STEVAL-ILL035V2 Multi-channel LED driver with integrated boost controller for medium/large LCD panel backlight based on LED7708 Data brief Description The STEVAL-ILL035V2 product evaluation board is an extension (daughterboard) of the STEVALILL035V1 (motherboard) based on the LED7708 LED driver. It allows implementation of a daisychained configuration for applications requiring more than 16 channels. The LED7708 is configured as slave on the STEVAL-ILL035V2, and as master on the STEVAL-ILL035V1. Features Wide DC input voltage: 10 V - 28 V 16-channels with up to 85 mA/channel current capability and independent PWM brightness control Up to 15 white LEDs per channel Embedded open-channel and LED short-circuit faults management Expansion connector to cascade other STEVAL-ILL035V2 evaluation boards RoHS compliant August 2014 The boost controller section is not used and the supply voltage for the LED strings is derived from the motherboard (STEVAL-ILL035V1, master) by extending the output voltage optimization through dedicated hand-shake signals. Additional daughterboards can be connected to a single motherboard to increase the number of channels. The brightness control of the LED strings and the fault management options are identical to the ones available for the STEVAL-ILL035V1 evaluation board. The evaluation board is intended as a solution for medium/large LCD panel backlight drivers, but is suitable for any application involving several LEDs arranged is strings (e.g. advertisement panels, signs, gaming, etc.). DocID026800 Rev 1 For further information contact your local STMicroelectronics sales office. 1/4 www.st.com ',1 ;)/7 *6&. *66< /5(1 '&/. /( ;)/7B:25 6: 73 73 7373 7373 &21$ &21 Q 96,B(;7 & 9,1 ,2. ;92. ;29) ;06. 9%2267 6: '$7$B/223 '&/. /( ;)/7 *6&. *66< /5(1 '287 73 96, 9&& 9,1 ,2. ;92. ;29) ;06. 9&& &21$ 96,B(;7 Q & 7+3 ;06. ;29) ;92. ,2. ;)/7 *6&. /( '&/. '287 ',1 *66< 96, 3 & X /('B94)31[B 67(9$/,//9 ,2. ;06. N ;)/7 ;29) &21 /( '&/. *6&. '287 5 ',1 96,B6(/ & X 8 73 *66< 73 9&& N 96, X & & Q ;92. )$8/7 6: X & 5 ' 96,B(;7 9,1 /5(1 Q & X 9)% - & X & /'2 )6: 6<1& 9,1 )26& /5(1 9'5 6/23( &203 ,6(7+ &/,0 *$7( 3*1' &616 ,6(7/ $*1' $*1' & X &+ &+ 90,1 6*1' 6: & 5 ,6(7/B6(/ DocID026800 Rev 1 &+ &+ 2/4 1& N &+ &+ &+ &+ &+ &+ &+ &+ &+ &+ &+ &+ 73 73 73 73 73 9&& N 73 5 73 73 73 73 73 73 73 73 73 73 675,3 &21 - - 1 9%2267 Schematic diagram STEVAL-ILL035V2 Schematic diagram Figure 1. STEVAL-ILL035V2 circuit schematic *63*6* STEVAL-ILL035V2 2 Revision history Revision history Table 1. Document revision history Date Revision 08-Aug-2014 1 Changes Initial release. DocID026800 Rev 1 3/4 4 STEVAL-ILL035V2 IMPORTANT NOTICE - PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries ("ST") reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST's terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers' products. No license, express or implied, to any intellectual property right is granted by ST herein. Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product. ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document. (c) 2014 STMicroelectronics - All rights reserved 4/4 DocID026800 Rev 1 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: STMicroelectronics: STEVAL-ILL035V2