P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
SG1842/SG1843 Series
C
U R R E N T - M O D E P W M C O N T R O L L E R
P R O D U C T I O N D A T A S H E E T
CHARACTERISTIC CURVES
FIGURE 9. — OSCILLATOR DISCHARGE CURRENT vs.
FIGURE 10. — OUTPUT SATURATION VOLTAGE vs.
TEMPERATURE
OUTPUT CURRENT & TEMPERATURE
8.2
8.0
7.8
7.6
2.5
2.0
-55°C
+25°C
1.5
+125°C
1.0
V
= 15V
IN
Duty Cycle < 5%
7.4
7.2
0.5
0
-75
-50
-25
0
25
50
75
100
125
100
200
300
400
500
Junction Temperature - (°C)
Output Current - (mA)
FIGURE 11. — CURRENT SENSE THRESHOLD vs.
FIGURE 12. — OUTPUT SATURATION VOLTAGE vs.
ERROR AMPLIFIER OUTPUT
OUTPUT CURRENT & TEMPERATURE
1.0
0.9
0.8
V
= 15V
IN
4.0
3.0
2.0
Duty Cycle < 5%
C
°
0.7
0.6
0.5
0.4
0.3
0.2
C
°
C
°
125
25
-55
C
°
-55
1.0
0
0.1
0
1.0
2.0
3.0
4.0
5.0
100
200
300
400
500
Error Amp Output Voltage - (V)
Output Current - (mA)
Copyright © 2000
Rev. 1.6 4/00
9
MICROSEMI [ Microsemi ]
