Abstract: This design note shows how a 15V input flyback converter generates -185V at 50mA. The circuit uses the MAX668 step-up controller and a transformer to make a flyback converter. Maxim > App Notes > Amplifier and Comparator Circuits Automotive Power-Supply Circuits Keywords: step-up controller, input converter, transformer flyback, flyback converter Nov 01, 2000 APPLICATION NOTE 529 15V Input Converter Generates -185V at 50mA Abstract:This design note shows how a 15V input flyback converter generates -185V at 50mA. The circuit uses the MAX668 step-up controller and a transformer to make a flyback converter. Additional information: Data sheet for the MAX668 Data sheet for the MAX4130 Technical support: power Figure 1. This circuit uses the MAX668 and a transformer (which will need about a one-to-six turns ratio) to make a flyback converter. The op amp inverts the……