STEVAL-ISA134V1 12 V - 4 W, 115 kHz isolated flyback based on the VIPer06 Data brief Protection features available include thermal shutdown with hysteresis, delayed overload protection, and open loop failure protection (the latter available only if auxiliary winding is used). This flyback converter design is suitable for various applications, such as external adapter or as an auxiliary power supply in consumer equipment. Features AC main input voltage V : 85 V - 265 V IN AC AC Main frequency f : 50 Hz 60 Hz L Output voltage V : 12 V OUT Max output current I : 333 mA OUT Precision of output regulation V : 5% OUT LF High frequency output voltage ripple: V 50 mV OUT HF Min active mode efficiency AV = 71% Max ambient operating temperature: T = 60 C AMB Description The STEVAL-ISA134V1 demonstration board is a a 12 V - 4 W power supply in isolated flyback topology using the VIPer06, a new off-line high voltage converter by STMicroelectronics. The VIPer06 features an 800 V avalanche rugged power section, PWM operation at 115 kHz with frequency jittering for lower EMI, cycle-by-cycle current limit with adjustable set point, on-board soft-start and safe auto-restart after a fault condition. April 2013 DocID024565 Rev 1 1/4 For further information contact your local STMicroelectronics sales office. www.st.com 4Schematic diagram STEVAL-ISA134V1 1 Schematic diagram Figure 1. STEVAL-ISA134V1 circuit schematic 77 // 6 7 36 ++ // & , 1 + PP + + XX + && && && 55 NN XX )) 9 9 XX )) 9 9 SS )) 55 66 77 77 ++ // // && && + XX + %%7 7 ) =,= ), // XX )) 9 9 XX )) 99 ,, && 55 5 5 99(,, 33 ( 5+5 + NN 99 %% 55 5 ,, 11 N N && )) %% &7& 22 1 17/ 55 22 / QQ )) << && 22 00 33 55 % 006% 6 55 //0 ,, 0 ** 11 55 0 0 11 && ,, && && & & && && && 66+ )) + 77 55 )) XX 9 9 ) QQ) ) QQ ) QQ ) ) 55 ,, && 00 QQ )) N N & , 1 99 55 77 66 55 NN 2/4 DocID024565 Rev 1 5 9RXW 9RXW 36 67