参数资料
型号: MAX754ESE+T
厂商: Maxim Integrated
文件页数: 10/16页
文件大小: 0K
描述: IC CNTRLR CONTRAST 16-SOIC
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 2,500
显示器类型: CCFL - 冷色阴极荧光灯
电流 - 电源: 500µA
电源电压: 4 V ~ 30 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 16-SOIC(0.154",3.90mm 宽)
供应商设备封装: 16-SOIC
包装: 带卷 (TR)
CCFL Backlight and
LCD Contrast Controllers
Table 2. CCFL Circuit Design Example (Note 1)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
CCFL Specifications
Strike Voltage (V S )
Discharging Tube Current (I L )
Discharging Tube Voltage (V L )
V S,RMS
I LAMP,RMS
V LAMP,RMS
1100
0.001376
435
1500
0.005
V RMS
A RMS
V RMS
LCD Contrast Voltage Specifications
Bias Voltage
Output Current
V LCD
I LCD
16.3
0.0245
32.6
V
A
Royer Specifications
T1 Turns Ratio (Sec/Pri) (Note 2)
n
171
T1 Resonating Inductance (Note 2)
C9 Value (Note 3)
C10 Value
Royer Frequency
L MAG
C RES
C BAL
w
0.000045
2.2E-07
1.5E-11
317820.86
H
F
F
rad/s
MAX754 Specifications
Reference Voltage
V REF
1.25
V
Second Volts Constant
sV
0.000008
2.4E-05
sV
CCFL Circuit Calculations
R8 Current-Sensing Resistor
Secondary Voltage Phase vs. Tube Voltage
T1 Center-Tap Peak Voltage
Secondary Limit Voltage
T1 Center-Tap Limit Peak Voltage
R5/R6
R8
phi
V TAP,PK
V LIM
R OTP,RATIO
555.36037
-1.1776341
9.3903817
1350
11.164844
0.1341944
?
Radian
V PEAK
V RMS
V PEAK
? / ?
LCD Circuit Calculations
V IN(min) Full-Load Switching Period
T FL
1.639E-06
s
L2 Inductance
L2 Peak Currrent
R4/R3
L2
R LCD,RATIO
1.96E-05
0.0398724
2.4E-05
1.22704
H
A
? / ?
Application Circuit Operating Range
Input Voltage
V IN
5.978103
18
V
Note 1:
Note 2:
Note 3:
To perform your own calculations for the parameters given in Table 2 (Design Example), use the equations given in Table
3 (Design Equations).
T1 = Sumida’s EPS207
C9 = Wima’s SMD 7.3 __/63
10
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