PRODUCT DATABOOK 1996/1997
SG1842/SG1843 Series
C
URRENT
-M
ODE
PWM C
ONTROLLER
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.
TEMPERATURE
8.2
FIGURE 10.
— OUTPUT SATURATION VOLTAGE vs.
OUTPUT CURRENT & TEMPERATURE
2.5
Oscillator Discharge Current - (mA)
8.0
2.0
Saturation Voltage - (V)
C
-55°
°C
+25
7.8
1.5
5°C
+12
7.6
1.0
V
IN
= 15V
Duty Cycle < 5%
0.5
7.4
7.2
-75
-50
-25
0
25
50
75
100
125
0
100
200
300
400
500
Junction Temperature - (°C)
Output Current - (mA)
FIGURE 11.
— CURRENT SENSE THRESHOLD vs.
ERROR AMPLIFIER OUTPUT
1.0
0.9
FIGURE 12.
— OUTPUT SATURATION VOLTAGE vs.
OUTPUT CURRENT & TEMPERATURE
Current Sense Threshold - (V)
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
1.0
2.0
3.0
4.0
5.0
4.0
Saturation Voltage - (V)
12
5
°
C
25
°
C
-55
°
C
V
IN
= 15V
Duty Cycle < 5%
C
5
°
12
+
5
°
C
+2
3.0
°
C
-55
°
C
+25
2.0
5
°
C
+12
1.0
0
100
200
300
400
500
Error Amp Output Voltage - (V)
Output Current - (mA)
Copyright © 2000
Rev. 1.6a
10/04
9
MICROSEMI [ MICROSEMI CORPORATION ]
