|
|
Article: LIER circuit helps power-supply efficiency. (leakage-inductance, energy-recovery)
- Article from:
- EDN
- Article date:
- February 16, 1995
- Author:
CopyrightCOPYRIGHT 1995 Reed Business Information, Inc. (US). This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
|
In high-frequency, high-power, low-input-voltage, flyback-converter power supplies, parasitic effects become overwhelmingly problematic. The flyback inductor's required primary inductance, for example, can become so low that its accompanying leakage inductance becomes a significant fraction of the total inductance. The energy stored in the primary leakage inductance lowers the circuit's efficiency and increases the power-rating requirements for the primary-winding switching device.
The leakage-inductance, energy-recovery (LIER) circuit in Fig 1 recovers energy stored in the primary leakage inductance and delivers the recovered energy to one of the power supply's ...