IS31FL3736A 128 DOTS MATRIX LED DRIVER WITH INDIVIDUAL AUTO BREATH FUNCTION December 2018 GENERAL DESCRIPTION FEATURES The IS31FL3736A 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 IS31FL3736A 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. 7.4kHz/25kHz PWM frequency option Additionally each LED open and short state can be 256 steps global current setting detected, IS31FL3736A store the open or short Individual on/off control information in LED Open/Short Registers. The LED Open/Short Registers allowing MCU to read out via Individual 256 PWM control steps I2C compatible interface. Inform MCU whether there Individual Auto Breath Mode select are LEDs open or short and the locations of open or Individual open and short error detect function short LEDs. Cascade for synchronization of chips The IS31FL3736A operates from 2.7V to 5.5V and QFN-40 (5mm5mm) package features a very low shutdown and operational current. APPLICATIONS IS31FL3736A is available in QFN-40 (5mm5mm) Hand-held devices for LED display package. It operates from 2.7V to 5.5V over the Gaming device (Keyboard, Mouse etc.) temperature range of -40C to +125C. LED in white goods application Lumissil Microsystems www.lumissil.com 1 Rev. A, 12/17/2018 IS31FL3736A 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 CS1 CS2 CS3 CS4 CS5 CS6 CS7 CS8 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 IS31FL3736A 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 12345678 Figure 1 Typical Application Circuit (128) 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 CS1 CS2 CS3 CS4 CS5 CS6 CS7 CS8 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 IS31FL3736A 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 12 345678 Figure 2 Typical Application Circuit (RGB) Lumissil Microsystems www.lumissil.com 2 Rev. A, 12/17/2018