LP5521TMX/NOPB National Semiconductor, LP5521TMX/NOPB Datasheet - Page 36

• Manufacturer Part Number: LP5521TMX/NOPB
• Description: IC LED DRIVER RGB 25-USMD
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: RGB LED Driverr

Specifications of LP5521TMX/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: LP5521TMX

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G Channel Program Counter Value (G channel PC)
Address 0AH
Reset value 00H
PC registers are synchronized to 32 kHz clock. Delay between consecutive I
μs (typ.). PC register can be read or written only when EXEC mode is 'hold'.
B Channel Program Counter Value (B channel PC)
Address 0BH
Reset value 00H
PC registers are synchronized to 32 kHz clock. Delay between consecutive I
μs (typ.). PC register can be read or written only when EXEC mode is 'hold'.
STATUS/INTERRUPT Register
Address 0CH
Reset value 00H
Note: Register INT bits will be cleared when read operation to Status/Interrupt register occurs. INT output pin (active low) will go
high after read operation.
EXT_CLK
Name
G_PC
Name
B_PC
R_INT
G_INT
USED
B_INT
Name
7
7
7
Bit
3:0
Bit
3:0
Bit
6
6
6
3
2
1
0
Access
Access
R/W
R/W
Access
R
R
R
R
5
5
5
Active
Active
STATUS/INTERRUPT Register
G Channel PC Register
B Channel PC Register
Active
High
High
High
4
4
4
Description
G channel program counter value
Description
B channel program counter value
36
Description
External clock state
0 = Internal 32kHz clock used
1 = External 32kHz clock used
Interrupt from R channel
Interrupt from G channel
Interrupt from B channel
EXT_CLK
G_PC[3]
B_PC[3]
USED
3
3
3
2
2
C writes to PC registers needs to be longer than 153
C writes to PC registers needs to be longer than 153
G_PC[2]
B_PC[2]
R_INT
2
2
2
G_PC[1]
B_PC[1]
G_INT
1
1
1
G_PC[0]
B_PC[0]
B_INT
0
0
0