IS31FL3731 Datasheet | ISSI

DESCRIPTION The IS31FL3731 is a pact LED driver for 144 single LEDs. The device can be programmed via an I2C patible interface. The IS31FL3731 offers two blocks each driving 72 LEDs with 1/9 cycle rate. The required lines to drive all 144 LEDs are reduced to 18 by using the cross-plexing feature optimizing space on the PCB. Additionally each of the 144 LEDs can be dimmed individually with 8-bit allowing 256 steps of linear dimming. To reduce CPU usage up to 8 frames can be stored with individual time delays between frames to play small animations automatically. LED frames can be modulated with audio signal. IS31FL3731 is available in QFN-28 (4mm × 4mm) and SSOP-28 package. It operates from 2.7V to 5.5V over the temperature range of -40°C to +85°C. FEATURES - - - - - - - - - - Supply voltage range: 2.7V to 5.5V 400k Hz I2C-patible interface 144 LEDs in dot matrix Individual blink control 8 frames memory for animations Picture mode and animation mode Auto intensity breathing during the switching of different frames LED frames displayed can be modulated with audio signal intensity LED light intensity can be modulated with audio signal intensity QFN-28 (4mm × 4mm) and SSOP-28 package APPLICATIONS - - Mobile phones and other hand-held devices for LED display LED in home appliances TYPICAL APPLICATION CIRCUIT http://..net/ Figure 1 Typical Application Circuit Note 1: The IC should be placed far away from the mobile antenna in order to prevent the EMI. Note 2: The average current of each LED is 3.2m A when REXT = 20kΩ. The LED current can be modulated by the REXT. Please refer to the detail information in Page 16. Integrated Silicon Solution, Inc. - .issi. Rev.B, 09/10/2012 1 datasheet pdf - http://..net/ PIN CONFIGURATION Package Pin Configuration (Top View) QFN-28 SSOP-28 http://..net/ Integrated Silicon Solution, Inc. - .issi. Rev.B, 09/10/2012 2 datasheet pdf - http://..net/ PIN DESCRIPTION No. 1 2 3 4 5 6 7 ~ 15 16 17 18 19 20 21 ~...