MC44603 Datasheet, PDF (8/24 Pages) ON Semiconductor – MIXED FREQUENCY MODE GREENLINE PWM CONTROLLER

MC44603
Figure 13. Current Sense Gain
versus Temperature
3.2
3.1
3.0
Figure 14. Thermal Resistance and Maximum
Power Dissipation versus P.C.B. Copper Length
100
80
60
R_θJA
Printed circuit board heatsink example
ÉÉÉÉÉ _L
2.0 oz
Copper
ÉÉÉÉÉÉÉÉÉÉ _L
3.0 mm
5.0
4.0
3.0
Graphs represent symmetrical layout
40
2.0
2.9
VCC = 12 V
Rref = 10 k
20
PD(max) for TA = 70°C
1.0
CT = 820 pF
2.8
0
0
–50
–25
0
25
50
75
100
0
10
20
30
40
50
TA, AMBIENT TEMPERATURE (°C)
L, LENGTH OF COPPER (mm)
Figure 15. Propagation Delay Current Sense
Input to Output versus Temperature
140
120
100
80
–50
VCC = 12 V
Rref = 10 k
CT = 820 pF
–25
0
25
50
75
100
TA, AMBIENT TEMPERATURE (°C)
Figure 16. Startup Current versus VCC
0.35
0.30
0.25
0.20
0.15
0.10
Rref = 10 k
CT = 820 pF
0.05
0
0 2.0
4.0
6.0 8.0
10
VCC, SUPPLY VOLTAGE (V)
12 14
Figure 17. Supply Current versus
Supply Voltage
16
14
12
10
8.0
6.0 ^{TA = 25°C}
Rref = 10 k
4.0 CT = 820 pF
VFB = 0 V
2.0 _{VCS = 0 V}
0
2.0 4.0 6.0 8.0
10
12
14
16
VCC, SUPPLY VOLTAGE (V)
8
Figure 18. Power Supply Zener Voltage
versus Temperature
21.5
21.0
20.5
20.0
19.5
19.0
–50
ICC = 25 mA
–25
0
25
50
75
100
TA, AMBIENT TEMPERATURE (°C)
MOTOROLA ANALOG IC DEVICE DATA