4-7 For the circuit in Figure 4-44, I_(bod)=50mA. Do the following:
a. Calculate V_(capacitor DC) and T_(s).
b. If T_(1) is less than the maximum allowable T_(3), assume a higher I_(bod) and repeat step a.
c. If T_(1) is above the maximum allowable T_(b), assume a lower I_(load) and repeat step a.
d. Continue steps b and c until you find a T_(1) that is within 10% of T_(J_(max)). This is I_(los) that causes thermal shutdown.
Figure 4-44 Schematic for Problem 4-7
4-7
For the circuit in Figure 4-44, It. = 50mA. Do the following: a. Calculate V_(capacitor DC) and T. b. If T, is less than the maximum allowable T, assume a higher I and repeat step a. c. If T, is above the maximum allowable T, assume a lower I... and repeat step a. d. Continue steps b and c until you find a T, that is within 10% of Tm. This is I, that causes thermal shutdown.
T=40C No heat sink LM340-5T In Out Gnd
120V RMS
load
12.6V RMS
0.1F
Figure 4-44 Schematic for Problem 4-7