SG3845DM Microsemi Analog Mixed Signal Group, SG3845DM Datasheet - Page 7

• Manufacturer Part Number: SG3845DM
• Description: IC PWM CURRENT MODE 8SOIC
• Manufacturer: Microsemi Analog Mixed Signal Group

Specifications of SG3845DM

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 500kHz
• Duty Cycle: 50%
• Voltage - Supply: 8.2 V ~ 30 V
• Buck: Yes
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 8-SOIC
• Frequency-max: 500kHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Copyright © 2000
Rev. 1.6c
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
SG1845
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
SG1844
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. — START-UP CURRENT vs. TEMPERATURE
O N T R O L L E R
-10
0.7
0.6
0.5
0.4
0.3
0.2
-2
-4
-6
-8
S
2
0
-75
-75
H E E T
SG1844/SG1845 Series
-50
-50
Junction Temperature - (°C)
Junction Temperature - (°C)
-25
-25
0
0
SG1845
SG1844
25
25
V
Duty Cycle = 50%
IN
50
50
= 15V
75
75
100
100
125
125
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