IS31FL3741 399 DOTS MATRIX LED DRIVER Preliminary Information September 2017 GENERAL DESCRIPTION FEATURES The IS31FL3741 is a general purpose 399 LED Supply voltage range: 2.7V ~ 5.5V Matrix programmed via an I2C compatible interface. 39 Current Sink 9 SW matrix size: drive up to Each LED can be dimmed individually with 8-bit PWM 351 LEDs or 117 RGBs data and 8-bit scaling data which allowing 256 steps Individual 256 PWM control steps of linear PWM dimming and 256 steps of DC current Individual 256 DC current steps adjustable level. Global 255 current setting Additionally each LED open and short state can be SDB rising edge reset I2C module detected, IS31FL3741 store the open or short Programmable H/L logic: 1.4/0.4, 2.4/0.6 information in Open-Short Registers. The Open-Short 29kHz PWM frequency Registers allowing MCU to read out via I2C 1MHz I2C-compatible interface compatible interface. Inform MCU whether there are LEDs open or short and the locations of open or short interrupt and state lookup registers LEDs. Individual open and short error detect function De-ghost The IS31FL3741 operates from 2.7V to 5.5V and QFN-60 (7mm7mm) package features a very low shutdown and operational current. IS31FL3741 is available in QFN-60 (7mm7mm) APPLICATIONS package. It operates from 2.7V to 5.5V over the Mobile phones and other hand-held devices for temperature range of -40C to +125C. LED display Gaming device (Keyboard, Mouse etc.) LED in write goods application Music box TYPICAL APPLICATION CIRCUIT 5V 15 PVCC 24 SW9 1 F 0.1 F 23 25 SW8 PVCC 1 F 0.1 F 14 SW1 SW2 SW3 SW4 SW5 SW6 SW7 SW8 SW9 AVCC 17 1 F 0.1 F SW2 16 20 SW1 CS39 V IO/MCU 20 CS38 100k 1k 1k 20 9 CS37 SDA IS31FL3741 10 SCL Micro 7 Controller INTB 11 SDB 6 20 CS39 CS3 5 100k 0.1 F CS38 20 CS2 20 CS1 13 R EXT 27 8 CS2 10k ADDR 26 12 CS1 GND 36,55 Figure 1 Typical Application Circuit (Single Color: 399) Integrated Silicon Solution, Inc. www.issi.com 1 Rev. 0B, 09/06/2017 IS31FL3741 TYPICAL APPLICATION CIRCUIT (CONTINUED) Figure 2 Typical Application Circuit (RGB Color: 139) Note: For the mobile applications the IC should be placed far away from the mobile antenna in order to prevent the EMI. Integrated Silicon Solution, Inc. www.issi.com 2 Rev. 0B, 09/06/2017