STEVAL-ISA182V1

STEVAL-ISA182V1 8.4 W / 30 W peak power offline flyback converter using VIPER38HD Data brief Description The STEVAL-ISA182V1 evaluation board implements an isolated flyback converter (12 V / 0.7 A) 8.4 W (30 W peak), US range 85 – 132 VAC, developed for metering. Features         US input range: 85 – 132 VAC, frequency: 50 – 60 Hz Output voltage / current: 12 V / 0.7 A (2.5 A peak) Very compact size Standby mains consumption: lower than 25 mW at 115 VAC Min. active mode efficiency: 81.14% Min. active mode at 10% load efficiency: 71.14% EMI: according to EN55022-Class-B RoHS compliant October 2016 The core of the application is the VIPER38HD, the latest offline converter from the VIPerPlus family. The device is a high-voltage converter that intelligently integrates an 800 V rugged power MOSFET with PWM current-mode control. The device features an adjustable extra power timer (EPT) that enables the IC to sustain overload conditions for a few seconds. The main characteristics of the evaluation board are its small size, minimal BoM, high efficiency and low standby consumption. Extremely low consumption under the no-load condition is ensured thanks to burst mode operation that reduces the average switching frequency and minimizes all frequency related losses. VIPER38HD operates at 115 kHz fixed frequency. Frequency jittering is implemented to help meet the standards regarding electromagnetic disturbance. The IC features high-level protections like dual-level OCP, output overvoltage, short-circuits and thermal shutdown with hysteresis. After the removal of a fault condition, the IC is automatically restarted. DocID029796 Rev 1 For further information contact your local STMicroelectronics sales office 1/4 www.st.com 2/4 DocID029796 Rev 1 AC IN 2A FS 1 2 320V RV 220nF C1 + 4 AC IN CM 20mH 3 D5 18V R5 220 BR 33uF C6 220pF C5 47nF C14 130k R3 D3 BAT41ZFILM 1mH BAT41ZFILM D4 C2 22uF R4 30k CONT EPT C3 22uF R6 47k D1 STTH1L06A C7 10nF FB SFH610A GND DRAIN OPTO IC1 VIPER38H BAT41ZFILM D2 CONTROL VDD C8 33nF 2.2M R2 4.7 220k 220pF R12 R1 C4 T1 2.2nF C13 OPTO SFH610A D6 STPS5H100B TS432 REF R7 1k C12 10nF R9 240k R8 150k C9 820uF 3.3uH L2 R11 15k R10 130k C10 220uF GND 1uF C11 12V-0.7A 1 - L1 Schematic diagram STEVAL-ISA182V1 Schematic diagram Figure 1: STEVAL-ISA182V1 circuit schematic GSPG190716 1120SG STEVAL-ISA182V1 2 Revision history Revision history Table 1: Document revision history Date Version 03-Oct-2016 1 Changes Initial release. DocID029796 Rev 1 3/4 STEVAL-ISA182V1 IMPORTANT NOTICE – PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’ products. No license, express or implied, to any intellectual property right is granted by ST herein. Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product. ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document. © 2016 STMicroelectronics – All rights reserved 4/4 DocID029796 Rev 1