IS31FL3740-ZLS4-TR ISSI

IS31FL3740 34 DOTS MATRIX LED DRIVER WITH INDIVIDUAL AUTO BREATH FUNCTION January 2018 GENERAL DESCRIPTION FEATURES The IS31FL3740 is a general purpose 34 LEDs Supply voltage range: 2.7V to 5.5V matrix driver with 1/12 cycle rate. The device can be 4 current source outputs for row control programmed via an I2C compatible interface. Each 3 switch current inputs for column scan control LED can be dimmed individually with 8-bit 8 PWM Up to 12 LEDs (34) in dot matrix data which allowing 1024 steps of linear dimming. Programmable 34 (4 RGBs) matrix size with de- IS31FL3740 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 offers128 steps gamma current, configured to be any Auto Breathing Mode or No- interrupt and state lookup registers Breathing Mode individually. 256 steps global current setting Additionally each LED open and short state can be Individual on/off control detected, IS31FL3740 store the open or short Individual 1024 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. QFN-20 (5mm5mm) and eTSSOP-20 packages The IS31FL3740 operates from 2.7V to 5.5V and features a very low shutdown and operational current. APPLICATIONS IS31FL3740 is available in QFN-20 (5mm5mm) and Mobile phones and other hand-held devices for eTSSOP-20 packages. It operates from 2.7V to 5.5V LED display over the temperature range of -40C to +125C. Gaming device (Keyboard, Mouse etc.) LED in white goods application Lumissil Microsystems www.lumissil.com 1 Rev. B, 01/18/2018 IS31FL3740 TYPICAL APPLICATION CIRCUIT Figure 1 Typical Application Circuit (34) Figure 2 Typical Application Circuit (RGB) Note 1: For the mobile applications the IC should be placed far away from the mobile antenna in order to prevent the EMI. Note 2: Electrolytic/Tantalum Capacitor may considerable for high current application to avoid audible noise interference. Lumissil Microsystems www.lumissil.com 2 Rev. B, 01/18/2018