LT1249CS8 Linear Technology, LT1249CS8 Datasheet - Page 4

• Manufacturer Part Number: LT1249CS8
• Description: IC PFC CTRLR AVERAGE CURR 8SOIC
• Manufacturer: Linear Technology

Specifications of LT1249CS8

• Mode: Average Current
• Frequency - Switching: 100kHz
• Current - Startup: 250µA
• Voltage - Supply: 15.5 V ~ 27 V
• Operating Temperature: 0°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

LT1249
TYPICAL PERFORMANCE CHARACTERISTICS
4
400
300
200
100
10
0
9
8
7
6
5
4
3
2
1
0
10
Supply Current vs Supply Voltage
0
GTDR Rise and Fall Time
T
T
T
12
J
J
J
= –55 C
= 25 C
= 125 C
10
14
LOAD CAPACITANCE (nF)
FALL TIME
SUPPLY VOLTAGE (V)
16
7.536
7.524
7.512
7.500
7.488
7.476
7.464
7.452
7.440
7.428
20
18
NOTE: GTDR SLEWS
BETWEEN 1V AND 16V
20
–75
Reference Voltage vs
Temperature
RISE TIME
30
22
–50
24
JUNCTION TEMPERATURE ( C)
–25 0
W
40
26
28
1249 G08
1249 G05
U
25
30
50
50
75
18.5
18.0
17.5
17.0
16.5
16.0
15.5
15.0
14.5
14.0
13.5
13.0
550
500
450
400
350
300
250
200
150
100
100 125
50
0
0
GTDR Source Current
Start-Up Supply Current vs
Supply Voltage
0
1249 G03
V
2
CC
150
= 18V
– 60
4
SOURCE CURRENT (mA)
SUPPLY VOLTAGE (V)
6
T
T
–120
J
T
J
J
= 125 C
= –55 C
8
= 25 C
10
–180
12
14
300
150
–55 C
125 C
–240
25 C
0
16
Multiplier Current
0
18
1249 G06
1249 G09
VA
–300
OUT
20
VA
VA
= 5.5V
OUT
OUT
= 6V
= 6.5V
I
AC
140
130
120
110
100
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
250
90
80
70
( A)
0
–75
GTDR Sink Current
Switching Frequency
0
T
A
–50
= 125 C
T
A
60
= –55 C
T
–25
A
= 25 C
SINK CURRENT (mA)
TEMPERATURE ( C)
1249 G04
0
120
500
25
VA
VA
VA
VA
VA
VA
VA
OUT
OUT
OUT
OUT
OUT
OUT
OUT
180
50
= 5V
= 4.5V
= 4V
= 3.5V
= 3V
= 2.5V
= 2V
75
240
100
1249 G10
1249 G07
125
300