High Brightness LED Systems 2009 - Intersil - #8

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Wide Dimming Range and High Driving Current Multi-Channel HBLED Drivers Device Device Description For LCD Size ISL97631 6 LEDs Driver with Integrated Schottky Diode with OVP 1.8” to 3.5” LCD Backlight ISL97632 White LED Driver with Digital Dimming 1.8” to 3.5” LCD Backlight ISL97634 White LED Driver with PWM Dimming 1.8” to 3.5” LCD Backlight ISL97635 SMBus 8-Channel LED Driver Up to 17” ISL97635A SMBus 6-Channel LED Driver Up to 17” Other Intersil Multi-Channel LED Drivers LC-076.0 Printed in USA 3/09 © 2009 Intersil Americas Inc. All Rights Reserved. The following are trademarks or registered trademarks of Intersil Americas Inc.: Intersil, Intersil logo, “i” and Design. All other trademarks are the property of the respective trademark owners. Intersil Corporation www.intersil.com North America 1-888-INTERSIL International (01) 321-724-7143 Wide Range of PWM Dimming Multi-Channel LED Drivers Device Device Description Topologies # of LEDs (max) For LCD Size IOUT (max) (mA) Peak Effi ciency (%) VIN (V) VOUT (max) (V) Dimming Control Package ISL97636 8-Channel LED Driver Inductor Boost 80 Up to 17” 280 91 6 to 24 34.5 PWM 24 Ld 4mmx 4mm QFN ISL97636A 6-Channel LED Driver Inductor Boost 60 Up to 17” 210 91 6 to 24 34.5 PWM 24 Ld 4mmx 4mm QFN VBL+ = 6V to 24V VOUT = 34.5V, 38mA per string ISL97636 PWMI/EN COMP VIN FAULT OVP PGND RSET VDC LX IIN0 IIN3 IIN2 IIN4 IIN5 LX PGND GND IIN1 IIN6 IIN7 Max Driving Current 38mA Per Channel Parallel-able multi-channel for higher current needs. 0 1 2 3 4 5 6 PWM Dimming Duty Cycle (%) ILED (mA) 200Hz (Dimming range 0% ~ 100%) 22kHz (Dimming range 10%~100%) 0 5 10 15 20 25 Wide range of PWM dimming allows low duty cycles of operation that extend battery life. PWM dimming up to 22kHz Avoids audible noise sensitive applications. .. .. .. 6V to 24V Input Support a wide range of battery and AC adaptors. Key Features Dynamic headroom control Highest VF string detection Saves power and reduces LED stress Full protection String open / short circuit detection OVP & OTP Optional output short circuit protection .. .. .. .. .. .. ..