TLC5905 Datasheet, PDF (20/27 Pages) Texas Instruments – LED DRIVER

TLC5905
LED DRIVER
SLLS401 – NOVEMBER 1999
noise reduction (continued)
PRINCIPLES OF OPERATION
4.9
3.2
2.5
1.48
0
0
–20
0
25
85
TA – Free–Air Temperature – °C
NOTES: A. This is based on simulation. When a TI recommended PCB is used, derate linearly at the rate of 39.4 mW/°C for operation above
25°C free-air temperature.
VCC(LOG)=VCC(ANA)=VCC(LED)= 5 V, IO(LC) = 80 mA, IC(C) is typical value.
B. The thermal impedance will be varied depending on mounting conditions. Since PAP package established low thermal
impedance by radiating heat from the thermal pad, the thermal pad should be soldered to the pattern with a low thermal
impedance.
C. The material for PCB should be selected considering the thermal characteristics since the temperature will rise around the
thermal pad.
Figure 7. Power Rating – Free-Air Temperature
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