TLC5921_17 Datasheet, PDF (10/18 Pages) Texas Instruments – LED DRIVER

TLC5921
LED DRIVER
SLLS390 – SEPTEMBER 1999
PRINCIPLES OF OPERATION
power rating – free-air temperature
3.9
3.2
2.0
1.48
0
0
–20 0
25
85
TA – Free–Air Temperature – °C
NOTES: A. The data is based on simulation result. When TI recommended print circuit board is used, derate linearly at the rate of 31.4 mW/°C
for operation above 25°C free-air temperature. VCC=5 V, IO(LC) = 80 mA, ICC is typical value.
B. The thermal impedance will be varied depend on mounting conditions. Since PZP package established low thermal impedance by
radiating heat from thermal pad, the thermal pad should be soldered to pattern with 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 4. Power Rating
10
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