MAX754CSE データシートの表示（PDF） - Maxim Integrated
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MAX754CSE Datasheet PDF : 16 Pages
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CCFL Backlight and
LCD Contrast Controllers
Table 2. CCFL Circuit Design Example (Note 1)
PARAMETER
CCFL Specifications
Strike Voltage (VS)
Discharging Tube Current (IL)
Discharging Tube Voltage (VL)
LCD Contrast Voltage Specifications
Bias Voltage
Output Current
Royer Specifications
T1 Turns Ratio (Sec/Pri) (Note 2)
T1 Resonating Inductance (Note 2)
C9 Value (Note 3)
C10 Value
Royer Frequency
MAX754 Specifications
Reference Voltage
Second Volts Constant
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
LCD Circuit Calculations
VIN(min) Full-Load Switching Period
L2 Inductance
L2 Peak Currrent
R4/R3
Application Circuit Operating Range
Input Voltage
SYMBOL
VS,RMS
ILAMP,RMS
VLAMP,RMS
VLCD
ILCD
n
LMAG
CRES
CBAL
w
VREF
sV
R8
phi
VTAP,PK
VLIM
ROTP,RATIO
TFL
L2
RLCD,RATIO
VIN
MIN
1100
0.001376
16.3
0.0245
0.000008
1.96E-05
5.978103
TYP
435
171
0.000045
2.2E-07
1.5E-11
317820.86
1.25
555.36037
-1.1776341
9.3903817
1350
11.164844
0.1341944
1.639E-06
0.0398724
MAX
1500
0.005
32.6
UNITS
VRMS
ARMS
VRMS
V
A
2.4E-05
2.4E-05
1.22704
18
H
F
F
rad/s
V
sV
Ω
Radian
VPEAK
VRMS
VPEAK
Ω/Ω
s
H
A
Ω/Ω
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
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