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LP3952RL/NOPB Datasheet(PDF) 20 Page - Texas Instruments

Part # LP3952RL/NOPB
Description  6-Channel Color LED Driver with Audio Synchronization
PDF  46 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

LP3952RL/NOPB Datasheet(HTML) 20 Page - Texas Instruments

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0
-100
kHz
0
4.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
-10
-20
-30
-40
-50
-60
-70
-80
-90
BANDPASS
LOWPASS
HIPASS
0
-100
kHz
0
8.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
-10
-20
-30
-40
-50
-60
-70
-80
-90
BANDPASS
LOWPASS
HIPASS
LP3952
SNVS518A – JULY 2007 – REVISED MARCH 2013
www.ti.com
Audio_sync_CTRL2 (2BH)
0 – averaging disabled (not applicable in audio sync mode)
EN_AVG
Bit 4
1 – averaging enabled (not applicable in audio sync mode)
MODE_CTRL[1:0]
Bits 3-2
See below: Mode control
Sets the LEDs light response time to audio input.
[00] = FASTEST (default)
[01] = FAST
SPEED_CTRL[1:0]
Bits 1-0
[10] = MEDIUM
[11] = SLOW
(For SLOW setting in amplitude mode fMAX= 3.8 Hz,
Frequency mode fMAX = 7.6 Hz)
MODE CONTROL IN FREQUENCY MODE (1.65V
≤ VDDIO ≤ VDD1,2V) (unless otherwise noted)
Mode control has two setups based on audio synchronization mode select: the frequency mode and the
amplitude mode. During the frequency mode user can select two filter options by MODE_CTRL as shown
below. User can select the filters based on the music type and light effect requirements. In the first mode the
frequency range extends to 8 kHz in the secont to 4 kHz.
The lowpass filter is used for the red, the bandpass filter for the blue and the hipass filter for the green LED.
Higher Frequency Mode
MODE_CTRL = 00 and SYNC_MODE = 1
Lower Frequency Mode
MODE_CTRL = 01 and SYNC_MODE = 1
MODE CONTROL IN AMPLITUDE MODE (1.65V
≤ VDDIO ≤ VDD1,2V) (unless otherwise noted)
During the amplitude synchronization mode user can select between three different amplitude mappings by
using MODE_CTRL select. These three mapping options give different light response. The modes are presented
in the following graphs.
20
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Copyright © 2007–2013, Texas Instruments Incorporated
Product Folder Links: LP3952



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