STEVAL-ISA060V1 6 W single output SMPS demonstration board based on the VIPER17 Data Brief Features ■ Input voltage range Vin: 90 VRMS to 265 VRMS ■ Output voltage Vout: 12 V ■ Max output current Iout: 500 mA ■ Precision of output regulation ∆Vout_LF: ±5% ■ High frequency output voltage ripple ∆Vout_LF: 50 mV Description STEVAL-ISA060V1 This demonstration board is based on the new VIPER17 device and implements a standard single-output isolated flyback converter operating at fixed frequency that can be 115 kHz or 60 kHz. Moreover internal thermal shutdown and an 800 V avalanche rugged power MOSFET improve the robustness of all the system. The VIPER17 device integrates in the same package two components: an advanced PWM controller with built-in BCD6 technology and an 800 V avalanche rugged vertical power MOSFET. If brownout and overvoltage protection are not necessary, the number of external components is further reduced. It is very suitable for offline power conversion operating either with wide range input voltage (85 VAC - 270 VAC) up to 6 W or with single range input voltage (85 VAC - 132 VAC or 175 VAC - 265 VAC). With European range input voltage (175 VAC - 265 VAC) the device can handle up to 10 W of output power. The proposed solution has the advantage of using few external components compared to a discrete solution, providing several protections and very low standby consumption in no-load condition. The protections present on the device such as overload and output overvoltage protections, secondary winding short-circuit protection, hard transformer saturation and brownout protections improve the reliability and safety of the design. The frequency jittering, that is inside implemented, helps to meet the standards regarding electromagnetic disturbance. February 2009 Rev 1 For further information contact your local STMicroelectronics sales office. 1/4 www.st.com 4 J1 BR1 BR 3 X2 F1 2 500mA FUSE C1 4 1 CON2 1 2 t 3 22uF 25V C4 J3 1600k R2 1600k R4 1 JUMPER 10 Ohm NTC NTC1 NT C1 10uF 450V T2 1 3 4 2 22k R5 2 68k R3 10nF C12 C1 C3 3 5 U1 N.M N. C5 CONT 1.8nF 1.8n C6 STTH1L06 VDD VD VIPER17HN VIPER17H 10 R1 D5 P6KE250 BAT46 D1 FB CONTRO CONT ROL BROWN OUT OU 220k R14 R1 1N4148 D2 10uF 450V 450 33k R12 R1 33nF C7 SOURCE DRAIN DRA IN 7 2 1 4 T1 8 9 6 7 PC81 PC817 OPTO OP TO1 C8 Y1 1 1.8nF 1.8n TRANSF TR ANSFOR ORME MER D3 5 ZL 470uF 25V 25 C9 C10 C1 4.7 uH u 330k R10 R1 15n 15nF C11 C1 1k R6 25 YK 47uF 25V L1 TL431 3 VR1 VR 1k R13 R1 STPS2H100 D4 4 3 C2 2 4 8 1 1 2 2/4 1 R9 18k 1% CON2 2 1 J2 68k 1% R8 12V 500mA 500m Figure 1. 2 1 1 2 Circuit schematic STEVAL-ISA060V1 Circuit schematic Schematic STEVAL-ISA060V1 2 Revision history Revision history Table 1. Document revision history Date Revision 09-Feb-2009 1 Changes Initial release. 3/4 STEVAL-ISA060V1 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. 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