EVAL-STCH03-45W

EVAL-STCH03-45W Data brief 45W / 12V power supply based on STCH03 QR flyback controller and SRK1000B adaptive synchronous rectification controller Features • Input voltage range VIN: 90 VAC to 265 VAC • • • Output range: 12 V - 3.75 A continuous operation Very low stand-by power: < 40 mW @ 230 Vin Average full load efficiency: – > 88% @ 115 VIN – > 89% @ 230 VIN • Active mode at 10% load efficiency: – > 84% @ 115 VIN • Active mode at 10% load efficiency: > 84% @ 115 VIN > 82% @ 230 VIN • • • Safety: Acc. to EN60065 EMI: Acc. to EN55022 - Class B Small PCB form factor: 85 x 55 X 25 mm – > 82% @ 230 VIN Description Product status link EVAL-STCH03-45W The EVAL-STCH03-45W is a 45 W / 12 V isolated power supply developed for general purpose applications. The evaluation board implements a Quasi Resonant flyback converter based on the STCH03 controller with optocoupler feedback for voltage and primary side regulation for constant output current regulation. The secondary side rectification is based on the SRK1000B adaptive synchronous rectification controller. The efficiency of the application is very high over entire output power range thanks to the smart power management of the STCH03 and SRK1000B controllers, the STF10LN80K5 MDmesh K5 primary MOSFET and the STL90N10F7 Power MOSFET for the synchronous rectification. The evaluation board implements a robust output supply protected against output overvoltage, output undervoltage, output overpower and output short-circuit. The protections are auto-restart for a safe operation. DB3852 - Rev 3 - November 2019 For further information contact your local STMicroelectronics sales office. www.st.com EVAL-STCH03-45W Electrical schematic 1 Electrical schematic Figure 1. SCH-EVAL-STCH03-45W evaluation board schematic DB3852 - Rev 3 page 2/4 EVAL-STCH03-45W Revision history Table 1. Document revision history DB3852 - Rev 3 Date Version Changes 17-Apr-2019 1 Initial release. 08-Nov-2019 2 Primary MOSFET part number modified with the correct part numeber STF10LN80K5 14-Nov-2019 3 Minor changes page 3/4 EVAL-STCH03-45W 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. For additional information about ST trademarks, please refer to www.st.com/trademarks. 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. © 2019 STMicroelectronics – All rights reserved DB3852 - Rev 3 page 4/4