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LTC4258 Datasheet(PDF) 7 Page - Linear Technology

Part # LTC4258
Description  Synchronous No-Opto Flyback Controller
Download  42 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC4258 Datasheet(HTML) 7 Page - Linear Technology

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LTC4278
7
4278fc
TEMPERATURE (°C)
–50
8
9
25
75
4278 G12
7
6
–25
0
50
100
125
5
4
3
10
DYNAMIC CURRENT CPG = 1nF,
CSG = 1nF, fOSC = 100kHz
STATIC PART CURRENT
VCC = 14V
TEMPERATURE (°C)
–50
90
92
96
98
100
110
104
0
50
75
4278 G13
94
106
108
102
–25
25
100 125
FB = 1.1V
SENSE = VSENSE+
WITH VSENSE– = 0V
TEMPERATURE (°C)
–50
215
25
4278 G14
200
190
–25
0
50
185
180
220
210
205
195
75
100 125
SENSE = VSENSE+
WITH VSENSE– = 0V
TEMPERATURE (°C)
–50
90
92
96
98
100
110
104
0
50
75
4278 G15
94
106
108
102
–25
25
100 125
COSC = 100pF
TEMPERATURE (°C)
–50
1.230
1.231
1.233
1.234
1.235
1.240
1.237
0
50
75
4278 G16
1.232
1.238
1.239
1.236
–25
25
100 125
TEMPERATURE (°C)
–50
200
250
300
25
75
4278 G17
150
100
–25
0
50
100
125
50
0
RCMP OPEN
TEMPERATURE (°C)
–50
1.03
25
4278 G18
1.00
0.98
–25
0
50
0.97
0.96
1.04
1.02
1.01
0.99
75
100 125
TYPICAL PERFORMANCE CHARACTERISTICS
VCC Shutdown Current
vs Temperature
VCC Current vs Temperature
SENSE Voltage vs Temperature
SENSE Fault Voltage
vs Temperature
Oscillator Frequency
vs Temperature
VFB vs Temperature
Feedback Pin Input Bias
vs Temperature
VFB Reset vs Temperature
TEMPERATURE (°C)
–50
60
80
90
25
75
4278 G02
40
50
70
30
20
–25
0
50
100
125
10
0
VCC = 14V
VUVLO = 0
VFB (V)
0.9
–70
–50
–30
–10
70
30
1
1.1
1.4
50
10
1.2
1.3
1.5
4278 G19
125°C
25°C
–40°C
Feedback Amplifier Output
Current vs VFB


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