Product category: Power Supply ICs and Controllers
News Release from: Maxim Integrated Products | Subject: MAX8759
Edited by the Electronicstalk Editorial Team on 18 November 2005
Controller drives fluorescents more
efficiently
An integrated inverter controller is designed to drive cold-cathode fluorescent lamps using a full-bridge resonant inverter for maximum efficiency.
Maxim Integrated Products has released the MAX8759, an integrated inverter controller designed to drive cold-cathode fluorescent lamps (CCFLs) using a full-bridge resonant inverter for maximum efficiency Input power is converted to light with high efficiency
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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The MAX8759 provides +/-2.5% accurate lamp-current regulation, adjustable with an external resistor, for superior CCFL inverter performance.
A 10:1 dimming range can be achieved by turning the CCFL on and off using a digital pulsewidth modulation (DPWM) method, while maintaining the lamp current constant.
The MAX8759 supports Intel display power-saving technology (DPST) to maximise battery life and includes two lamp-current feedback input pins that support dual-lamp applications with a minimum number of external components.
An internal 5.35V linear regulator powers most of the internal circuitry and the MOSFET driver, which directly drives four external n-channel power MOSFETs.
The resonant operation ensures reliable striking and provides near-sinusoidal waveforms over the entire 4.5 to 28V input range.
The MAX8759 is available in a space-saving (5 x 5mm), low-profile (0.8mm), 28-pin thin QFN package and operates over the -40 to +85C temperature range.
Prices start at $4.23 (1000-up, FOB USA).
A preassembled MAX8759 EV kit is available with recommended external components to reduce design time.
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