IS31FL3745-CLS4-EB ISSI

188 DOTS MATRIX LED DRIVER EVALUATION BOARD GUIDE DESCRIPTION RECOMMENDED EQUIPMENT The IS31FL3745 is a general purpose 18n (n=1~8) 5.0V, 2A power supply LED Matrix programmed via 1MHz I2C compatible interface. Each LED can be dimmed individually with 8-bit PWM data and 8-bit DC scaling data which ABSOLUTE MAXIMUM RATINGS allowing 256 steps of linear PWM dimming and 256 5.5V power supply steps of DC current adjustable level. Caution: Do not exceed the conditions listed above, otherwise Additionally each LED open and short state can be the board will be damaged. detected, IS31FL3745 store the open or short information in Open-Short Registers. The Open-Short Registers allowing MCU to read out via I2C compatible PROCEDURE interface. Inform MCU whether there are LEDs open or short and the locations of open or short LEDs. The IS31FL3745 evaluation board is fully assembled and tested. Follow the steps listed below to verify board operation. FEATURES Caution: Do not turn on the power supply until all connections Supply voltage range: 2.7V to 5.5V are completed. 18 Current sink (Maximum) 1) Short JP1 (OPEN=EXT CTRL) to enable the Support 18 n (n=1~8) LED matrix configurations control of on board MCU (default status). Individual 256 PWM control steps 2) Connect the 5V DC power to VCC / GND in CON4, Individual 256 DC current steps or plug in the USB power input to micro-USB (CON5). Global 256 current setting 3) Turn on the power supply, pay attention to the SDB rising edge reset I2C module supply current. If the current exceeds 1A, please Programmable H/L logic:1.4/0.4, 2.4/0.6 check for circuit fault. 29kHz PWM frequency State lookup registers EVALUATION BOARD OPERATION Individual open and short error detect function 180 degree phase delay operation to reduce power The IS31FL3745 evaluation board has six display noise modes. Press K1 to switch configurations. De-ghost 1) (Default mode) Rainbow 1. Cascade for synchronization of chips 2) Rainbow 2. 3) Purple breath. QUICK START 4) Change colors. 5) White. Note: IS31FL3745 solely controls the FxLED function on the evaluation board. Figure 1: Photo of IS31FL3745-CLS4 Evaluation Board ORDERING INFORMATION Part No. Temperature Range Package IS31FL3745-CLS4-EB -40C to +125C (Industrial) WLCSP-36, 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. A, 03/11/2019 188 DOTS MATRIX LED DRIVER EVALUATION BOARD GUIDE SOFTWARE SUPPORT The steps listed below are an example using the Arduino for external control. EXT CTRL (JP1) default setting is close circuit. If it is set to open, the on-board MCU will configure the I2C The Arduino hardware consists of an Atmel microcontroller with a bootloader allowing quick pins and SDB pin to High Impedance and sleep. External I2C and SDB signals can be connected to firmware updates. First download the latest Arduino Integrated Development Environment IDE (1.6.12 or TP4 to control the IS31FL3745 LED driver. greater) from www.arduino.cc/en/Main/Software. Also download the Wire.h library from 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 IS31FL3745 test firmware (sketch) from the Lumissil website