IS31FL3730 AUDIO MODULATED MATRIX LED DRIVER DESCRIPTION RECOMMENDED EQUIPMENT IS31FL3730 is a LED matrix driver which features an 5.0V, 2A power supply audio modulation display mode and a general LED dot Audio source ( i.e. MP3 player, Notebook PC, etc) matrix display mode. The default configuration of 8 speaker IS31FL3730 is to drive a single 88 LED matrix. However, IS31FL3730 may be configured to drive either one or two 88, 79, 610, or 511 dot matrix ABSOLUTE MAXIMUM RATINGS display(s). The intensity of any matrix picture can be modulated by an audio signal. 5.5V power supply Caution: Do not exceed the conditions listed above, otherwise In the general purpose mode, the ON or OFF condition the board will be damaged. of each individual LED in the display matrix is programmed via an I2C interface. PROCEDURE FEATURES The IS31FL3730 evaluation board is fully assembled Supply voltage range from 2.7V to 5.5V and tested. Follow the steps listed below to verify I2C interface, automatic address increment board operation. function Caution: Do not turn on the power supply until all connections One-time programming, internal scan are completed. Audio modulated display intensity with digitally 1) Connect an 8 speaker to the SPK connector. programmable input gain 2) Connect the audio source to the AUDIO IN Internal registers to digitally adjust display Intensity connector. Modulate LED brightness with 128 different items 3) Connect the DC power to the connector (DC IN). in PWM 4) Turn on the power supply and pay attention to the One address pin with 4 logic levels to allow four supply current. If the current exceeds 1A, please I2C slave addresses check for circuit fault. QFN-24 (4mm 4mm) package 5) Turn on the audio signal. 6) Modulation of the audio signal utilized to obtain QUICK START better sound output performance. Figure 1: Photo of IS31FL3730 Evaluation Board ORDERING INFORMATION Part No. Temperature Range Package IS31FL3730-QFLS2-EB -40C to +85C (Industrial) QFN-24, Lead-free Table 1: Ordering Information For pricing, delivery, and ordering information, please contacts Lumissils analog marketing team at analog Lumissil.com or (408) 969-6600. Lumissil Microsystems www.lumissil.com 1 Rev. A, 07/12/2012 IS31FL3730 AUDIO MODULATED MATRIX LED DRIVER EVALUATION BOARD OPERATION SOFTWARE SUPPORT JP1 default setting is close circuit. If it is set to open, The IS31FL3730 evaluation board has six display modes. Press MODE button to switch configurations. the on-board MCU will stop working. The I2C pins are set to High Impedance. External I2C signals can be 1) (Default Mode) A little man is dancing and change connected to TP3 to control the IS31FL3730 LED postures according to music rhythm. driver. 2) Display Chinese characters ,,,, etc one Please refer to the datasheet to get more information about by one, then move to left to display more IS31FL3730. characters. 3) Display Hart shape, Butterfly, Lock, Little Man, etc graphics with breathing dimming effect. 4) Flying butterfly. 5) Hart shape animation. 6) Combined shapes animation. Note: IS31FL3730 solely controls the FxLED function on the evaluation board. Figure 2: IS31FL3730 Application Schematic Lumissil Microsystems www.lumissil.com 2 Rev. A, 07/12/2012