參數(shù)資料
型號(hào)： LT1182
廠商： Linear Technology Corporation
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C
中文描述： 射頻放大器
文件頁(yè)數(shù)： 4/24頁(yè)
文件大小： 330K
代理商： LT1182
4
LT1182/LT1183/LT1184/LT1184F
ELECTRICAL CHARACTERISTICS
T
A
= 25
°
C, V
IN
= 5V, BAT = Royer = Bulb = 12V, I
CCFL
= SHUTDOWN = CCFL V
SW
= Open, DIO = GND, CCFL V
C
= 0.5V,
(LT1182/LT1183) LCD V
C
= 0.5V, LCD V
SW
= Open, (LT1182) FBN = FBP = GND, (LT1183) FB = GND,
(LT1183/LT1184/LT1184F) REF = Open, unless otherwise specified.
SYMBOL
PARAMETER
V
REF
– I
CCFL
Summing Voltage
CONDITIONS
Measured on LT1183
MIN
0.760
0.725
0.740
0.705
1.224
1.214
TYP
0.795
0.795
0.775
0.775
1.244
1.244
0.01
MAX
0.830
0.865
0.810
0.845
1.264
1.274
0.03
UNITS
V
V
V
V
V
V
G
V
REF
– I
CCFL
Summing Voltage
Measured on LT1184/LT1184F
G
REF1
LCD FBP/FB Reference Voltage
LT1182: Measured at FBP Pin, FBN = 1V, LCD V
C
= 0.8V
LT1183: Measured at FB Pin, LCD V
C
= 0.8V
3V
≤
V
IN
≤
30V, LCD V
C
= 0.8V
LT1182: FBP = REF1, FBN = 1V, LCD V
C
= 0.8V
LT1183: FB = REF1, LCD V
C
= 0.8V
LT1182: Measured at FBN Pin, FBP = 0V, LCD V
C
= 0.8V
LT1183: Measured at FB Pin, LCD V
C
= 0.8V
3V
≤
V
IN
≤
30V, LCD V
C
= 0.8V
LT1182: FBN = Offset Voltage, FBP = 0V, LCD V
C
= 0.8V
LT1183: FB = Offset Voltage, LCD V
C
= 0.8V
LT1182:
I
VC
=
±
25
μ
A, FBN = 1V
LT1183:
I
VC
=
±
25
μ
A
LT1182:
I
VC
=
±
25
μ
A, FBP = GND
LT1183:
I
VC
=
±
25
μ
A
LT1182: FBP = FBN = 1V or 0.25V,
LT1183: FB = 1V or 0.25V
LT1182: FBP = FBN = 1.5V or –0.25V,
LT1183: FB = 1.5V or –0.25V
LT1182: FBP = FBN = 1.5V, LT1183: FB = 1.5V
LT1182: FBP = FBN = 1V, LT1183: FB = 1V
LT1182: FBP = FBN = 1V, LT1183: FB = 1V, V
SW
DC = 0%
Duty Cycle = 50%
Duty Cycle = 75% (Note 3)
LCD I
SW
= 0.5A
LCD I
SW
= 0.5A
G
REF1 Voltage Line Regulation
FBP/FB Input Bias Current
G
%/V
G
0.35
–12
–12
0.01
1.0
–4
–1
0.2
μ
A
mV
mV
%/V
LCD FBN/FB Offset Voltage
–20
–27
G
Offset Voltage Line Regulation
FBN/FB Input Bias Current
G
G
–3.0
650
500
550
400
50
– 1.0
900
900
800
800
100
μ
A
g
m
FBP/FB to LCD V
C
Transconductance
1150
1300
1050
1200
175
μ
mhos
μ
mhos
μ
mhos
μ
mhos
G
FBN/FB to LCD V
C
Transconductance
G
LCD Error Amplifier Source Current
G
μ
A
LCD Error Amplifier Sink Current
G
35
100
175
μ
A
LCD V
C
Low Clamp Voltage
LCD V
C
High Clamp Voltage
LCD V
C
Switching Threshold
LCD Switch Current Limit
0.01
2.0
0.95
1.00
0.85
1.0
20
0.3
2.4
1.3
1.5
1.3
1.65
30
V
V
V
A
A
1.7
0.6
0.625
0.400
I
LIM2
G
G
V
SAT2
I
Q
I
SW2
LCD Switch On-Resistance
Supply Current Increase During
LCD Switch On-Time
Switch Minimum On-Time
G
mA/A
Measured at CCFL V
SW
and LCD V
SW
0.45
μ
s
The
G
denotes specifications which apply over the specified operating
temperature range.
Note 1:
T
J
is calculated from the ambient temperature T
A
and power
dissipation P
D
according to the following formula:
LT1182CS/LT1183CS/LT1184CS/LT1184FCS: T
J
= T
A
+ (P
D
×
100
°
C/W)
Note 2:
Does not include switch leakage.
Note 3:
For duty cycles (DC) between 50% and 75%, minimum
guaranteed switch current is given by I
LIM
= 1.4(1.393 – DC) for the CCFL
regulator and I
LIM
= 0.7(1.393 – DC ) for the LCD contrast regulator due to
internal slope compensation circuitry.
相關(guān)PDF資料
PDF描述
LT1183 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C
LT1184 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C
LT1184F 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C
LT1185CQ Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection
LT1185IQ Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection
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