MP1026 ccfl driver for handheld disp lay applications MP1026 rev. 1.6w www.monolithicpower.com 1 8/25/2005 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2005 mps. all rights reserved. the future of analog ic technology tm tm description the MP1026 is a power ic that offers a complete solution for driving a cold cathode fluorescent lamp (ccfl). this power ic converts unregulated dc voltage to a nearly pure sine wave required to ignite and operate the ccfl. the MP1026 greatly increases power conversion efficiency and supports both analog and burst mode dimming, simplifying the module implementation. the MP1026 offers the following distinct performance advantages: ? more light for less power ? small board implementation ? low rf emission ? low external components cost the MP1026 is suitable for 2-cell li-ion battery applications using 5v, 9v, or 12v adapters as the power source. features ? 4.5v to 14v power input (v batt ) ? increase transformer reliability ? open lamp timer and regulation ? current and voltage feedback control ? logic level burst mode control ? supports open/short lamp protection ? soft-start ? outputs are short circuit protected ? allows burst-mode operation ? improved line transient response ? tightened lamp current accuracy applications ? portable dvd players ? pdas ? camcorders ? digital cameras ?mps? and ?monolithic power system s? are trademarks of monolithic power systems, inc. the MP1026 is covered by us patents 6,316,881 and 6,114,814. typical application rlfb cs1 t1 cs2 cisb csfb rsfb risb cp rdamp MP1026 agnd isfb vlfb ft comp cft cdbr cvdd cbal cbosc ccomp vdd batt outr pgnd btr abrt il bosc dbrt en vdd batt outl pgnd btl 20 19 18 17 16 15 14 13 12 11 1 2 3 4 5 6 7 8 9 10 cbtr cbar rbosc r il rs cbtl d a d a , d b : required for v batt < 7v in4148 or bat54 rbleed rdbr dbrt en abrt v dd cba v batt gnd f1 MP1026_tac_s01 d b
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