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參數資料
| 型號： | LT1184 |
| 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： | 1/24頁 |
| 文件大小： | 330K |
| 代理商： | LT1184 |
1
LT1182/LT1183/LT1184/LT1184F
CCFL/LCD Contrast
Switching Regulators
I
Wide Input Voltage Range: 3V to 30V
I
Low Quiescent Current
I
High Switching Frequency: 200kHz
I
CCFL Switch: 1.25A, LCD Switch: 625mA
I
Grounded or Floating Lamp Configurations
I
Open-Lamp Protection
I
Positive or Negative Contrast Capability
APPLICATIO
S
U
FEATURES
DESCRIPTIO
N
U
The LT
1182/LT1183 are dual current mode switching
regulators that provide the control function for Cold Cath-
ode Fluorescent Lighting (CCFL) and Liquid Crystal Display
(LCD) Contrast. The LT1184/LT1184F provide only the
CCFL function. The ICs include high current, high efficiency
switches, an oscillator, a reference, output drive logic,
control blocks and protection circuitry. The LT1182 per-
mits positive or negative voltage LCD contrast operation.
The LT1183 permits unipolar contrast operation and pins
out an internal reference. The LT1182/LT1183 support
grounded and floating lamp configurations. The LT1184F
supports grounded and floating lamp configurations. The
LT1184 supports only grounded lamp configurations. The
I
Notebook and Palmtop Computers
I
Portable Instruments
I
Automotive Displays
I
Retail Terminals
90% Efficient Floating CCFL Configuration with Dual Polarity LCD Contrast
TYPICAL APPLICATIO
N
U
, LTC and LT are registered trademarks of Linear Technology Corporation.
C12
2.2
μ
F
35V
BAT
8V TO 28V
POSCON
NEGCON
1182/3 TA01
EITHER NEGCON OR POSCON
MUST BE GROUNDED.
GROUNDING NEGCON GIVES
VARIABLE POSITIVE CONTRAST
FROM 10V TO 30V.
GROUNDING POSCON GIVES
VARIABLE NEGATIVE CONTRAST
FROM –10V TO –30V.
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
I
CCFL
DIO
CCFL V
C
AGND
SHDN
LCD V
C
CCFL V
SW
BULB
BAT
ROYER
V
IN
FBP
FBN
LCD V
SW
CCFL
PGND
LCD
PGND
LT1182
LAMP
UP TO 6mA
10
6
L1
L3
R1
750
L2
100
μ
H
3
2
+
1
5
4
+
+
+
ALUMINUM ELECTROLYTIC IS RECOMMENDED FOR C3B WITH AN
ESR
≥
0.5
TO PREVENT DAMAGE TO THE LT1182 HIGH-SIDE
SENSE RESISTOR DUE TO SURGE CURRENTS AT TURN-ON.
Q1, Q2 = ZETEX ZTX849 OR ROHM 2SC5001
L1 = COILTRONICS CTX210605
L2 = COILTRONICS CTX100-4
L3 = COILTRONICS CTX02-12403
*
DO NOT SUBSTITUTE COMPONENTS
COILTRONICS (407) 241-7876
0
μ
A TO 45
μ
A ICCFL
CURRENT GIVES
0mA TO 6mA
BULB CURRENT.
THIS IS EQUAL TO
0% TO 90% DUTY
CYCLE FOR THE
PWM SIGNAL.
C7, 1
μ
F
C1*
0.068
μ
F
D1
1N5818
D2
1N914
D4
1N914
V (PWM)
0V TO 5V
1kHz PWM
SHUTDOWN
C8, 0.68
μ
F
R7, 10K
C5
1000pF
R2
220k
R3
100k
C3A
2.2
μ
F
35V
C11
22
μ
F
35V
R13
8.45k
1%
R14
1.21k
1%
5V
R10, 10k, 1%
R9, 4.99k, 1%
C4
2.2
μ
F
V
≥
3V
D3
1N5934A
24V
C3B
2.2
μ
F
35V
C2
27pF
3kV
Q2*
Q1*
N = 1:2
R12
20k
R5, 43.2k, 1%
C6
2.2
μ
F
R4
46.4k
1%
+
D5
BAT85
C10
0.01
μ
F
R11, 20k, 1%
C9, 0.01
μ
F
2
4
6
9
+
CCFL BACKLIGHT APPLICATION CIRCUITS CONTAINED IN THIS
DATA SHEET ARE COVERED BY U.S. PATENT NUMBER 5408162
AND OTHER PATENTS PENDING
相關PDF資料 |
PDF描述 |
|---|---|
| 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 |
| LT1185C | Cap-Free, NMOS, 150mA Low Dropout Regulator with Reverse Current Protection |
| LT1185CT | 9-Bit Odd/Even Parity Generators/Checkers 14-SOIC 0 to 70 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LT1184CS | 功能描述:IC SW REG CCFL CONTRAST 16-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩壓器 - 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: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 |
| LT1184CS#PBF | 功能描述:IC SW REG CCFL CONTRAST 16-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - 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: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 |
| LT1184CS#TR | 功能描述:IC REG SWITCH DUAL CCFL 16SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩壓器 - 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: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 |
| LT1184CS#TRPBF | 功能描述:IC SW REG CCFL CONTRAST 16-SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - 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: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 | 功能描述:IC SW REG CCFL CONTRAST 16-SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩壓器 - 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: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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