STEVAL-ISA023V2 Flyback AC-DC converter evaluation board based on the VIPer53-E with 24 W negative output Data Brief Features ■ Input voltage, Vin: from 90 to 265 Vrms ■ Negative output voltage: -5 V,-12 V ■ Standby consumption: <1 W ■ Total output power: 24 W ■ EMI requirements: EN55022 Class B ■ Safety: EN 60950 Description STEVAL-ISA023V2 This is an ideal solution for a 25 W switch mode power supply (SMPS) dedicated to industrial or white-goods applications. The board accepts a wide range of input voltages (90 to 265 Vrms) and delivers 2 negative output voltages. The switchmode power supply(SMPS) is based on the VIPer53-E. The VIPer53-E combines an enhanced current-mode PWM controller with a high-voltage MDmesh™ Power MOSFET in the same package. The main characteristics of the evaluation board are its high efficiency and low standby consumption. These, combined with the minimal component count and global low cost approach, makes it an ideal solution for powering industrial or consumer equipment, while also meeting worldwide consumption requirements. December 2007 Rev 1 For further information contact your local STMicroelectronics sales office. 1/4 www.st.com 4 2 1 Input 85 - 265VAC 2 1 CON1 F1 2A t 100nF/275VAC/X2 C2 100nF/275VAC/X2 C1 R2 1M D1 R3 5.6k 68uF/400V C3 C4 6 2 39nF C5 NC OSC U1 VIPer 53DIP 5 D R1 1M VDD + - 15R 4.7nF/50V 7 TOVL 8 COMP 1 S S 150nF C6 R4 5.1k 4 3 RT1 STPS1150 C7 22uF/35V D2 C8 120pF STTH1R06 R5 7.5k Q1 BC807-40 D4 D5 1.5KE150A D3 BAR18 5 4 3 2.2nF/Y1 6 7 8 9 10 U2 PC817 + + 1k R14 D6 STPS1045D D7 STPS1045D + + D8 STPS2H100 4 3 C16 T1 1 2 C10 + + C9 470uF/25V 1000uF/25V 2/4 1000uF/25V C11 0.1uH L3 R7 220R R6 220R R9 0R R8 0R U3 TL431 C12 100nF R10 10k L2 R12 15k R11 15k + 3.3uH + + + C14 33uF/35V C13 470uF/25V U4 L78L33 Vin C17 470n GND Vout C18 100n Negative version only Positive version only R13 120R 9.1V D9 0 1 2 3 4 CON2 Figure 1. 100nF 1 C15 1 Board schematic STEVAL-ISA023V2 Board schematic Scheme L1 20mH/1A STEVAL-ISA023V2 2 Revision history Revision history Table 1. Document revision history Date Revision 03-Dec-2007 1 Changes Initial release. 3/4 STEVAL-ISA023V2 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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