IS31FL3731C-SALS2 ISSI

IS31FL3731C AUDIO MODULATED MATRIX LED DRIVER April 2014 GENERAL DESCRIPTION FEATURES The IS31FL3731C is a compact LED driver for 144 Supply voltage range: 2.7V to 5.5V single LEDs. The device can be programmed via an 400kHz I2C-compatible interface I2C compatible interface. The high logic (0.77V ) and CC 0.77V threshold logic high control CC low logic (0.2V ) control threshold are specially CC 144 LEDs in dot matrix designed for white goods and industry application to Individual blink control minimize the impact by the EMC noise. The 8 frames memory for animations IS31FL3731C offers two blocks each driving 72 LEDs with 1/9 cycle rate. The required lines to drive all 144 Picture mode and animation mode LEDs are reduced to 18 by using the cross-plexing Auto intensity breathing during the switching of feature optimizing space on the PCB. Additionally different frames each of the 144 LEDs can be dimmed individually with LED frames displayed can be modulated with 8-bit allowing 256 steps of linear dimming. audio signal intensity To reduce CPU usage up to 8 frames can be stored LED light intensity can be modulated with audio with individual time delays between frames to play signal intensity small animations automatically. LED frames can be QFN-28 (4mm 4mm) and SSOP-28 package modulated with audio signal. IS31FL3731C is available in QFN-28 (4mm 4mm) APPLICATIONS and SSOP-28 package. It operates from 2.7V to 5.5V over the temperature range of -40C to +85C. White goods LED application Home, medical, industrial LED appliances TYPICAL APPLICATION CIRCUIT VBattery 2 VCC 21 CA1 1F0.1 F 22 CA2 23 CA3 Matrix A Matrix B V 24 DD CA4 CA1 CB1 25 4.7k 4.7k 4.7k CA5 C1-1 C1-2 C1-3 C1-4 C1-5 C1-6 C1-7 C1-8 C1-9 C1-10 C1-11 C1-12 C1-13 C1-14 C1-15 C1-16 26 CA2 CB2 19 CA6 SDA 27 C2-1 C2-2 C2-3 C2-4 C2-5 C2-6 C2-7 C2-8 C2-9 C2-10 C2-11 C2-12 C2-13 C2-14 C2-15 C2-16 20 CA7 CA3 CB3 SCL 28 Micro 4 CA8 C3-1 C3-2 C3-3 C3-4 C3-5 C3-6 C3-7 C3-8 C3-9 C3-10 C3-11 C3-12 C3-13 C3-14 C3-15 C3-16 Controller INTB 1 CA4 CB4 3 CA9 SDB C4-1 C4-2 C4-3 C4-4 C4-5 C4-6 C4-7 C4-8 C4-9 C4-10 C4-11 C4-12 C4-13 C4-14 C4-15 C4-16 CA5 CB5 IS31FL3731C 100k 7 C5-1 C5-2 C5-3 C5-4 C5-5 C5-6 C5-7 C5-8 C5-9 C5-10 C5-11 C5-12 C5-13 C5-14 C5-15 C5-16 CB1 CA6 CB6 8 CB2 C6-1 C6-2 C6-3 C6-4 C6-5 C6-6 C6-7 C6-8 C6-9 C6-10 C6-11 C6-12 C6-13 C6-14 C6-15 C6-16 17 9 CA7 CB7 Audio In IN CB3 10 0.22 F C7-1 C7-2 C7-3 C7-4 C7-5 C7-6 C7-7 C7-8 C7-9 C7-10 C7-11 C7-12 C7-13 C7-14 C7-15 C7-16 CB4 CA8 CB8 11 CB5 C8-1 C8-2 C8-3 C8-4 C8-5 C8-6 C8-7 C8-8 C8-9 C8-10 C8-11 C8-12 C8-13 C8-14 C8-15 C8-16 6 12 CA9 CB9 R EXT CB6 16 13 C9-1 C9-2 C9-3 C9-4 C9-5 C9-6 C9-7 C9-8 C9-9 C9-10 C9-11 C9-12 C9-13 C9-14 C9-15 C9-16 C FILT CB7 REXT 18 14 20k AD CB8 0.1 F 5 15 GND CB9 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 3.2mA when R = 20k. The LED current can be modulated by the R . Please refer to the EXT EXT detail information in Page 18. Integrated Silicon Solution, Inc. www.issi.com 1 Rev. B, 04/01/2014 IS31FL3731C PIN CONFIGURATION Package Pin Configuration (Top View) QFN-28 SSOP-28 Integrated Silicon Solution, Inc. www.issi.com 2 Rev. B, 04/01/2014