SG1842Y Microsemi Analog Mixed Signal Group, SG1842Y Datasheet - Page 6

• Manufacturer Part Number: SG1842Y
• Description: IC PWM CURRENT MODE 8-DIP
• Manufacturer: Microsemi Analog Mixed Signal Group

Specifications of SG1842Y

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 500kHz
• Duty Cycle: 100%
• Voltage - Supply: 8.3 V ~ 30 V
• Buck: No
• Boost: No
• Flyback: Yes
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: -55°C ~ 125°C
• Package / Case: 8-DIP
• Frequency-max: 500kHz
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS compliant by exemption

SG1842/SG1843 Series
6
FIGURE #
1.
2.
3.
4.
5.
6.
7.
8.
9.
10. OUTPUT SATURATION VOLTAGE vs. OUTPUT CURRENT AND
11. CURRENT SENSE THRESHOLD vs. ERROR AMPLIFIER OUTPUT
12. OUTPUT SATURATION VOLTAGE vs. OUTPUT CURRENT AND
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
START-UP VOLTAGE THRESHOLD vs. TEMPERATURE
OSCILLATOR DISCHARGE CURRENT vs. TEMPERATURE
TEMPERATURE (SINK TRANSISTOR)
TEMPERATURE (SOURCE TRANSISTOR)
GRAPH / CURVE INDEX
Characteristic Curves
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
C
U R R E N T
P
R O D U C T I O N
- M
O D E
P W M C
D
A T A
FIGURE #
13. OSCILLATOR TIMING CIRCUIT
14. OSCILLATOR FREQUENCY vs. R
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
20. EXTERNAL DUTY CYCLE CLAMP AND MULTI-UNIT
21. OSCILLATOR CONNECTION
22. ERROR AMPLIFIER CONNECTION
23. SLOPE COMPENSATION
24. OPEN LOOP LABORATORY FIXTURE
25. OFF-LINE FLYBACK REGULATOR
SOFTSTART
SYNCHRONIZATION
O N T R O L L E R
S
H E E T
Typical Applications Section
Application Information
FIGURE INDEX
T
FOR VARIOUS C
T
Copyright © 2000
Rev. 1.6a 10/04