LP55281RLX/NOPB National Semiconductor, LP55281RLX/NOPB Datasheet - Page 25

• Manufacturer Part Number: LP55281RLX/NOPB
• Description: IC LED DRIVER RGB 36-USMD
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: RGB LED Driverr

Specifications of LP55281RLX/NOPB

• Constant Current: Yes
• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 12
• Internal Driver: Yes
• Type - Primary: Light Management Unit (LMU)
• Type - Secondary: Color, RGB
• Frequency: 1MHz ~ 2MHz
• Voltage - Supply: 3 V ~ 5.5 V
• Voltage - Output: 4 V ~ 5.3 V
• Mounting Type: Surface Mount
• Package / Case: 36-MicroSMDxt
• Operating Temperature: -30°C ~ 85°C
• Current - Output / Channel: 300mA
• Internal Switch(s): Yes
• Efficiency: 88%
• For Use With: LP55281RLEV - BOARD EVAL FOR LP5528 RGB DRIVER
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LP55281RLX

LP55281 Registers
Following table summarizes the registers and their default values
Note: r/o = read-only
Address Register
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
0Ah
0Bh
0Ch
0Dh
0Eh
0Fh
10h
11h
12h
13h
60h
RED1
GREEN1
BLUE1
RED2
GREEN2
BLUE2
RED3
GREEN3
BLUE3
RED4
GREEN4
BLUE4
ALED
Audio Sync
CTRL1
Audio Sync
CTRL2
Boost Output
Frequency
Selections
Enables
LED Test
ADC Output
Reset
NSTBY
D7
r/o
R1 - IPLS[7:6]
G1 - IPLS[7:6]
R2 - IPLS[7:6]
G2 - IPLS[7:6]
R3 - IPLS[7:6]
G3 - IPLS[7:6]
R4 - IPLS[7:6]
G4 - IPLS[7:6]
0
0
B1 - IPLS[7:6]
0
0
0
B2 - IPLS[7:6]
0
0
0
B3 - IPLS[7:6]
0
0
0
B4 - IPLS[7:6]
0
0
0
0
0
0
GAIN_SEL[2:0]
EN_BOOS
D6
r/o
T
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Writing any data to Reset Register resets LP55281
EN_AUTO
FPWM1
LOAD
D5
r/o
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
25
EN_LTEST
DC_FREQ
FPWM0
D4
r/o
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
DATA[7:0]
ALED[7:0]
Boost[7:0]
EN_RGB4 EN_RGB3 EN_RGB2
EN_AGC
D3
r/o
0
G1_PWM[5:0]
0
0
0
G2_PWM[5:0]
0
0
0
G3_PWM[5:0]
0
0
0
G4_PWM[5:0]
0
0
0
0
0
1
0
0
0
R1_PWM[5:0]
B1_PWM[5:0]
R2_PWM[5:0]
B2_PWM[5:0]
R3_PWM[5:0]
B3_PWM[5:0]
R4_PWM[5:0]
B4_PWM[5:0]
EN_SYNC
THRESHOLD[3:0]
D2
r/o
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
MUX_LED[3:0]
0
0
FRQ_SEL[2:0]
SPEED_CTRL[1:0]
D1
r/o
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
1
0
0
0
EN_RGB1
www.national.com
D0
r/o
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
1
0
0
0