LT1247 Linear Technology, LT1247 Datasheet - Page 4

• Manufacturer Part Number: LT1247
• Description: 1MHz Off-Line Current Mode PWM and DC/DC Converter
• Manufacturer: Linear Technology

TYPICAL PERFOR
LT1246/LT1247
4
200
150
100
8.7
8.6
8.5
8.4
8.3
8.2
8.1
8.0
7.9
7.8
7.7
50
17
16
15
11
10
0
9
–50
–50
0
Start-Up Current
Oscillator Sink Current
LT1246 Undervoltage Lockout
THRESHOLD
V
PIN 4
START-UP
2
–25
–25
MINIMUM OPERATING VOLTAGE
LT1247
= 2V
4
START-UP THRESHOLD
0
0
TEMPERATURE ( C)
TEMPERATURE ( C)
6
25
25
V
8
CC
(V)
10
50
50
12
LT1246
75
75
T
14
W
J
LT1246 • TPC07
LT1246 • TPC01
= 25 C
1246/7 TPC04
100
100
16
A
U
125
125
18
CE
C
140
120
100
HARA TERISTICS
80
60
40
20
11
10
15
14
13
12
11
10
9
8
7
6
–50
–50
–50
LT1247 Undervoltage Lockout
Supply Current
Reference Short-Circuit Current
–25
–25
–25
MINIMUM OPERATING VOLTAGE
C
START-UP THRESHOLD
0
0
0
TEMPERATURE ( C)
TEMPERATURE ( C)
TEMPERATURE ( C)
25
25
25
50
50
50
V
R
C
75
75
CC
T
T
75
= 10k
= 3300pF
= 15V
LT1246 • TPC08
LT1246 • TPC05
100
100
100
1247 TPC02
125
125
125
5.05
5.04
5.03
5.02
5.01
5.00
4.99
4.98
4.97
4.96
4.95
200
180
160
140
120
100
–10
80
60
40
20
–4
–6
10
–2
–8
0
8
6
4
2
0
–50
–50
–50
Start-Up Current
Reference Voltage
Oscillator Frequency
I
O
V
–25
CC
–25
–25
= 1mA
= 15V
0
0
0
TEMPERATURE ( C)
TEMPERATURE (°C)
TEMPERATURE ( C)
25
25
25
50
50
50
75
75
75
LT1246 • TPC03
LT1246 • TPC09
LT1246 • TPC06
100
100
100
125
125
125