EE10-A1 is a 100K-200KHz low-power high-frequency transformer of 5-12V with maximum of 3W output and can be used as long-term stable supply. It is suitable for use with switching power management ICs such as the LNK364PN  and it is easy to design a 5-12V maximum output 3W switching power supply.
Primary inductance 2.6-4.0mH, turns ratio is 145:18.
Note: It is a switching power supply power transformer and can not be used directly with 220V 50Hz. Direct connection with 50Hz AC will burn the transformer.