SG1845Y Microsemi Analog Mixed Signal Group, SG1845Y Datasheet - Page 8

• Manufacturer Part Number: SG1845Y
• Description: IC PWM CURRENT MODE 8-DIP
• Manufacturer: Microsemi Analog Mixed Signal Group

Specifications of SG1845Y

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 500kHz
• Duty Cycle: 50%
• Voltage - Supply: 8.3 V ~ 30 V
• Buck: Yes
• Boost: No
• Flyback: No
• 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

8
SG1844/SG1845 Series
FIGURE 5. — REFERENCE VOLTAGE vs. TEMPERATURE
FIGURE 7. — START-UP VOLTAGE THRESHOLD vs.
16.08
16.06
16.04
16.02
16.00
15.98
5.02
5.01
5.00
4.99
4.98
-75
-75
-50
-50
TEMPERATURE
Junction Temperature - (°C)
Junction Temperature - (°C)
-25
-25
0
0
V
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
CC
= 15V
25
25
C
SG1844
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
- M
100
100
O D E
125
125
P W M C
D
A T A
FIGURE 6. — START-UP VOLTAGE THRESHOLD vs.
FIGURE 8. — OSCILLATOR DISCHARGE CURRENT vs.
O N T R O L L E R
8.32
8.30
8.28
8.26
8.24
8.22
8.20
8.18
8.2
8.0
7.8
7.6
7.4
7.2
S
-75
-75
H E E T
-50
-50
TEMPERATURE
TEMPERATURE
Junction Temperature - (°C)
Junction Temperature - (°C)
-25
-25
0
0
25
25
SG1845
50
50
75
75
100
100
Copyright © 2000
Rev. 1.6c
125
125