IS31FL3732A AUDIO MODULATED MATRIX LED DRIVER July 2017 GENERAL DESCRIPTION FEATURES The IS31FL3732A is a compact LED driver for 144 Supply voltage range: 2.7V to 5.5V single LEDs. The device can be programmed via an 1MHz I2C-compatible interface I2C compatible interface. The IS31FL3732A offers two 144 LEDs in dot matrix blocks each driving 72 LEDs with 1/9 cycle rate. The Individual blink control required lines to drive all 144 LEDs are reduced to 18 Individual PWM control 256 steps by using the cross-plexing feature optimizing space on Individual on/off control the PCB. Additionally each of the 144 LEDs can be dimmed individually with 8-bit allowing 256 steps of Global current control 256 steps linear dimming. Cascade for synchronization of chips 8 frames memory for animations To reduce CPU usage up to 8 frames can be stored with individual time delays between frames to play Picture mode and animation mode small animations automatically. LED frames can be Auto intensity breathing during the switching of modulated with audio signal. different frames LED frames displayed can be modulated with IS31FL3732A is available in QFN-40 (5mm5mm) audio signal intensity package. It operates from 2.7V to 5.5V over the LED light intensity can be modulated with audio temperature range of -40C to +85C. signal intensity QFN-40 (5mm5mm) package APPLICATIONS Mobile phones and other hand-held devices for LED display LED in home appliances TYPICAL APPLICATION CIRCUIT Figure 1 Typical Application Circuit Note 1: For the mobile applications 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. Note 3: The thermal pad should be connected to GND. Note 4: The V should be 1.8V V V . And it is recommended to be equal to V of the micro controller. For example, if V =1.8V, set IO IO CC OH OH V =1.8V is recommended. IO Lumissil Microsystems www.lumissil.com 1 Rev. C, 07/04/2017 IS31FL3732A VBattery VIO 1,20 27 PVCC VIO 1 F 0.1 F 0.1 F 1 F 26 AVCC 32 1 F 0.1 F CA1 A1 4 33 Matrix A Matrix B VCC CA2 A2 34 A1 B1 1 F 0.1 F CA3 A3 35 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 CA4 A4 A2 B2 V 36 IO CA5 A5 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 37 A3 B3 100k 1k 1k CA6 A6 38 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 21 CA7 A7 A4 B4 SDA 39 22 CA8 A8 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 SCL 40 A5 B5 Micro 5 CA9 A9 Controller IS31FL3732A INTB 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 25 11 A6 B6 SDB CB1 B1 12 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 100k CB2 B2 A7 B7 13 CB3 B3 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 14 A8 B8 CB4 B4 0.22 F 6 15 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 Audio In IN CB5 B5 A9 B9 16 30 CB6 B6 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 SYNC 17 CB7 B7 28 18 R EXT CB8 B8 29 19 C FILT CB9 B9 REXT 24 20k ADDR1 0.1 F 23 7~9,31 ADDR2 GND VBattery VIO 23 27 ADDR2 VIO 1,20 0.1 F 1 F PVCC 1 F 0.1 F 26 32 AVCC CA1 C1 33 1 F 0.1 F CA2 C2 4 34 Matrix C Matrix D VCC CA3 C3 35 C1 D1 1 F 0.1 F CA4 C4 36 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 CA5 C5 C2 D2 37 CA6 C6 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 38 C3 D3 CA7 C7 39 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 21 CA8 C8 C4 D4 SDA 40 22 CA9 C9 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 SCL C5 D5 5 11 IS31FL3732A INTB CB1 D1 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 25 12 C6 D6 SDB CB2 D2 13 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 CB3 D3 C7 D7 14 CB4 D4 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 15 C8 D8 CB5 D5 0.22 F 6 16 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 Audio In IN CB6 D6 C9 D9 17 30 CB7 D7 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 SYNC 18 CB8 D8 28 19 R EXT CB9 D9 29 REXT 0.1 F C FILT 20k 24 7~9,31 ADDR1 GND Figure 2 Typical Application Circuit (Two Parts Synchronization-Work) Lumissil Microsystems www.lumissil.com 2 Rev. C, 07/04/2017