SWITCHMODE=99 Power Supply Reference Manual ON Semiconductor Superb. ON Semiconductor SMPSRM/D Rev. 1, Sept-1999 _______________ Designing with the TL431. Excellent Means to use the capabilities of the TL431 to the full. Far more detailed explanations than are usually given. http://switchingpowermagazine.com/downloads/15%20Designing%20w= ith%20the%20TL431.pdf _______________________________________ November 2nd 2011 Some of these may require free =A0registration. TI Motor solutions guide 17 pages 2H 2011 =A0 =A0 =A0 =A0 =A0http://electronicdesign.com/portals/0/pdf/TI_MotorSoluti= onsGuide_oct2011.pdf TI Analog Signal Chain Guide 137 pages Hours of fascinating reading, for some. 1Q 2011 =A0 =A0 =A0 =A0 =A0 http://electronicdesign.com/Portals/0/TI_AnalogSignalCh= ainGuide_2011.pdf TI Audio Guide 44 pages =A0 =A0http://electronicdesign.com/Portals/0/TI_Wp_AudioGuide_Aug2011.pdf --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .