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LTC4264 Datasheet(PDF) 6 Page - Linear Technology

Part # LTC4264
Description  Synchronous No-Opto Flyback Controller
PDF  42 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4264 Datasheet(HTML) 6 Page - Linear Technology

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LTC4278
6
4278fc
Signature Resistance
vs Input Voltage
PWRGD, T2P Output Low Voltage
vs Current
Active High PWRGD
Output Low Voltage vs Current
Inrush Current vs Input Voltage
CURRENT (mA)
0
0.4
0.6
8
4278 G07
0.2
0
2
4
6
10
0.8
TA = 25°C
!
CURRENT (mA)
0
0
0.4
1.0
0.5
1
4278 G08
0.2
0.8
0.6
1.5
2
TA = 25°C
VPORTP – VNEG = 4V
VPORTP VOLTAGE (V)
40
85
115
45
50
4278 G09
55
60
90
100
105
110
95
90
100
105
110
95
Class Operation vs Time
On-Resistance vs Temperature
VPORTP VOLTAGE (V)
1
22
V1:
V2:
23
25
26
27
3
5
4278 G04
24
7
9
6
10
2
4
8
28
RESISTANCE =
DIODES: HD01
TA = 25°C
=
ΔV
ΔI
V2 – V1
I2 – I1
IEEE UPPER LIMIT
IEEE LOWER LIMIT
LTC4278 ONLY
!
LTC4278 + 2 DIODES
VPORTP
VOLTAGE
10V/DIV
CLASS
CURRENT
10mA/DIV
TIME (10µs/DIV)
4278 G05
TA = 25°C
!
JUNCTION TEMPERATURE (°C)
–50
0.2
0.4
0.6
0.8
1.0
–25
0
25
50
4278 G06
75
100
TYPICAL PERFORMANCE CHARACTERISTICS
Input Current vs Input Voltage
25k Detection Range
Input Current vs Input Voltage
Input Current vs Input Voltage
VPORTP VOLTAGE (V)
0
0
0.1
0.2
0.3
0.4
0.5
2
4
6
8
4278 G01
10
TA = 25°C
VPORTP VOLTAGE (V)
(RISING)
0
0
10
20
30
40
50
10
20
30
40
4278 G02
50
60
TA = 25°C
CLASS 4
CLASS 3
CLASS 2
CLASS 1
CLASS 0
!
VPORTP VOLTAGE (V)
12
9.5
10.5
14
16
4278 G03
10.0
18
20
22
11.0
85°C
–40°C
CLASS 1 OPERATION
!



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