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www.austriamicrosystems.com (ptr) revision 1.0 1 - 2 product brief AS3665 9 channel advanced command driven rgb/white led driver 1 general description the AS3665 is a capacitive low noise charge pump with 9 current sources. the c harge pump automatically switches between 1:1 and 1:1. 5 modes. the connected current sources have a very low voltage compliance to improve efficiency of the whole system. three current sources have the possibility to operate either from vbat or vcp (especially useful for red leds). the internal control is done by command based pattern generators implemented by three sequencers. these commands are optimized for lighting applications (e.g. ramp up brightness logarithmically). it includes high level commands like conditionals jumps and variables. any of the three sequencers can be dynamically mapped to any of the 9 pwm generators for the leds. the AS3665 supports an audio input and sophisticated light patterns can be controlle d by internal digital filters. the AS3665 is controlled by i 2 c mode. synchronization over several AS3665 is possible by the trig pin. the AS3665 is available in a space-saving wl-csp-25 (2.5x2.5mm) 0.5mm pitch and operates over the -30oc to +85oc temperature range. figure 1. typical operating circuit 2 key features high efficiency capacitive 150ma charge pump with 1:1, 1:1.5 and 1:2 mo des with automatic mode switching; 1:2 mode can be disabled 9 channel high side 20ma current sources - less than 50mv at 10ma dropout voltage - led7,8,9 either powered by vbat or vcp advanced command bas ed pattern generator - 96 x 16 bits program memory - dedicated lighting commands like logarithmic fade - programming control and conditional jumps audio controlled lighting with internal digital filters 3 sequencers - dynamically mapped to 9 pwm generators - internal/external synchronization 9 pwm generators (12 bit resolution) - automatic rgb color correction by t amb i 2 c interface with dedicated en pin available in wl-csp-25 (2.5x2.5mm) 0.5mm pitch 3 applications rgb/white fun or event led for mobile phones or por- table devices; lighting management unit

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www.austriamicrosystems.com revision 1.0 2 - 2 AS3665 product brief copyrights copyright ? 1997-200 9, austriamicrosystems ag, schloss premstaett en, 8141 unterpremstae tten, austria-europe. trademarks registered ?. all rights reserved. the materi al herein may not be reprodu ced, adapted, merged, trans- lated, stored, or used witho ut the prior written consent of the copyright owner. all products and companies mentioned are trademarks or registered trademarks of their respective companies. disclaimer devices sold by austriamicrosystems ag are covered by t he warranty and patent indemni fication provisions appearing in its term of sale. austriamicrosystems ag makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from pa tent infringement. austriami- crosystems ag reserves the right to chang e specifications and prices at any ti me and without notice . therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems ag for current information. this product is intended for use in normal commercial a pplications. applications requiring extended temperature range, unusual environmental requirements, or high reliability app lications, such as military, medical life-support or life- sustaining equipment are specifically not recommended wit hout additional processing by austriamicrosystems ag for each application. for shipments of less than 100 parts the m anufacturing flow might show deviations from the standard production flow, such as test flow or test location. the information furnished here by austriamicrosystems ag is believed to be correct and accurate. however, austriamicrosystems ag shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or ar ising out of the furnishing, performance or use of the tech- nical data herein. no obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems ag rendering of technical or other services. contact information headquarters austriamicrosystems ag a-8141 schloss premstaetten, austria tel: +43 (0) 3136 500 0 fax: +43 (0) 3136 525 01 for sales offices, distributors a nd representatives, please visit: http://www.austriamicrosystems.com/contact

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