{"title":"Adafruit 16x9 Charlieplexed PWM LED Matrix Driver - IS31FL3731","handle":"adafruit-16x9-charlieplexed-pwm-led-matrix-driver-is31fl3731","url":"/products/adafruit-16x9-charlieplexed-pwm-led-matrix-driver-is31fl3731","description":"The Adafruit IS31FL3731 breakout is a charlieplexed PWM LED matrix driver that controls a 16×9 grid of individually dimmable LEDs over I2C. Each of the 144 LEDs can be set to any brightness level with 8-bit (256-level) PWM — no complex wiring or constant signal sending required.\n\nThe IS31FL3731 operates at 2.7–5.5V, making it compatible with any microcontroller. Up to 4 boards can share an I2C bus using address selection. The chip includes onboard RAM for 8 separate frames of display memory, enabling smooth animations with a single frame-switch command.\n\nKey Features\n\n\n16×9 LED Matrix – Drive up to 144 charlieplexed LEDs\n\nIS31FL3731 Driver – I2C control with individual 8-bit PWM dimming\n\n8 Animation Frames – Onboard RAM for storing and switching display frames\n\n2.7–5.5V Operation – Compatible with any 3.3V or 5V microcontroller\n\nUp to 4 Boards – Selectable I2C addresses for multiple displays\n\nAdafruit_GFX Compatible – Draw lines, circles, text, and bitmaps\n\n\nIdeal For\n\nCustom LED matrix displays\nLED animations and lighting effects\nCompact indicator arrays and signage\nPairing with Adafruit LED grid modules\n\n\nPackage Contents\n\n1× Adafruit IS31FL3731 16×9 charlieplex LED matrix driver breakout\n\n\n\nImportant: LED matrix not included. This board is designed to pair with Adafruit's matching LED grid modules, or you can wire your own LED matrix following the IS31FL3731 datasheet schematic. Soldering required for assembly.\n\n\nSpecifications\n\n\nDriver Chip – IS31FL3731\n\nMatrix Capacity – 16×9 (144 LEDs)\n\nPWM Resolution – 8-bit (256 levels) per LED\n\nAnimation Frames – 8\n\nOperating Voltage – 2.7–5.5V\n\nInterface – I2C (4 selectable addresses)\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":11148,"title":"Default Title","sku":"AF-2946","price":11.6,"on_sale":false,"in_stock":true,"available_quantity":109,"option1":"Default Title"}]}