LP3950 Datasheet, PDF (32/38 Pages) National Semiconductor (TI) – Color LED Driver with Audio Synchronizer

LP3950
SNVS331C – NOVEMBER 2004 – REVISED APRIL 2013
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ADDR
(HEX)
00
01
02
03
04
05
06
07
0B
0C
0D
2A
2B
Table 8. LP3950 Control Register Names and Default Values
SETUP
D7
D6
D5
D4
D3
D2
D1
D0
RGB
CONTROL
RED
ON/OFF
GREEN
ON/OFF
BLUE
ON/OFF
RED
SLOPE &
DUTY
CYCLE
GREEN
SLOPE &
DUTY
CYCLE
BLUE
SLOPE &
DUTY
CYCLE
CYCLE
PWM
ENABLES
BOOST
FREQUEN
CY
BOOST
OUTPUT
VOLTAGE
AUDIO
SYNC
CONTROL
1
AUDIO
SYNC
CONTROL
2
RGB PWM
0
RON[3]
0
GON[3]
0
BON[3]
0
RSLOPE[3]
0
RGB
START
0
RON[2]
0
GON[2]
0
BON[2]
0
RSLOPE[2]
0
RSW1
0
RON[1]
0
GON[1]
0
BON[1]
0
RSLOPE[1]
0
GSW1
0
RON[0]
0
GON[0]
0
BON[0]
0
RSLOPE[0]
0
BSW1
0
ROFF[3]
0
GOFF[3]
0
BOFF[3]
0
RDUTY[3]
0
RSW2
0
ROFF[2]
0
GOFF[2]
0
BOFF[2]
0
RDUTY[2]
0
GSW2
0
ROFF[1]
0
GOFF[1]
0
BOFF[1]
0
RDUTY[1]
0
BSW2
0
ROFF[0]
0
GOFF[0]
0
BOFF[0]
0
RDUTY[0]
0
GSLOPE[3] GSLOPE[2] GSLOPE[1] GSLOPE[0] GDUTY[3] GDUTY[2] GDUTY[1] GDUTY[0]
0
0
0
0
0
0
0
0
BSLOPE[3] BSLOPE[2] BSLOPE[1] BSLOPE[0] BDUTY[3] BDUTY[2] BDUTY[1] BDUTY[0]
0
0
0
0
0
0
0
0
CYCLE[1]
0
CYCLE[2]
0
BOOST[7]
0
CYCLE[0]
0
NSTBY
0
BOOST[6]
0
R1_PWM G1_PWM
0
0
EN_BOOST EN_FLASH
0
0
BOOST[5] BOOST[4]
1
1
B1_PWM
0
BOOST[3]
1
R2_PWM G2_PWM B2_PWM
0
0
0
AUTOLOAD RGB_SEL[1 RGB_SEL[0
_EN
]
]
1
1
1
FREQ_SEL[ FREQ_SEL[ FREQ_SEL[
2]
1]
0]
1
1
1
BOOST[2] BOOST[1] BOOST[0]
1
1
1
GAIN_SEL[2] GAIN_SEL[ GAIN_SEL[ SYNC_MO
1
1]
0]
DE
0
1
0
EN_AGC
1
EN_SYNC INPUT_SEL INPUT_SEL
0
[0]
[0]
1
0
MODE_CT MODE_CT SPEED_CT SPEED_CT
RL[1]
RL[0]
RL[1]
RL[0]
0
1
0
1
32
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