半桥驱动器采用变压器还是全硅驱动.pdf

半桥驱动器： 采用变压器还是全硅驱动？ Half-Bridge Drivers A Transformer or an All-Silicon Drive? 议程Agenda • 使用半桥配置的拓扑结构Topologies using a half-bridge configuration • 软开关与硬开关的区别The difference between soft and hard-switching • 门驱动变压器The gate-drive transformer • 全硅方案 The all-silicon-solution • 比较 Comparison • 总结 Summary 2 议程Agenda • 使用半桥配置的拓扑结构Topologies using a half-bridge configuration • 软开关与硬开关的区别The difference between soft and hard-switching • 门驱动变压器The gate-drive transformer • 全硅方案 The all-silicon-solution • 比较 Comparison • 总结 Summary 3 高能效拓扑结构趋势 Topology Trend for High Efficiency • 硬开关Hard Switching • 软开关Soft Switching – 反激Flyback – LLC半桥谐振LLC-HB resonant – 正激Forward – 有源钳位正激Active clamp forward – 双开关反激2-sw flyback – 有源钳位反激Active clamp flyback – 双开关正激2-sw forward – 不对称半桥(AHB) Asymmetrical half-bridge – 全桥Full bridge – 相移全桥Full bridge with phase shift 有源钳位正激 Active clamp Forward 不对称半桥AHB 双电感加单电容半桥 有源钳位反激 LLC-HB Active clamp Flyback 相移全桥FB Phase-shift 4 高端开关The High-Side Switch • 要提供高能效，首选带零电压开关(ZVS)特性的拓扑结构To achieve high efficiency, the topologies with ZVS (Zero-Voltage Switching) behavior are preferred. • 所有软开关拓扑结构应用带浮点参考引