LP5521TM/NOPB National Semiconductor, LP5521TM/NOPB Datasheet - Page 16

• 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

www.national.com
LED Controller Operation Modes
Operation modes are defined in register address 01H. Each
output channel (R, G, B) operation mode can be configured
G_MODE
R_MODE
B_MODE
Name
Logarithmic and Linear PWM Adjustment Curves
Bit
5:4
3:2
1:0
Description
R channel operation mode
00b = Disabled, reset R channel PC
01b = Load program to SRAM, reset R channel PC
10b = Run program defined by R_EXEC
11b = Direct control, reset R channel PC
G channel operation mode
00b = Disabled, reset G channel PC
01b = Load program to SRAM, reset G channel PC
10b = Run program defined by G_EXEC
11b = Direct control, reset G channel PC
B channel operation mode
00b = Disabled, reset B channel PC
01b = Load program to SRAM, reset B channel PC
10b = Run program defined by B_EXEC
11b = Direct control, reset B channel PC
OP_MODE register (01H):
16
separately. MODE registers are synchronized to 32 kHz
clock. Delay between consecutive I
register (01H) need to be longer than 153 µs (typ).
20186218
2
C writes to OP_MODE