IS31FL3733B 1216 DOTS MATRIX LED DRIVER WITH INDIVIDUAL AUTO BREATH FUNCTION December 2021 GENERAL DESCRIPTION FEATURES The IS31FL3733B is a general purpose 1216 LEDs Supply voltage range: 2.7V to 5.5V matrix driver with 1/12 cycle rate. The device can be 16 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 192 LEDs (1216) in dot matrix which allowing 256 steps of linear dimming. Programmable 1216 (64 RGBs) matrix size with IS31FL3733B 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 look up 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 options detected, IS31FL3733B store the open or short 256 steps Global Current Setting information in Open-Short Registers. The Open-Short Individual on/off control Registers allowing MCU to read out via I2C compatible interface. Inform MCU whether there are Individual 256 PWM control steps LEDs open or short and the locations of open or short Individual Auto Breath Mode select LEDs. Individual open and short error detect function The IS31FL3733B operates from 2.7V to 5.5V and Cascade for synchronization of chips features a very low shutdown and operational current. QFN-48 (6mm6mm) and eTQFP-48 packages IS31FL3733B is available in QFN-48 (6mm6mm) and APPLICATIONS eTQFP-48 packages. It operates from 2.7V to 5.5V Hand-held devices for LED display over the temperature range of -40C to +125C. Gaming device (Keyboard, Mouse etc.) LED in white goods application TYPICAL APPLICATION CIRCUIT VBattery VIO/MCU *Note 2 20 39 PVCC VIO 22F/10V 0.47F 0.1 F 0.47F 29 PVCC CS1 CS2 CS3 CS4 CS5 CS6 CS7 CS8 CS9 CS10 CS11 CS12 CS13 CS14 CS15 CS16 0.47F 0.1 F 37 AVCC 33 CS16 L 38 DVCC 32 SW12 0.47F 0.1 F CS15 K SW11 V J IO/MCU SW10 17 100k 2k 2k CS2 I 16 SW9 41 CS1 SDA H 42 SW8 IS31FL3733B SCL Micro 45 G Controller INTB 15 SW7 46 SW12 SDB 14 F 47 SW11 SW6 IICRST 100k 100k E SW5 D 3 SW4 40 SW2 SYNC 2 C 35 SW1 SW3 ISET 43 B ADDR1 SW2 RISE T 44 5,12 20k ADDR2 PGND A 48 34 SW1 GND AGND 12 34567 89 10 11 12 13 14 15 16 Figure 1 Typical Application Circuit (1216) Lumissil Microsystems www.lumissil.com 1 Rev.D, 11/03/2021 IS31FL3733B TYPICAL APPLICATION CIRCUIT (CONTINUED) VBattery V IO/MCU *Note 2 20 39 PVCC VIO 22F/10V 0.47F 0.1 F 0.47F 29 PVCC CS1 CS2 CS3 CS4 CS5 CS6 CS7 CS8 CS9 CS10 CS11 CS12 CS13 CS14 CS15 CS16 0.47F 0.1 F 37 AVCC 33 CS16 L 38 DVCC 32 SW12 0.47F 0.1 F CS15 K SW11 VIO/MCU J SW10 100k 2k 2k 17 CS2 I 41 16 SW9 SDA CS1 42 H SCL SW8 IS31FL3733B 45 Micro INTB G Controller 46 15 SW7 SDB SW12 47 14 F IICRST SW11 SW6 100k 100k E SW5 D 3 SW4 40 SW2 SYNC 2 C 35 SW1 SW3 ISET 43 B ADDR1 SW2 RISE T 44 5,12 20k ADDR2 PGND A 48 34 SW1 GND AGND 12 34567 89 10 11 12 13 14 15 16 Figure 2 Typical Application Circuit (RGB) Note 1: IC should be placed far away from the antenna in order to prevent the EMI. Note 2: Electrolytic/Tantalum Capacitor maybe considered for high current application to avoid audible noise interference. Note 3: The VIO should be 1.8V V V . And it is recommended to be equal to V of the micro controller. For example, if V =1.8V, set IO CC OH OH V =1.8V, if V =3.3V, set V =3.3V. IO OH IO Figure 3 Typical Application Circuit (Eight Parts Synchronization-Work) Note 4: One system should contain only one master, all slave parts should be configured as slave mode before the master is configured as master mode. Work as master mode or slave mode specified by Configuration Register (Function register, address 00h). Master part output master clock, and all the other parts which work as slave input this master clock. Lumissil Microsystems www.lumissil.com 2 Rev.D, 11/03/2021