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MAX754CSE Datasheet(PDF) 10 Page - Maxim Integrated Products |
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MAX754CSE Datasheet(HTML) 10 Page - Maxim Integrated Products |
10 / 16 page CCFL Backlight and LCD Contrast Controllers 10 ______________________________________________________________________________________ PARAMETER SYMBOL MIN TYP MAX UNITS Strike Voltage (VS) VS,RMS 1100 1500 VRMS Discharging Tube Current (IL) ILAMP,RMS 0.001376 0.005 ARMS Discharging Tube Voltage (VL) VLAMP,RMS 435 VRMS Bias Voltage VLCD 16.3 32.6 V Output Current ILCD 0.0245 A T1 Turns Ratio (Sec/Pri) (Note 2) n 171 T1 Resonating Inductance (Note 2) LMAG 0.000045 H C9 Value (Note 3) CRES 2.2E-07 F C10 Value CBAL 1.5E-11 F Royer Frequency w 317820.86 rad/s Reference Voltage VREF 1.25 V Second Volts Constant sV 0.000008 2.4E-05 sV R8 Current-Sensing Resistor R8 555.36037 Ω Secondary Voltage Phase vs. Tube Voltage phi -1.1776341 Radian Secondary Limit Voltage VLIM 1350 VRMS T1 Center-Tap Limit Peak Voltage 11.164844 VPEAK R5/R6 ROTP,RATIO 0.1341944 Ω/Ω VIN(min) Full-Load Switching Period TFL 1.639E-06 s L2 Inductance L2 1.96E-05 2.4E-05 H L2 Peak Currrent 1.22704 A R4/R3 RLCD,RATIO 0.0398724 Ω/Ω Input Voltage VIN 5.978103 18 V Table 2. CCFL Circuit Design Example (Note 1) T1 Center-Tap Peak Voltage VTAP,PK 9.3903817 VPEAK Note 1: To perform your own calculations for the parameters given in Table 2 (Design Example), use the equations given in Table 3 (Design Equations). Note 2: T1 = Sumida’s EPS207 Note 3: C9 = Wima’s SMD 7.3 __/63 CCFL Specifications LCD Contrast Voltage Specifications Royer Specifications MAX754 Specifications CCFL Circuit Calculations LCD Circuit Calculations Application Circuit Operating Range |
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