Converter having low loss snubber
地域：
New Taipei
摘要
The present application is a converter having a low loss snubber. The low loss snubber of the converter includes a clamping winding, a first capacitor, and a second capacitor. The clamping winding is magnetically coupled with a primary winding of a transformer of the converter. The primary winding to a secondary winding of the transformer leakage inductance energy is recovered by storing the energy in the second capacitor. When the second capacitor is discharging, the energy in the second capacitor may be further transferred to the first capacitor. When the first capacitor is discharging, energy in the first capacitor may be further returned to the power source. Therefore, the energy in the first capacitor and the energy in the second capacitor may not be consumed by a resistor, and power consumption of the low loss snubber may be decreased.
說(shuō)明書(shū)
When the flyback converter is operated under a continuous conduction mode, the voltage across the first capacitor C1 Vc1 is calculated by
When a voltage of the anode of the third diode D3 is greater than a voltage of the cathode of the third diode D3, the third diode D3 may be forward biasing. Therefore, the second capacitor C2 may discharge to output a current Ic2 to charge the first capacitor C1 through the third diode D3, and the first inductor L1 and the second capacitor C2 may resonate.
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