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LP3952 Datasheet, PDF (23/44 Pages) National Semiconductor (TI) – 6-Channel Color LED Driver with Audio Synchronization
RGB Driver Electrical Characteristics (R1, G1, B1, R2, G2, B2 Outputs)
Symbol
ILEAKAGE
IRGB
RSW
fRGB
Parameter
R1, G1, B1, R2, G2, B2 pin leakage
current
Maximum recommended sink current
Accuracy @ 37mA
Current mirror ratio
RGB1 and RGB2 current mismatch
Switch resistance
RGB switching frequency
Condition
Min Typ Max Units
0.1
1
μA
CC mode
40
mA
SW mode
50
mA
RRGB=3.3 kΩ ±1%, CC mode
CC mode
±5
%
1:100
IRGB=37mA, CC mode
SW mode
±5
%
2.5
5
Ω
Accuracy proportional to internal clock 18.2
20
21.8 kHz
freq.
Note: RGB current should be limited as follows:
constant current mode – limit by external RRGB resistor;
switch mode – limit by external ballast resistors
Output Current vs Pin Voltage (Current Sink Mode)
Pin Voltage vs Output Current (Switch Mode)
30023866
Output Current vs RRGB (Current Sink Mode)
30023868
30023867
23
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