Datasheet

6
LT1182/LT1183/LT1184/LT1184F
TYPICAL PERFORMANCE CHARACTERISTICS
U
W
I
CCFL
Summing Voltage
vs Temperature
TEMPERATURE (°C)
I
CCFL
SUMMING VOLTAGE (V)
0.53
0.52
0.51
0.50
0.49
0.48
0.47
0.46
0.45
0.44
0.43
0.42
0.41
0.40
0.39
0.38
–25 25 75 125
LT1182 • G10
175–50–75 0 50 100 150
V
IN
= 5V
V
IN
= 3V
V
IN
= 30V
∆CCFL V
C
Source Current for
∆I
CCFL
Programming Current
vs Temperature
CCFL V
C
to DIO Current Servo
Ratio vs Temperature
I
CCFL
PROGRAMMING CURRENT (µA)

5
4
3
2
1
0
–1
–2
–3
–4
–5
–6
–7
–8
–9
–10
40 80 120 160
LT1182 • G11
20020
0
60 100 140 180
T = –55°C
T = 25°C
T = 125°C
∆I
CCFL
SUMMING VOLTAGE (mV)
TEMPERATURE (°C)
–3
CCFL V
C
SINK OFFSET CURRENT (µA)
–1
1
0
–2
10
9
6
8
7
5
3
2
4
–75 125 150
–25 0–50
25 50
75 100
175
CCFL V
C
= 0.5V
CCFL V
C
= 1.0V
CCFL V
C
= 1.5V
LT1182 • G12
TEMPERATURE (°C)
0
POSITIVE DIO VOLTAGE (V)
0.4
0.2
0.8
0.6
1.2
1.0
–25 25 75 125
LT1182 • G14
175–50–75 0 50 100 150
I(DIO) = 1mA
I(DIO) = 5mA
I(DIO) = 10mA
Positive DIO Voltage
vs Temperature
Negative DIO Voltage
vs Temperature
CCFL V
C
High Clamp Voltage
vs Temperature
CCFL V
C
Low Clamp Voltage
vs Temperature
TEMPERATURE (°C)
0
CCFL V
C
LOW CLAMP VOLTAGE (V)
0.10
0.05
0.20
0.15
0.30
0.25
–25 25 75 125
LT1182 • G17
175–50–75 0 50 100 150
I
CCFL
Summing Voltage
Load Regulation
CCFL V
C
Offset Sink Current
vs Temperature
TEMPERATURE (°C)
–75
1.7
CCFL V
C
HIGH CLAMP VOLTAGE (V)
1.8
2.0
2.1
2.2
2.4
–50
50
100
LT1182 • G18
1.9
2.3
25
150
175
–25
0
75 125
TEMPERATURE (°C)
4.80
∆CCFL V
C
SOURCE CURRENT FOR 
∆I
CCFL
PROGRAMMING CURRENT (µA/µA)
4.90
4.85
5.00
4.95
5.10
5.05
–25 25 75 125
LT1182 • G13
175–50–75 0 50 100 150
I
CCFL
= 10µA
I
CCFL
= 50µA
I
CCFL
= 100µA
TEMPERATURE (°C)
–75
CCFL V
C
DIO CURRENT SERVO RATIO (µA/mA)
101
103
125
LT1182 • G16
99
97
95
–25
25
75
175
100
102
98
96
100
–50
0
50
150
I(DIO) = 1mA
I(DIO) = 5mA
I(DIO) = 10mA
TEMPERATURE (°C)
–75
NEGATIVE DIO VOLTAGE (V)
1.2
1.6
125
LT1182 • G15
0.8
0.4
0
–25
25
75
175
1.0
1.4
0.6
0.2
100
–50
0
50
150
I(DIO) = 1mA
I(DIO) = 5mA
I(DIO) = 10mA