SN3199

Dec. 2010 P0.1 SI-EN Technology

9-Channel Fun LED Driver

Description

SN3199 is a 9-channel fun LED driver which features

two-dimensional auto breathing mode and an audio

modulated display mode. It has One Shot Programming

mode and PWM Control mode for RGB lighting effects.

The maximum output current can be adjust in 8 levels

(5mA~40mA).

In PWM Control mode, the PWM duty cycle of each

output can be independently programmed and controlled

in 256 steps to simplify color mixing. In One Shot

Programming mode, the timing characteristics for output

current - current rising, holding, falling and off time, can

be adjusted individually so that each output can

independently maintain a pre-established pattern

achieving mixing color breathing or a single color

breathing without requiring any additional interface

activity, thus saving valuable system resources.

The SN3199 includes an audio modulated display mode,

wherein the brightness of LED can be modulated by audio

signal. There is a cascade pin for the synchronization of

two chips.

SN3199 is available in QFN-20 (3mm × 3mm). It

operates from 2.7V to 5.5V over the temperature range of

-40°C to +85°C.

Features

z 2.7V to 5.5V supply voltage

z I2C interface, automatic address increment function

z Three groups RGB, single color LED breathing

system-free pre-established pattern

z 9 independently controlled automatic and

semiautomatic breathing system-free pre-established

pattern

z 9 independently controlled outputs of 256 PWM

steps

z 8 levels programmable output current

z Audio mode with AGC function

z Cascade for the synchronization of chips

z Over-temperature protection

z QFN-20 (3mm × 3mm) package

Applications

z Mobile phones and other hand-held devices for LED

display

z LED in home appliances

Typical Application Circuit

Figure 1 Typical Application Circuit