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LT1186F Datasheet(PDF) 6 Page - Linear Technology

Part # LT1186F
Description  DAC Programmable CCFL Switching Regulator(Bits-to-NitsTM)
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LT1186F Datasheet(HTML) 6 Page - Linear Technology

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6
LT1186F
TYPICAL PERFORMANCE CHARACTERISTICS
BULB Input Bias Current
vs Temperature
High-Side Sense Null Current Line
Regulation vs Temperature
VC Switching Threshold
vs Temperature
TEMPERATURE (
°C)
–75
0.6
0.7
0.9
1.0
1.1
1.3
–50
50
100
LT1186F • G16
0.8
1.2
25
150 175
–25 0
75
125
TEMPERATURE (
°C)
6
8
10
LT1186F • G18
4
2
0
–75
125 150
–25 0
–50
25 50
75 100
175
High-Side Sense Supply Current
vs Temperature
TEMPERATURE (
°C)
–75
110
130
150
140
120
100
80
60
125 150
LT1186F • G19
90
70
50
–25 0
–50
25 50
75 100
175
TEMPERATURE (
°C)
0.940
0.980
0.960
1.020
1.000
1.060
1.040
–25
25
75
125
LT1186F • G20
175
–50
–75
0
50
100
150
High-Side Sense Null
Current vs Temperature
TEMPERATURE (
°C)
–75
0.120
0.160
125
LT1186F • G21
0.080
0.040
0.000
–25
25
75
175
0.100
0.140
0.060
0.020
100
–50
0
50
150
SWITCH CURRENT (A)
0
0.6
0.8
1.0
1.2
LT1186F • G22
0.4
0.2
0.5
0.7
0.9
0.3
0.1
0
0.3
0.6
0.9
1.5
T = –5
°C
T = 125
°C
T = 25
°C
Forced Beta vs ISW on VSW
CCFL ISW (A)
0
60
80
110
100
1.6
LT1186F • G24
40
20
50
70
90
30
10
0
0.4
0.8
1.2
0.2
1.8
0.6
1.0
1.4
2.0
BULB Protect Servo Voltage
vs Temperature
TEMPERATURE (
°C)
–75
7.1
7.3
7.5
7.4
7.2
7.0
6.8
6.6
125 150
LT1186F • G17
6.9
6.7
6.5
–25 0
–50
25 50
75 100
175
ICCFL = 10µA
ICCFL = 50µA
ICCFL = 100µA
DUTY CYCLE (%)
0
0
0.5
1.5
2.0
2.5
20
40
50
90
LT1186F • G23
1.0
10
30
60
70
80
T = 25
°C
T = 125
°C
MINIMUM
T = 0
°C
VSW Current Limit vs Duty Cycle
VSW Sat Voltage
vs Switch Current


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