LT1508CN Linear Technology, LT1508CN Datasheet - Page 5

• Manufacturer Part Number: LT1508CN
• Description: IC PWM/POWER FACTOR CNTRLR 20DIP
• Manufacturer: Linear Technology

Specifications of LT1508CN

• Mode: Average Current
• Frequency - Switching: 100kHz
• Voltage - Supply: 27V
• Operating Temperature: 0°C ~ 100°C
• Mounting Type: Through Hole
• Package / Case: 20-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Startup: -

TYPICAL PERFORMANCE CHARACTERISTICS
500
450
400
350
300
250
200
150
100
16
15
14
13
12
11
10
50
9
8
7
6
5
0
200
10
Supply Current vs Supply Voltage
Frequency vs R
T
T
J
J
600
= –55 C
= 125 C
7.536
7.524
7.512
7.500
7.488
7.476
7.464
7.452
7.440
7.428
C
SUPPLY VOLTAGE (V)
SET
–75
1000
Reference Voltage
vs Temperature
CAPACITANCE (pF)
–50
SET
T
J
21
= 25 C
JUNCTION TEMPERATURE ( C)
–25 0
and C
1400
SET
R
R
R
R
W
1800
SET
SET
SET
SET
25
= 10k
= 15k
= 20k
= 30k
1508 G06
1508 G09
50
U
2200
32
75
100 125
1508 G04
1.00
0.99
0.98
0.97
0.96
0.95
0.94
0.93
0.92
0.91
0.90
400
300
200
100
0
150
200
0
GTDR Rise and Fall Time
GTDR1 Maximum Duty Cycle
vs R
SET
10
600
LOAD CAPACITANCE (nF)
and C
C
FALL TIME
SET
1000
CAPACITANCE (pF)
20
SET
NOTE: GTDR SLEWS
BETWEEN 1V AND 16V
RISE TIME
1400
30
R
R
R
R
SET
SET
SET
SET
1800
40
300
150
= 10k
= 15k
= 20k
= 30k
0
1508 G07
1508 G10
0
Multiplier Current
2200
50
VA
VA
OUT
OUT
VA
= 6V
= 6.5V
OUT
–0.5
–1.0
–1.5
–2.0
–2.5
–3.0
–3.5
–4.0
550
500
450
400
350
300
250
200
150
100
1.5
1.0
0.5
50
= 7V
I
0
0
AC
0
250
Start-Up Supply Current
vs Supply Voltage
M
( A)
OUT
–2.4
2
Pin Characteristics
T
T
T
4
J
J
J
= 125 C
= 25 C
= –55 C
–1.2
SUPPLY VOLTAGE (V)
6
M
OUT
8
1508 G05
VOLTAGE (V)
10
500
0
VA
VA
VA
VA
VA
VA
VA
12
OUT
OUT
OUT
OUT
OUT
OUT
OUT
LT1508
14
1.2
= 3.5V
= 5.5V
= 5V
= 4.5V
= 4V
= 3V
= 2.5V
–55 C
125 C
25 C
16
18
2.4
1508 G08
1508 G11
5
20