EN 61248-4-1997 电子和通信设备用变压器和电感器.第4部分:采用能力批准程序的开关电源变压器分规范 IEC 61248-4-1996
Transformers and Inductors for Use in Electronic and Telecommunication Equipment Part 4: Sectional Specification for Power Transformers for Switched Mode Power Supplies (SMPS) on the Basis of the Capability Approval Procedure