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Analog Circuit Design Volume Three by John Hamburger, Bob Dobkin

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Chapter 308

Floating CCFL with dual polarity contrast

Anthony Bonte

Abstract

The LT1182/LT1183/LT1184F/LT1184 family of dual fixed frequency, current mode switching regulators that provide the control function for cold cathode fluorescent lighting and liquid-crystal display contrast, are described.

Keywords

Switching regulator

cold cathode fluorescent lighting

LCD display contrast

LT1182

LT1183

LT1184F

LT1184

Current generation portable computers and instruments use backlit liquid-crystal displays (LCDs). Cold cathode fluorescent lamps (CCFLs) provide the highest available efficiency for backlighting the display. The lamp requires high voltage AC to operate, mandating an efficient, high voltage DC/AC converter. The LCD also requires ...

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