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參數(shù)資料
| 型號： | LT1184F |
| 廠商： | Linear Technology Corporation |
| 元件分類： | 基準電壓源/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 |
| 文件頁數(shù)： | 14/24頁 |
| 文件大?。?/td> | 330K |
| 代理商： | LT1184F |
14
LT1182/LT1183/LT1184/LT1184F
BLOCK DIAGRA
M
W
LT1184/LT1184F CCFL Regulator Top Level Block Diagram
COMP1
UNDER-
VOLTAGE
LOCKOUT
THERMAL
SHUTDOWN
2.4V
REGULATOR
SHUTDOWN
200kHz
OSC
SHUTDOWN 6
REF
I
CCFL
AGND
DIO
BULB
CCFL
V
C
CCFL
PGND
CCFL
V
SW
16
ROYER
13
BAT
14
V
IN
12
LOGIC 1
DRIVE 1
GAIN = 4.4
Q3
2
×
Q5
1
×
Q4
5
×
Q8
1
×
Q10
2
×
R1
0.125
R4
0.1
LT1184/LT1184F: REFERENCE IS BROUGHT OUT TO PIN 1.
PINS 7, 8, 9, 10 ARE NO CONNECT.
Q6
2
×
R3
1k
D2
6V
D1
Q11
Q1
Q7
9
×
Q9
3
×
11
2
5
3
15
4
1
V
1.24V
V1
0.465V
–
+
CCFL
0
μ
A TO
100
μ
A
–
+
g
m
–
+
I
AMP1
ANTI-
SAT1
1184 BD02
LT1184: HIGH-SIDE SENSE RESISTOR
R4 AND GM AMPLIFIER ARE REMOVED.
PIN 13 IS NO CONNECT.
APPLICATIO
S I
N
FOR
ATIO
U
W
U
Introduction
Current generation portable computers and instruments
use backlit Liquid Crystal Displays (LCDs). These displays
also appear in applications extending to medical equip-
ment, automobiles, gas pumps, and retail terminals. Cold
Cathode Fluorescent Lamps (CCFLs) provide the highest
available efficiency in backlighting the display. Providing
the most light out for the least amount of input power is the
most important goal. These lamps require high voltage AC
to operate, mandating an efficient high voltage DC/AC
converter. The lamps operate from DC, but migration
effects damage the lamp and shorten its lifetime. Lamp
drive should contain zero DC component. In addition to
good efficiency, the converter should deliver the lamp
drive in the form of a sine wave. This minimizes EMI and
RF emissions. Such emissions can interfere with other
devices and can also degrade overall operating efficiency.
Sinusoidal CCFL drive maximizes current-to-light conver-
sion in the lamp. The circuit should also permit lamp
intensity control from zero to full brightness with no
hysteresis or “pop-on”.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
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| LT1184FCS | 功能描述:IC SW REG CCFL CONTRAST 16-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標準包裝:43 系列:- 應用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應商設備封裝:48-QFN（7x7） 包裝:管件 |
| LT1184FCS#PBF | 功能描述:IC SW REG CCFL CONTRAST 16-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標準包裝:2,000 系列:- 應用:控制器，DSP 輸入電壓:4.5 V ~ 25 V 輸出數(shù):2 輸出電壓:最低可調至 1.2V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:30-TFSOP（0.173"，4.40mm 寬） 供應商設備封裝:30-TSSOP 包裝:帶卷 (TR) |
| LT1184FCS#PBF | 制造商:Linear Technology 功能描述:DC-DC CONVERTER BUCK 200KHZ 制造商:Linear Technology 功能描述:DC-DC CONVERTER, BUCK, 200KHZ, 1A, SOIC- |
| LT1184FCS#TR | 功能描述:IC REG SWITCH DUAL CCFL 16SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標準包裝:43 系列:- 應用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應商設備封裝:48-QFN（7x7） 包裝:管件 |
| LT1184FCS#TRPBF | 功能描述:IC SW REG CCFL CONTRAST 16-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 標準包裝:43 系列:- 應用:控制器，Intel VR11 輸入電壓:5 V ~ 12 V 輸出數(shù):1 輸出電壓:0.5 V ~ 1.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-VFQFN 裸露焊盤 供應商設備封裝:48-QFN（7x7） 包裝:管件 |
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