IS31FL3731

Audio Modulated Matrix LED Driver

The IS31FL3731 is a audio modulated matrix led driver from Integrated Silicon Solution, Inc.. View the full IS31FL3731 datasheet below including key specifications, electrical characteristics, absolute maximum ratings.

Manufacturer

Integrated Silicon Solution, Inc.

Key Specifications

Parameter	Value
Frame Memory	8 frames
Number Of LEDs	144
Shutdown Current	0.5μA (Typ.)
Average LED Current	3.2mA (when REXT = 20kΩ)
Supply Voltage Range	2.7V to 5.5V
Individual LED Dimming	8-bit (256 steps)
Communication Interface	I2C-compatible (400kHz)
Quiescent Supply Current	2.17mA (Typ.)
QFN-28 Package Dimensions	4mm x 4mm
Operating Temperature Range	-40°C to +85°C

Overview

Part: IS31FL3731 — Integrated Silicon Solution, Inc. Type: Audio Modulated Matrix LED Driver Description: A compact LED driver for 144 single LEDs, programmable via an I2C compatible interface, offering individual 8-bit dimming (256 steps) and audio signal modulation for LED frames.

Operating Conditions:

Supply voltage: 2.7V to 5.5V
Operating temperature: -40°C to +85°C
I2C clock frequency: up to 400 kHz

Absolute Maximum Ratings:

Max supply voltage: +5.5V
Max junction temperature: 150°C
Max storage temperature: +150°C

Key Specs:

Quiescent supply current: 2.17 mA (Typ, VCC=3.6V, LEDs off)
Shutdown current: 0.5 μA (Typ, V SDB = 0V)
Output current of C1~C9: 34 mA (Typ, Matrix display mode without audio modulation)
Current sink headroom voltage: 400 mV (Typ, I sink = 270mA)
Average current of each LED: 3.2 mA (Typ, R EXT = 20k Ω, PWM in 255 step)
SCL clock low period: 1.3 μs (Min)
SCL clock high period: 0.7 μs (Min)
Data setup time: 100 ns (Min)

Features:

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

Applications:

Mobile phones and other hand-held devices for LED display
LED in home appliances

Package:

QFN-28 (4mm × 4mm)
SSOP-28

Features

Supply voltage range: 2.7V to 5.5V
400kHz I2C-compatible 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

May 2013

Pin Configuration

Electrical Characteristics

TA = -40°C ~ +85°C, V CC = 2.7V ~ 5.5V, unless otherwise noted. Typical value is T A = 25°C, VCC = 3.6V.

Symbol	Parameter	Conditions	Min.	Typ.	Max.	Unit
V CC	Supply voltage		2.7		5.5	V
I CC	Quiescent power supply current	V IN = 0V, without audio input, all LEDs off		2.17		mA
I SD	Shutdown current	V SDB = 0V		0.5	5	μ A
I SD	Shutdown current	V SDB = V CC , software shutdown		230		μ A
I OUT	Output current of C1~C9	Matrix display mode without audio modulation		34 (Note 1)		mA
V HR	Current sink headroom voltage C1~C9	I sink = 270mA (Note 2)		400		mV
V HR	Current source headroom voltage C1~C9	I source = 34mA		400		mV
t SCAN	Period of scanning (Figure 2)			106		μs
t SCANOL	Non-overlap blanking time during scan (Figure 2)			15		μs
I LED	Average current of each LED	R EXT = 20k Ω , PWM in 255 step (Note 3)		3.2		mA
Logic Electrical Characteristics (SDA, SCL, AD)	Logic Electrical Characteristics (SDA, SCL, AD)	Logic Electrical Characteristics (SDA, SCL, AD)	Logic Electrical Characteristics (SDA, SCL, AD)	Logic Electrical Characteristics (SDA, SCL, AD)	Logic Electrical Characteristics (SDA, SCL, AD)	Logic Electrical Characteristics (SDA, SCL, AD)
V IL	Logic '0' input voltage	V CC = 2.7V			0.4	V
V IH	Logic '1' input voltage	V CC = 5.5V	1.4			V
I IL	Logic '0' input current	V INPUT = 0V		5 (Note 4)		nA
I IH	Logic '1' input current	V INPUT = V CC		5 (Note 4)		nA

Absolute Maximum Ratings

Supply voltage, V CC	- 0.3V ~ +5.5V
Voltage at any input pin	- 0.3V ~ V CC +0.3V
Maximum junction temperature, T JMAX	150°C
Storage temperature range, T STG	- 65°C ~ +150°C
Operating temperature range, T A	- 40°C ~ +85°C

Typical Application

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 REXT = 20k Ω . The LED current can be modulated by the REXT . Please refer to the detail information in Page 18 .

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