current. If the current exceeds 1A, please I2C interface, automatic address increment check for circuit fault. function 4 band programmable output current for each EVALUATION BOARD OPERATION output, each band has 256 current levels The IS31FL3194 evaluation board has five display Selectable gamma value for automatic breathing modes. Press K1 to switch configurations: for each output Each pattern have 3 pre-established color Note: See Appendix for each modes detail. 1) 3 lamps breath one by one QUICK START Single lamp 2) breath and all lighting 3) RGB breath on high speed 4) RGB breath on medium speed 5) RGB breath on low speed Note: IS31FL3194 solely controls the FxLED function on the evaluation board. Figure 1: Photo of IS31FL3194 Evaluation Board ORDERING INFORMATION Part No. Temperature Range Package IS31FL3194-CLS2-EB -40C to +85C, Industrial WCSP-8, 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. C, 05/08/2021 3-CHANNEL LED DRIVER SOFTWARE CONTROL 4) Turn on the power supply/Plug in the Micro USB Pay attention to the supply current. If the current Last two pins of TP1 default setting is closed (short). exceeds 1A, please check for circuit fault. If it is set to open, the MCU s SDB, SCL and SDA pin 5) Start external IIC control. will be high impedance (open-drain) and external control is allowed. Caution: If last two pins of TP1 is closed (shorted), user cant connect the users MCU, otherwise the users MCU (maybe Follow the steps listed below for external control. 1.8V) will connect to evaluation bards MCU (3.0V) and maybe damaged. 1) Open last two pins of TP1 to enable external Please refer to the datasheet to get more information about control. IS31FL3194. 2) Pull-up the SDB to VCC or external IO control (H for normal operation). 3) Connect the 5VDC power to the connector. U2 VCC 3V U3 VLED VCC 1 5 1 8 VDD VOUT S1 D1 3 S2 7 D1 C1 3 SD C2 R1 R2 OSC OUT 1uF 100k 100k VRGB C3 2 4 BP 6 33P GND BP D2 Y1 BIT1 2 G1 8M C4 10nF BIT2 4 5 G2 D2 OSC IN LDO APM4953 33P U4 1 48 3V VBAT VDD 3 2 47 GND 3V PC13-ANTI TAMP VSS 3 3 46 PC14-OSC32 IN PB9/TIM4 CH4 4 45 PC15-OSC32 OUT PB8/TIM4 CH3 R3 5 44 BOOT0 R4 MODE OSC IN BOOT0 OSC IN 6 43 SDA K1 100k OSC OUT PB7/I2C1 SDA/TIM4 CH2 10k OSC OUT7 42 SCL KEY NRST PB6/I2C1 SCL/TIM4 CH1 GND 8 41 VSSA PB5 3V 9 40 VDDA PB4/JNTRST PA0 10 39 3V PA0-WKUP/ADC IN0/TIM2 CH1 ETR PB3/JTDO 1 2: 11 38 PA1/ADC IN1/TIM2 CH2 PA15/JTDI OPEN=EXT CTRL 12 37 CLK PA2/USART2 TX/ADC IN2/TIM2 CH3 PA14/JTCK/SWCLK TP1 EN 13 36 3V R5 PA3/USART2 RX/ADC IN3/TIM2 CH4 VDD 2 16 GND 14 35 GND 75K 16 PA4/SPI1 NSS/ADC IN4 VSS 2 15 GND 15 34 DIO PA0 15 PA5/SPI1 SCK/ADC IN5 PA13/JTMS/SWDIO 14 VCC 16 33 USB DP1 14 PA6/SPI1 MISO/ADC IN6/TIM3 CH1 PA12/CANTX/USBDP/TIM1 ETR 13 SDA 17 32 USB DM1 R6 13 PA7/SPI1 MOSI/ADC IN7/TIM3 CH2 PA11/CANRX/USBDM/TIM1 CH4 12 SCL KEY 18 31 27K 12 PB0/ADC IN8/TIM3 CH3 PA10/USART1 RX/TIM1 CH3 11 GND 19 30 11 PB1/ADC IN9/TIM3 CH4 PA9/USART1 TX/TIM1 CH2 10 SDB 20 29 10 PB2/BOOT1 PA8/TIM1 CH1/MCO 9 3V BIT1 21 28 SDB 9 PB10/I2C2 SCL/USART3 TX PB15/SPI2 MOSI/TIM1 CH3N 8 DIO BIT2 22 27 8 PB11/I2C2 SDA/USART3 RX PB14/SPI2 MISO/TIM1 CH2N 7 CLK 23 26 7 VSS 1 PB13/SPI2 SCK/TIM1 CH1N 6 GND 24 25 6 VDD 1 PB12/SPI2 NSS/TIM1 BKIN 5 VCC 5 STM32F103C8T6 4 VCC 4 3 NC 3 2 EN 2 1 GND 1 VCC PIN 16 C5 1uF VLED VRGB 3V D3 D2 D1 D4 D5 U1 USB5V VCC R8 R9 2 VDD 4.7k 4.7k 4 OUTG C6 OUT1 DFL240 10uF SDA 3 SDA SCL 5 1 SCL R7 22R VCC SDB 1 6 OUTR USB DM1 USB DM0 2 SDB OUT2 USB DM USB DP1 USB DP0 3 R12 USB DP 4 100k R10 22R NC 5 R11 GND 7 8 OUTB GND OUT3 3V CON1 1.5K IS31FL3194 Figure 2: IS32FL3194 Application Schematic Lumissil Microsystems www.lumissil.com 2 Rev. C, 05/08/2021