LT1619, Isolated SLIC flyback supply, VIN = 12V, VOUT = 32V and 65V (20W maximum)

Circuit shows LT1619, Isolated SLIC flyback supply, VIN = 12V, VOUT = 32V and 65V (20W maximum). Subscriber line interface circuit (SLIC) devices are used to provide telephone interface functions, they require negative power supplies for interface and ringing. Circuit satisfies these requirements by providing isolated 32.5V and 65V supplies from a 12V source