ML4877CR MICRO-LINEAR [Micro Linear Corporation], ML4877CR Datasheet
ML4877CR
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ML4877CR Summary of contents
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GENERAL DESCRIPTION The ML4877 is an ideal solution for driving multiple cold cathode fluorescent tubes (CCFL) used in liquid crystal display (LCD) backlight applications. It provides dimming ballast control for the LCD display. By utilizing differential drive the ML4877 can ...
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ML4877 PIN CONFIGURATION PIN DESCRIPTION PIN NAME FUNCTION 1 LEA+ Positive input for lamp error amp 2 AZR Connection to gate of external FET for high voltage regulator. Internally a zener diode to ground CAP Connection of optional ...
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ABSOLUTE MAXIMUM RATINGS Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. Supply Current (I ) ............................................... 75mA CC Output Current, ...
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ML4877 ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER DELAY TIMER Delay Time HIGH VOLTAGE INVERTER Oscillator Nominal Frequency Discharge Current Peak Voltage Valley Voltage Output Drivers Output High - L GATE 1, 2 Output Low - L GATE 1, 2 Rise & Fall ...
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ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER BIAS VDD Supply Current VDD Supply Current VREF Load Regulation VREF Output Voltage VREF Line Regulation VREF Line, Load, Temp Note 1: Limits are guaranteed by 100% testing, sampling, or correlation with worst case test conditions. ...
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ML4877 5 TO 18V IN *OPTIONAL SEE NOTE AZR VDD 2 13 HVDD LINEAR 12 REGULATOR VREF MASTER 5 BIAS & UVLO C3 1.0µF ON/OFF PGND GND Figure ...
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FUNCTIONAL DESCRIPTION The ML4877 consists of a PWM regulator, a lamp driver/ inverter, a linear regulator and control circuits. This IC, in conjunction with external components, converts a DC battery voltage into the high voltage and high frequency AC signal ...
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ML4877 FUNCTIONAL DESCRIPTION oscillator frequency versus the value of RT for different values Of CT. This nomograph may be used to select the appropriate value of RT and CT to achieve the desired oscillator frequency for the ML4877. LINEAR REGULATOR ...
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J1 1 GND DIMMING IRF7416 C20 C24 0.1µF 220µF C22 220µF R18 R15 200 1k C23 1nF C21 1nF R14 Q6 1k 2N3904 R13 Q5 10k 2N3904 1 C19 2 4.7nF 3 4 ...
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ML4877 Figure 6. 30W CCFL Inverter Board Lamps 10 ...
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... ORDERING INFORMATION PART NUMBER ML4877CR (END OF LIFE) ML4877ER (OBSOLETE) © Micro Linear 1998 registered trademark of Micro Linear Corporation. All other trademarks are the property of their respective owners. Products described herein may be covered by one or more of the following U.S. patents: 4,897,611; 4,964,026; 5,027,116; 5,281,862; 5,283,483; 5,418,502; ...