LP5521TM/NOPB National Semiconductor, LP5521TM/NOPB Datasheet - Page 31

• Manufacturer Part Number: LP5521TM/NOPB
• Description: IC LED DRIVER RGB 25-USMD
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: RGB LED Driverr

Specifications of LP5521TM/NOPB

• Constant Current: Yes
• Topology: PWM, Switched Capacitor (Charge Pump)
• Number Of Outputs: 3
• Internal Driver: Yes
• Type - Primary: Backlight, Light Management Unit (LMU)
• Type - Secondary: RGB
• Frequency: 1.25MHz
• Voltage - Supply: 2.7 V ~ 5.5 V
• Voltage - Output: 4.55V
• Mounting Type: Surface Mount
• Package / Case: 20-MicroSMD
• Operating Temperature: -30°C ~ 85°C
• Current - Output / Channel: 25.5mA
• Internal Switch(s): Yes
• Efficiency: 95%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LP5521TMTR

Enable Register (ENABLE)
Address 00H
Reset value 00H
EXEC registers are synchronized to 32 kHz clock. Delay between consecutive I
longer than 488 μs (typ).
CHIP_EN
LOG_EN
R_EXEC
G_EXEC
B_EXEC
LOG_EN
Name
7
CHIP_EN
Bit
5:4
3:2
1:0
7
6
6
Access
R/W
R/W
R/W
R/W
R/W
R_EXEC[1]
5
Active
High
High
R_EXEC[0]
4
Enable Register
Description
Logarithmic PWM adjustment generation enable
Master chip enable. Enables device internal start-up sequence. See
Modes of Operation for further information. Setting EN pin low resets
the CHIP_EN state to 0.
R channel program execution.
00b = Hold: Wait until current command is finished then stop while
EXEC mode is hold. PC can be read or written only in this mode.
01b = Step: Execute instruction defined by current R channel PC value,
increment PC and change R_EXEC to 00b (Hold)
10b = Run: Start at program counter value defined by current R Channel
PC value
11b = Execute instruction defined by current R channel PC value and
change R_EXEC to 00b (Hold)
G channel program execution
00b = Hold: Wait until current command is finished then stop while
EXEC mode is hold. PC can be read or written only in this mode.
01b = Step: Execute instruction defined by current G channel PC value,
increment PC and change G_EXEC to 00b (Hold)
10b = Run: Start at program counter value defined by current G Channel
PC value
11b = Execute instruction defined by current G channel PC value and
change G_EXEC to 00b (Hold)
B channel program execution
00b = Hold: Wait until current command is finished then stop while
EXEC mode is hold. PC can be read or written only in this mode.
01b = Step: Execute instruction defined by current B channel PC value,
increment PC and change B_EXEC to 00b (Hold)
10b = Run: Start at program counter value defined by current B Channel
PC value
11b = Execute instruction defined by current B channel PC value and
change B_EXEC to 00b (Hold)
31
G_EXEC[1]
3
2
C writes to ENABLE register (00H) need to be
G_EXEC[0]
2
B_EXEC[1]
1
B_EXEC[0]
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