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参数资料
| 型号： | LT1184 |
| 厂商： | Linear Technology Corporation |
| 元件分类： | 基准电压源/电流源 |
| 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： | 射频放大器 |
| 文件页数： | 14/24页 |
| 文件大小： | 330K |
| 代理商： | LT1184 |
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”.
相关PDF资料 |
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 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1184CS | 功能描述:IC SW REG CCFL CONTRAST 16-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| LT1184CS#PBF | 功能描述:IC SW REG CCFL CONTRAST 16-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| LT1184CS#TR | 功能描述:IC REG SWITCH DUAL CCFL 16SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| LT1184CS#TRPBF | 功能描述:IC SW REG CCFL CONTRAST 16-SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
| LT1184FCS | 功能描述:IC SW REG CCFL CONTRAST 16-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - 专用型 系列:- 标准包装:43 系列:- 应用:控制器，Intel VR11 输入电压:5 V ~ 12 V 输出数:1 输出电压:0.5 V ~ 1.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘 供应商设备封装:48-QFN（7x7） 包装:管件 |
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