SG3842DM datasheet(6/14 Pages) MICROSEMI

6 / 14 page

C URRENT -M ODE PWM C ONTROLLER

SG1842/SG1843 Series

PRODUCT DA T ABOOK 1996/1997

Rev. 1.6

4/00

P RODUCTION D ATA S HEET

GRAPH / CURVE INDEX

Characteristic Curves

FIGURE #

DROPOUT VOLTAGE vs. TEMPERATURE

OSCILLATOR TEMPERATURE STABILITY

CURRENT SENSE TO OUTPUT DELAY vs. TEMPERATURE

OUTPUT DUTY CYCLE vs. TEMPERATURE

START-UP CURRENT vs. TEMPERATURE

REFERENCE VOLTAGE vs. TEMPERATURE

START-UP VOLTAGE THRESHOLD vs. TEMPERATURE

OSCILLATOR DISCHARGE CURRENT vs. TEMPERATURE

10. OUTPUT SATURATION VOLTAGE vs. OUTPUT CURRENT AND

TEMPERATURE (SINK TRANSISTOR)

11. CURRENT SENSE THRESHOLD vs. ERROR AMPLIFIER OUTPUT

12. OUTPUT SATURATION VOLTAGE vs. OUTPUT CURRENT AND

TEMPERATURE (SOURCE TRANSISTOR)

FIGURE INDEX

Application Information

FIGURE #

13. OSCILLATOR TIMING CIRCUIT

14. OSCILLATOR FREQUENCY vs. R

T FOR VARIOUS CT

Typical Applications Section

FIGURE #

15. CURRENT SENSE SPIKE SUPPRESSION

16. MOSFET PARASITIC OSCILLATIONS

17. BIPOLAR TRANSISTOR DRIVE

18. ISOLATED MOSFET DRIVE

19. ADJUSTABLE BUFFERED REDUCTION OF CLAMP LEVEL WITH

SOFTSTART

20. EXTERNAL DUTY CYCLE CLAMP AND MULTI-UNIT

SYNCHRONIZATION

21. OSCILLATOR CONNECTION

22. ERROR AMPLIFIER CONNECTION

23. SLOPE COMPENSATION

24. OPEN LOOP LABORATORY FIXTURE

25. OFF-LINE FLYBACK REGULATOR

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