STEVAL-ISA057V1 15 W wide range SMPS for metering based on the ESBTTM STC03DE220HV and L6565 PWM controller Data Brief Features Minimum input voltage: 125 VDC Maximum input voltage: 1250 VDC Output voltage: 5 V to 3.0 A Maximum output power: 15 W Short-circuit protection based on auto-restart feature Minimum switching frequency limited to 30 kHz Safety compliant according EN60950 Overall converter efficiency > 60% Not galvanic isolated solution used in most metering applications !-V STEVAL-ISA057V1 PCB type and size: - Material of PCB: FR4 - Double side layout - Total diameter of demonstration board 58 x 120 mm single package to reduce application complexity, EMI, price and increase reliability and performance. Description This demonstration board implements a 15 W flyback SMPS which is a very popular and much known topology in applications switch mode power supplies where the required output power is in the range of 5 W to 200 W. The converter is based on the L6565 PWM driver working in quasi resonant mode, it means zero voltage switching or at least switching in valley during turn-off phases and current mode primary control. Excellent wide voltage input range from 125 VDC to 1250 VDC with good efficiency. For this application is used an ESBTTM switch: STC03DE22HV. The ESBTTM is a cascade configuration of a high voltage BJT and a low voltage power MOSFET. STMicroelectronics optimizes performance of both devices and offers this kind of switch in one November 2008 Rev 1 For further information contact your local STMicroelectronics sales office. 1/4 www.st.com 4 FRQQHFWRU,1 - X) 9 & X) 9 & X) 9 & )XVH$ 5 5 N 5 0 5 0 5 N 5 N 5 0 5 0 5 N 5 N 5 0 5 0 5 N 5 N 5 & Q 5 N 4 %& 5 N 5 N 5 N 5 N 5 N ' 9 4 673' 5 N N 5 %$9 ' 5 5 5 5 ' &203 &6 8 / Q & 5 N 5 5 6736 %$9 ' 7 3-03 6 ! X)9 & & Q 287 9)) ) =&' 9&& ,19 2/4 *1' 7 & Q 5 N 5 5 VHFRQGDU\ ' & S /S P+ 1S1V X X S N 5 5 & & & 6736/ WUDQVIB(7'BB(*6721B 5 5 4 67&GHKY DX[ 3ULPDU\ 3ULPDU\ 5 N 5 N 5 N & Q 9$ *1' FRQQHFWRU287 - Figure 1. 1 9'& Circuit schematic STEVAL-ISA057V1 Circuit schematic Schematic !-V STEVAL-ISA057V1 2 Revision history Revision history Table 1. Document revision history Date Revision 12-Nov-2008 1 Changes Initial release. 3/4 STEVAL-ISA057V1 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. 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