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
GRAPH / CURVE INDEX
FIGURE INDEX
Characteristic Curves
Application Information
FIGURE #
FIGURE #
1. DROPOUT VOLTAGE vs. TEMPERATURE
13. OSCILLATOR TIMING CIRCUIT
2. OSCILLATOR TEMPERATURE STABILITY
14. OSCILLATOR FREQUENCY vs. RT FOR VARIOUS CT
3. CURRENT SENSE TO OUTPUT DELAY vs. TEMPERATURE
4. OUTPUT DUTY CYCLE vs. TEMPERATURE
Typical Applications Section
FIGURE #
5. START-UP CURRENT vs. TEMPERATURE
6. REFERENCE VOLTAGE vs. TEMPERATURE
15. CURRENT SENSE SPIKE SUPPRESSION
16. MOSFET PARASITIC OSCILLATIONS
17. BIPOLAR TRANSISTOR DRIVE
18. ISOLATED MOSFET DRIVE
7. START-UP VOLTAGE THRESHOLD vs. TEMPERATURE
8. START-UP VOLTAGE THRESHOLD vs. TEMPERATURE
9. OSCILLATOR DISCHARGE CURRENT vs. TEMPERATURE
10. OUTPUT SATURATION VOLTAGE vs. OUTPUT CURRENT AND
19. ADJUSTABLE BUFFERED REDUCTION OF CLAMP LEVEL WITH
TEMPERATURE (SINK TRANSISTOR)
SOFTSTART
11. CURRENT SENSE THRESHOLD vs. ERROR AMPLIFIER OUTPUT
20. EXTERNAL DUTY CYCLE CLAMP AND MULTI-UNIT
12. OUTPUT SATURATION VOLTAGE vs. OUTPUT CURRENT AND
SYNCHRONIZATION
TEMPERATURE (SOURCE TRANSISTOR)
21. OSCILLATOR CONNECTION
22. ERROR AMPLIFIER CONNECTION
23. SLOPE COMPENSATION
24. OPEN LOOP LABORATORY FIXTURE
25. OFF-LINE FLYBACK REGULATOR
Copyright © 2000
Rev. 1.6 4/00
6
MICROSEMI [ Microsemi ]
