IS32FL3738 68 DOTS MATRIX LED DRIVER WITH INDIVIDUAL AUTO BREATH FUNCTION May 2018 GENERAL DESCRIPTION FEATURES The IS32FL3738 is a general purpose 68 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 6 switch current inputs for column scan control LED can be dimmed individually with 8-bit 4 PWM Up to 48 LEDs (68) in dot matrix data which allowing 512 steps of linear dimming. Programmable 68 (16 RGBs) matrix size with de- IS32FL3738 features 3 Auto Breathing Modes which 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. 256 steps global current setting Additionally each LED open and short state can be Individual on/off control detected, IS32FL3738 store the open or short Individual 512 PWM control steps information in Open-Short Registers. The Open-Short Registers allowing MCU to read out via I2C Individual Auto Breath Mode select compatible interface. Inform MCU whether there are Individual open and short error detect function LEDs open or short and the locations of open or short Cascade for synchronization of chips LEDs. eTSSOP-28 package The IS32FL3738 operates from 2.7V to 5.5V and Automotive AEC-Q100 qualified features a very low shutdown and operational current. APPLICATIONS IS32FL3738 is available in eTSSOP-28 package. It Automotive clusters operates from 2.7V to 5.5V over the temperature Dashboards range of -40C to +125C. Automotive interiors Lumissil Microsystems www.lumissil.com 1 Rev. A, 05/04/2018 IS32FL3738 TYPICAL APPLICATION CIRCUIT VBattery V IO/MCU *Note 2 22 4 PVCC VIO 22 F 10V 0.47 F 0.1 F 0.47 F 27 PVCC 0.47 F 0.1 F 3 1 AVCC CS8 28 0.47 F 0.1 F CS7 CS1CS2 CS3CS4 CS5CS6 CS7CS8 V IO/MCU F 21 SW6 100k 2k 2k CS2 20 E 6 CS1 SW5 SDA IS32FL3738 7 D SCL SW4 Micro 9 Controller INTB 19 C 10 SW6 SW3 SDB 17 SW5 B SW2 100k A SW1 5 SYNC 13 12 34 567 8 2 SW2 R EXT 12 SW1 REXT 8 20k ADDR 11 14,18 GND PGND Figure 1 Typical Application Circuit (68) VBattery V IO/MCU *Note 2 22 4 PVCC VIO 22 F 10V 0.47 F 0.1 F 0.47 F 27 PVCC 0.47 F 0.1 F 3 1 AVCC CS8 28 0.47 F 0.1 F CS7 CS1CS2 CS3CS4 CS5CS6 CS7CS8 V IO/MCU F 21 SW6 100k 2k 2k CS2 20 E 6 CS1 SW5 SDA IS32FL3738 7 D SCL SW4 Micro 9 Controller INTB 19 C 10 SW6 SW3 SDB 17 SW5 B SW2 100k A SW1 5 SYNC 13 12 34 567 8 2 SW2 R EXT 12 SW1 REXT 8 20k ADDR 11 14,18 GND PGND 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. Lumissil Microsystems www.lumissil.com 2 Rev. A, 05/04/2018