SG1843Y Microsemi Analog Mixed Signal Group, SG1843Y Datasheet - Page 7

• Manufacturer Part Number: SG1843Y
• Description: IC PWM CURRENT MODE 8-DIP
• Manufacturer: Microsemi Analog Mixed Signal Group

Specifications of SG1843Y

• 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

Copyright © 2000
Rev. 1.6a 10/04
FIGURE 1. — DROPOUT VOLTAGE vs. TEMPERATURE
FIGURE 3. — CURRENT SENSE TO OUTPUT DELAY vs.
10.0
220
200
180
160
140
120
9.6
9.2
8.8
8.4
8.0
-75
-75
-50
-50
TEMPERATURE
Junction Temperature - (°C)
Junction Temperature - (°C)
-25
-25
SG1843
0
0
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
SG1842
25
25
C
U R R E N T
P
50
50
R O D U C T I O N
C H A R A C T E R I S T I C C U R V E S
75
75
V
PIN3
- M
= 1.1V
100
100
O D E
125
125
P W M C
D
A T A
FIGURE 2. — OSCILLATOR TEMPERATURE STABILITY
FIGURE 4. — OUTPUT DUTY CYCLE vs. TEMPERATURE
O N T R O L L E R
-10
50
49
48
47
46
45
44
-2
-4
-6
-8
S
2
0
-75
-75
H E E T
SG1842/SG1843 Series
200kHz
-50
-50
Junction Temperature - (°C)
Junction Temperature - (°C)
-25
-25
100kHz
50kHz
0
0
25
25
V
Duty Cycle = 50%
IN
50
50
100kHz
200kHz
= 15V
75
75
100
100
50kHz
125
125
7