IS31FL3745 Datasheet | Lumissil

DESCRIPTION The IS31FL3745 is a general purpose 18×n (n=1~8) LED Matrix programmed via 1MHz I2C patible interface. Each LED can be dimmed individually with 8-bit PWM data and 8-bit DC scaling data which allowing 256 steps of linear PWM dimming and 256 steps of DC current adjustable level. Additionally each LED open and short state can be detected, IS31FL3745 store the open or short information in Open-Short Registers. The Open-Short Registers allowing MCU to read out via I2C patible interface. Inform MCU whether there are LEDs open or short and the locations of open or short LEDs. The IS31FL3745 operates from 2.7V to 5.5V and features a very low shutdown and operational current. IS31FL3745 is available in WLCSP-36 (2.93mm×2.93mm, 0.5mm ball pitch, 0.25mm ball diameter) package. It operates from 2.7V to 5.5V over the temperature range of -40°C to +125°C. October 2018 FEATURES - Supply voltage range: 2.7V to 5.5V - 18 Current sink (Maximum) - Support 18 × n (n=1~8) LED matrix configurations - Individual 256 PWM control steps - Individual 256 DC current steps - Global 256 current setting - SDB rising edge reset I2C module - Programmable H/L logic:1.4/0.4, 2.4/0.6 - 29k Hz PWM frequency - 1MHz I2C-patible interface - State lookup registers - Individual open and short error detect function - 180 degree phase delay operation to reduce power noise - De-Ghost - Cascade for synchronization of chips - WLCSP-36 (2.93mm×2.93mm, 0.5mm ball pitch, 0.25mm ball diameter) package APPLICATIONS - AI-speakers and smart home devices - LED display for hand-held devices TYPICAL APPLICATION CIRCUIT Figure 1 Typical Application Circuit: 48 RGBs Lumissil Microsystems - .lumissil. Rev. A, 10/08/2018 Figure 2 Typical Application Circuit (Eight Parts Synchronization-Work) Note 1: IC should be placed far away from the antenna in order to prevent the EMI. Note 2: The 20R between LED and IC is only for thermal reduction, for mono red LED, if PVCC=VCC=3.3V, don’t need these...