LT1184F_15 Datasheet, PDF (7/24 Pages) Linear Technology – CCFL/LCD Contrast Switching Regulators

LT1182/LT1183/LT1184/LT1184F
TYPICAL PERFORMANCE CHARACTERISTICS
CCFL V_C Switching Threshold
Voltage vs Temperature
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
–75 – 50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
LT1182 • G19
LCD V_C Switching Threshold
Voltage vs Temperature
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
–75 – 50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
LT1182 • G22
CCFL High-Side Sense Supply
Current vs Temperature
150
140
130
120
110
100
90
80
70
60
50
–75 – 50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
LT1182 • G25
LCD V_C Low Clamp Voltage
vs Temperature
1.00
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.10
0
–75 –50 –25 0 25 50 75 100 125
TEMPERATURE (°C)
LT1182 • G20
CCFL High-Side Sense Null
Current vs Temperature
1.060
1.040
1.020
1.000
0.980
0.960
0.940
–75 – 50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
LT1182 • G23
Bulb Protect Servo Voltage
vs Temperature
7.5
7.4
7.3
7.2
I_CCFL = 100µA
7.1
7.0
6.9
I_CCFL = 50µA
6.8
6.7
6.6
I_CCFL = 10µA
6.5
–75 – 50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
LT1182 • G26
LCD V_C High Clamp Voltage
vs Temperature
2.4
2.3
2.2
2.1
2.0
1.9
1.8
1.7
–75 – 50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
LT1182 • G21
CCFL High-Side Sense Null Current
Line Regulation vs Temperature
0.160
0.140
0.120
0.100
0.080
0.060
0.040
0.020
0.000
–75 – 50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
LT1182 • G24
Bulb Input Bias Current
vs Temperature
10
8
6
4
2
0
–75 – 50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
LT1182 • G27
7