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IS31FL3189

更新时间： 2024-11-11 12:23:07
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美国芯成 - ISSI 驱动器
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17页 434K
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AUDIO MODULATED LED DRIVER

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IS31FL3189  
AUDIO MODULATED LED DRIVER  
November 2011  
GENERAL DESCRIPTION  
FEATURES  
The IS31FL3189 is an LED driver with an audio  
synchronization mode that virtually eliminates the need  
of real time software processing for LED lighting  
effects.  
10 outputs each with 38.9mA at 0.4V headroom.  
2 independently controlled, 6 channels of 256  
steps PWM RGB LED drivers with programmable  
brightness and blinking patterns for LED’s lighting  
effects  
Fully programmable operating modes:  
Audio synchronization mode  
Audio synchronization +Top-down scan mode  
Top-down scan mode  
Constant current mode  
One Shot Programming mode with Gamma  
correction  
Interface intensity control mode with 256 steps  
current level setting for RGB lighting effects  
RGB blink/not blink with audio mode  
Each outputs enable/disable individually  
Programmable parameter setting:  
Audio gain setting  
Top-down scan mode output current setting  
Top-down scan mode scan rate setting  
RGB mode output current setting  
Programmable Output Current Level settings  
For Anode-common LEDs  
The OUT0~9 can be operated at 4 basic modes:  
Audio synchronization mode, top-down scan mode,  
constant current mode, combination of audio  
synchronization and top-down scan mode.  
Each of the OUT0~2, OUT7~9 is a constant current  
sink pulse width modulated in 256 steps, featuring One  
Shot Programming mode and Interface Intensity  
Control mode for RGB lighting effects. The output  
current is user selectable to be one of 5 levels, 17.5mA,  
28.9mA, 38.9mA, 46.7mA or 66.5mA (typical). At  
38.9mA the IS31FL3189 outputs require only 0.4V of  
headroom voltage.  
In One Shot Programming mode, the timing  
characteristics for output current - current ramping up,  
holding, ramping down and off time, can be adjusted  
individually so that each output can independently  
maintain a pre-established pattern without requiring  
any additional interface activity, thus saving valuable  
system resources.  
In Interface Intensity Control mode, the PWM duty  
cycle of each output can be independently  
programmed and controlled in 256 steps to simplify  
color mixing.  
VDD Range: 3.0V to 5.5V  
Package: QFN-20, 3mm × 3mm  
APPLICATIONS  
Cellular phones  
MP3/MP4/CD/minidiskplayers  
Digital picture frame/toys  
TYPICAL APPLICATION CIRCUIT  
Figure 1 Typical Application Circuit  
Integrated Silicon Solution, Inc. – www.issi.com  
Rev.A, 11/14/2011  
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