LT1182 LINER [Linear Technology], LT1182 Datasheet - Page 3

• Manufacturer Part Number: LT1182
• Description: CCFL/LCD Contrast Switching Regulators
• Manufacturer: LINER [Linear Technology]

ELECTRICAL CHARACTERISTICS
T
(LT1182/LT1183) LCD V
(LT1183/LT1184/LT1184F) REF = Open, unless otherwise specified.
SYMBOL
I
I
f
DC(MAX)
BV
I
V
V
Q
SHDN
LIM1
A
SAT1
REF
I
SW1
I
= 25 C, V
Q
PARAMETER
Supply Current
SHUTDOWN Supply Current
SHUTDOWN Input Bias Current
SHUTDOWN Threshold Voltage
Switching Frequency
Maximum Switch Duty Cycle
Switch Breakdown Voltage
Switch Leakage Current
I
CCFL V
CCFL V
CCFL V
CCFL V
CCFL V
CCFL High-Side Sense Servo Current
CCFL High-Side Sense Servo Current
Line Regulation
CCFL High-Side Sense Supply Current
Bulb Protect Servo Voltage
Bulb Input Bias Current
CCFL Switch Current Limit
CCFL Switch On-Resistance
Supply Current Increase During
CCFL Switch On-Time
Reference Voltage
Reference Output Impedance
CCFL
Input Programming Current
I
CCFL V
I
IN
CCFL
CCFL
= 5V, BAT = Royer = Bulb = 12V, I
Summing Voltage
Summing Voltage for
Programming Current
C
C
C
C
C
C
Offset Sink Current
to DIO Current Servo Ratio
Low Clamp Voltage
High Clamp Voltage
Switching Threshold
Source Current for
C
= 0.5V, LCD V
SW
= Open, (LT1182) FBN = FBP = GND, (LT1183) FB = GND,
CONDITIONS
I
V
I
LT1182/LT1183: 3V V
LT1184/LT1184F: 3V V
SHUTDOWN = 0V, CCFL V
SHUTDOWN = 0V, CCFL V
Measured at CCFL V
I
1V, (LT1183) FB = 1V, (LT1182/LT1183) LCD V
Measured at CCFL V
Measured at CCFL V
V
V
3V V
3V V
CCFL V
I
CCFL V
DIO = 5mA out of Pin, Measure I
I
CCFL V
I
BAT = 5V to 30V, I
I
Current Measured into BAT and Royer Pins
I
Servo Voltage Measured Between BAT and Bulb Pins
Duty Cycle = 50%
Duty Cycle = 75% (Note 3)
CCFL I
CCFL I
Measured at REF (Pin 11) on LT1183/LT1184/LT1184F
Measured at REF (Pin 11) on LT1183
Measured at REF (Pin 11) on LT1184/LT1184F
CCFL
CCFL
CCFL
CCFL
CCFL
VC
CCFL
CCFL
SW
SW
BAT
CCFL
= 0 A at CCFL V
= 12V, Measured at CCFL V
= 30V, Measured at CCFL V
– V
= 100 A, CCFL V
= 0 A to 100 A
= 25 A, 50 A, 75 A, 100 A,
= 100 A
= 100 A, I
= 100 A, I
= 100 A, I
SW
SW
IN
IN
C
C
SW
= SHUTDOWN = CCFL V
BULB
= 1.5V, Positive Current Measured into Pin
= 1.5V
= 1A
= 1A
DC = 0%
30V, Measured on LT1182/LT1183
30V, Measured on LT1184/LT1184F
= Bulb Protect Servo Voltage
VC
VC
VC
CCFL
= 0 A at CCFL V
= 0 A at CCFL V
= 0 A at CCFL V
C
SW
SW
SW
= 1.5V
C
= 100 A,
and LCD V
and LCD V
and LCD V
IN
= Open, (LT1182) FBN = FBP =
IN
C
C
LT1182/LT1183/LT1184/LT1184F
= LCD V
= LCD V
30V
30V
SW
SW
VC
SW
SW
SW
SW
C
C
C
at CCFL V
and LCD V
and LCD V
C
C
= 1.5V
= 1.5V,
= 1.5V
, I
= Open (Note 2)
= Open
= Open, DIO = GND, CCFL V
SW
= 50mA,
C
SW
SW
= 1.5V
C
= Open
0.425
0.385
1.224
1.214
0.41
0.37
4.70
0.93
1.25
MIN
175
160
0.6
1.7
0.6
6.5
0.9
80
75
60
–5
94
50
20
5
C
= 0.5V,
0.465
0.465
1.244
1.244
0.85
0.45
0.45
4.95
0.95
1.00
TYP
200
200
100
0.1
2.1
0.1
7.0
1.9
1.6
0.6
35
85
85
70
99
20
45
15
9
6
3
5
5
5
0.505
0.555
1.264
1.274
MAX
0.49
0.54
5.20
1.07
0.16
225
240
104
150
9.5
1.2
0.3
2.4
1.3
7.5
3.0
2.6
1.0
14
70
20
40
15
15
30
70
30
9
6
UNITS
A/mA
mA/A
A/ A
3
%/V
kHz
kHz
mA
mA
mV
%
%
A
A
V
V
A
A
V
V
V
V
A
V
V
V
A
A
V
A
A
A
V
V