H - Electricity – 02 – M
Patent
H - Electricity
02
M
H02M 3/155 (2006.01) H02M 5/293 (2006.01)
Patent
CA 2523177
The present invention relates to step-down controller having an input having a first and a second input terminal for the purpose of applying an input voltage (U e), an output having a first and a second output terminal at which an output voltage (U a) can be provided, a series circuit comprising a switch (S1) and an inductance (L T) which is coupled between the first input terminal and the first output terminal, the switch (S1) having a control input (St) for the purpose of applying a control signal, a first diode (D1) which is coupled between the junction point between the switch (S1) and the inductance (L T) and a reference potential such that, when the inductance (L T) is freewheeling, a current flow through the first diode (D1) is possible, it also comprising a snubber network which comprises a snubber capacitor (C ent), a second diode (D2), a third diode (D3) and an auxiliary inductance (L H), a series circuit comprising the snubber capacitor (C ent), the third diode (D3) and the auxiliary inductance (L H) being coupled in parallel with the inductance (L T), and the second diode (D2) being coupled with its first terminal to the reference potential and with its second terminal to the junction point between the snubber capacitor (C ent) and the third diode (D3), the second diode (D2) being polarized, as the first diode (D1), with respect to the reference potential, and the third diode (D3) being polarized with respect to the second diode (D2) such that a current flow through a series circuit comprising the second diode (D2) and the third diode (D3) is possible.
Huber Andreas
Niedermeier Peter
Reiter Bernhard
Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh
Smart & Biggar
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