| 摘要 |
A controllable driver (1) is provided for driving a load. The controllable driver (1) comprises a primary converter (11) and a control circuit (13) isolated from one another by an opto-isolator (18). The controllable driver (11) is isolated from an output load (19) by a magnetically coupled pair of windings (112, 114); wherein said windings are adapted to provide a voltage supply to said output load. A feedback signal from the output load, indicative of a load current flowing in the second winding, is provided to the control circuit by a winding (12) isolated from the first and second windings (112, 114), such that the control circuit (13) remains isolated from the output load. The control circuit also directly receive input control signal without an opto- isolator. The control circuit is also isolated from the switching core (111) of the primary converter (11) via an opto-isolator. Such a controllable driver reduces the likelihood and impact of electromagnetic interference test failures and potential energy surges. |
