36 CHANNELS LED DRIVER EVALUATION BOARD GUIDE DESCRIPTION RECOMMENDED EQUIPMENT IS31FL3236A is comprised of 36 constant current 5.0V, 2A power supply channels each with independent PWM control, designed for driving LEDs, PWM frequency can be ABSOLUTE MAXIMUM RATINGS 3kHz or 22kHz. The output current of each channel can 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. Caution: Do not exceed the conditions listed above, otherwise The average LED current of each channel can be the board will be damaged. 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 IS31FL3236A 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 1) Connect the ground terminal of the power supply I2C interface, automatic address increment to the GND and the positive terminal to the VCC. function Or connect the DC power to the connector (DC IN) Four selectable I2C addresses (From version V01C the DC in is replaced by a SDB rising edge reset I2C module Micro-USB power in.). Internal reset register 2) Turn on the power supply and pay attention to the Modulate LED brightness with 256 steps PWM supply current. If the current exceeds 1.2A, please check for circuit fault. Each channel can be controlled independently 3) Enter the desired mode of display by toggling the Each channel can be scaled independently by 1, MODE button. 1/2, 1/3 and 1/4 PWM frequency selectable EVALUATION BOARD OPERATION - 3kHz (default) - 22kHz The IS31FL3236A evaluation board has six display -40C to +85C temperature range modes. Toggling the MODE button (K1) can switch the modes. QUICK START 1) (Default mode) The 12 RGB LEDs in the middle of the board show a color changing light bar moving pattern. 2) Two groups of blue LEDs display a tailing effect moving from right to left. 3) Two groups of blue LEDs display a tailing effect moving in opposite directions. 4) Blue LEDs perform digital number display. 5) Two groups of blue LEDs flash together from two sides to middle and then turn off slowly from both sides to middle. 6) The blue LEDs are put into four 8 digits and to show a twist light effect. Figure 1: Photo of IS31FL3236A Evaluation Board Note: IS31FL3236A solely controls the FxLED function on the (Please refer to Appendix if MCU is LPC922) evaluation board. ORDERING INFORMATION Part No. Temperature Range Package IS31FL3236A-QFLS2-EB -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. F, 08/27/2021 36 CHANNELS LED DRIVER EVALUATION BOARD GUIDE SOFTWARE SUPPORT The steps listed below are an example using the Arduino for external control. JP1 default setting is shorted. If it is set to open, the The Arduino hardware consists of an Atmel SDA, SCL and SDB pin are set to high impedance and the on-board MCU will be idle. External I2C and SDB microcontroller with a bootloader allowing quick signals can be connected to TP4 to control the firmware updates. First download the latest Arduino Integrated Development Environment IDE (1.6.12 or IS31FL3236A LED driver. During external control mode, greater) from www.arduino.cc/en/Main/Software. Also toggling the MODE button (K1) can switch the power of download the Wire.h library from single blue color LED and power of RGB LED. www.arduino.cc/en/reference/wire and verify that pgmspace.h is in the directory program Files(x86)/Arduino/hardware/tools/avr/avr/include/avr /. Then download the latest Arduino IS31FL3236A test firmware (sketch) from the Lumissil website