IS31FL3736B 128 DOTS MATRIX LED DRIVER WITH INDIVIDUAL AUTO BREATH FUNCTION March 2021 GENERAL DESCRIPTION FEATURES The IS31FL3736B is a general purpose 128 LEDs Supply voltage range: 2.7V to 5.5V matrix driver with 1/12 cycle rate. The device can be 8 current source outputs for row control programmed via an I2C compatible interface. Each 12 switch current inputs for column scan control LED can be dimmed individually with 8-bit PWM data Up to 96 LEDs (128) in dot matrix which allowing 256 steps of linear dimming. Programmable128 (32 RGBs) matrix size with IS31FL3736B features 3 Auto Breathing Modes which de-ghost function are noted as ABM-1, ABM-2 and ABM-3. For each 1MHz I2C-compatible interface Auto Breathing Mode, there are 4 timing characters Selectable 3 Auto Breath Modes for each dot which include current rising / holding / falling / off time Auto breath loop features interrupt pin inform and 3 loop characters which include Loop-Beginning / MCU auto breath loop completed Loop-Ending / Loop-Times. Every LED can be Auto breath offers 128 steps gamma current, configured to be any Auto Breathing Mode or No- interrupt and state lookup registers Breathing Mode individually. 1.05kHz/ 2.1kHz/ 4.2kHz/ 8.4kHz/ 26.7kHz PWM Additionally each LED open and short state can be frequency option detected, IS31FL3736B store the open or short 256 steps global current setting information in LED Open/Short Registers. The LED Individual on/off control Open/Short Registers allowing MCU to read out via I2C compatible interface. Inform MCU whether there Individual 256 PWM control steps are LEDs open or short and the locations of open or Individual Auto Breath Mode select short LEDs. Individual open and short error detect function The IS31FL3736B operates from 2.7V to 5.5V and Cascade for synchronization of chips features a very low shutdown and operational current. QFN-40 (5mm5mm) package IS31FL3736B is available in QFN-40 (5mm5mm) APPLICATIONS package. It operates from 2.7V to 5.5V over the Hand-held devices for LED display temperature range of -40C to +125C. Gaming device (Keyboard, Mouse etc.) LED in white goods application Lumissil Microsystems www.lumissil.com 1 Rev. C, 01/19/2021 IS31FL3736B TYPICAL APPLICATION CIRCUIT V CC V 5V IO/MCU *Note 2 17 31 PVCC VIO 0.47 F 0.1 F 0.47 F 22 F/10V 23 PVCC CS1CS2 CS3CS4 CS5CS6 CS7CS8 0.47 F 0.1 F 27 DVCC 25 CS8 L 28 AVCC 24 SW12 0.47 F 0.1 F CS7 K SW11 V IO/MCU J SW10 100k 2k 2k 16 CS2 I 33 15 SW9 SDA CS1 34 H SCL SW8 Micro IS31FL3736B 37 Controller INTB G 38 14 SW7 SDB SW12 39 13 F IICRST SW11 SW6 100k 100k E SW5 D 2 SW4 32 SW2 SYNC 1 C 30 SW1 SW3 ISET 35 B ADDR1 SW2 RISET 36 4,11 20k ADDR2 PGND A 40 26 SW1 GND AGND 123 456 78 Figure 1 Typical Application Circuit (128) Figure 2 Typical Application Circuit (RGB) Lumissil Microsystems www.lumissil.com 2 Rev. C, 01/19/2021