| 发明名称 | Soft transition apparatus and method for switching power converters | ||
| 摘要 | An embodiment apparatus comprises a secondary synchronous rectifier and a secondary gate drive controller. The secondary gate drive controller coupled to a transformer winding comprises a secondary synchronous rectifier soft start signal generator configured to generate a plurality of soft start pulses, a pulse width modulation generator configured to generate a forward switch drive signal and a freewheeling switch drive signal based upon a signal across the transformer winding and a soft transition generator configured to generate a soft start freewheeling switch drive signal by gradually releasing the freewheeling switch drive signal during a soft start process. | ||
| 申请公布号 | US8908393(B2) | 申请公布日期 | 2014.12.09 |
| 申请号 | US201113280225 | 申请日期 | 2011.10.24 |
| 申请人 | Futurewei Technologies, Inc. | 发明人 | Ye Liming;Mao Hengchun;Liu Xujun |
| 分类号 | H02M3/335;H02M1/36 | 主分类号 | H02M3/335 |
| 代理机构 | Slater & Matsil, L.L.P. | 代理人 | Slater & Matsil, L.L.P. |
| 主权项 | 1. An apparatus comprising: a secondary synchronous rectifier coupled to a secondary side of a power converter comprising a forward switch and a freewheeling switch; and a secondary gate drive controller coupled to a transformer winding of the power converter comprising a secondary synchronous rectifier soft start signal generator configured to generate a plurality of soft start pulses;a pulse width modulation generator configured to generate a forward switch drive signal for the forward switch and a freewheeling switch drive signal for the freewheeling switching based upon a signal across the transformer winding; anda soft transition generator configured to generate a soft start freewheeling switch drive signal by gradually releasing the freewheeling switch drive signal during a soft start process. | ||
| 地址 | Plano TX US | ||