一个高效率的包装变压器隔离的直流-直流转换器,使用玻璃基的风扇外晶圆级包装
Lin Cheng1, Zuohuan Chen2, Daquan Yu2
1School of Microelectronics, University of Science and Technology of China, Hefei 230026, China.
Fundamental research
|December 30, 2024
概括
一种新型的包装式变压器 (TiP) DC-DC转换器利用先进的晶圆级包装来降低成本和改进形式因素. 这一创新提高了紧型电子设备的功率密度和效率.
科学领域:
- 电气工程 电气工程
- 材料科学 材料科学 材料科学
- 半导体包装 半导体包装
背景情况:
- 由于离散组件集成,传统的直流-直流转换器往往面临尺寸,成本和效率方面的限制.
- 将磁性组件 (如变压器) 集成到半导体组件中,对小型化构成了重大挑战.
研究的目的:
- 提出和演示一个包装变压器 (TiP) 隔离的直流-直流转换器.
- 为集成变压器和互连制造利用风扇外晶片级包装 (FOWLP).
- 为了实现成本,形状因素,功率密度和效率的显著改进.
主要方法:
- 开发一个TiP转换器,使用基于玻璃的FOWLP与三层再分配层 (RDLs) 集成变压器和互连.
- 使用0.18μm生物极性CMOSDMOS (BCD) 工艺制造发射器 (TX) 和接收器 (RX) 芯片.
- 整合TX和RX模具成一个紧的5毫米×5毫米包装.
主要成果:
- 集成变压器实现了高质量 (Q) 和合 (k) 因素,提高了变压器的效率.
- 转换器在0.3W输出功率下显示了46.5%的峰值效率.
- 实现了1.25W的最大输送功率和50mW/mm2.2的最大功率密度.
结论:
- 提议的TiP直流直流转换器有效地将变压器集成到FOWLP中,从而减少组件数量和成本.
- 该解决方案在形状因子和功率密度方面提供了显著的改进,适用于空间有限的应用.
- 高性能集成变压器可提高微型功率转换系统的效率.
相关概念视频
Energy Losses in Transformers
799
In an ideal transformer, it is assumed that there are no energy losses, and, hence, all the power at the primary winding is transferred to the secondary winding. However, in reality, the transformers always have some energy losses, and, hence, the output power obtained at the secondary winding is less than the input power at the primary winding due to energy losses.
There are four main reasons for energy losses in transformers.
The first cause can be the high resistance of the...
There are four main reasons for energy losses in transformers.
The first cause can be the high resistance of the...
799
Fast Decoupled and DC Powerflow
120
The fast decoupled power flow method addresses contingencies in power system operations, such as generator outages or transmission line failures. This method provides quick power flow solutions, essential for real-time system adjustments. Fast decoupled power flow algorithms simplify the Jacobian matrix by neglecting certain elements, leading to two sets of decoupled equations:
120
Three-Winding Transformers
167
Three identical single-phase transformers can be configured to form a three-phase transformer connection, which involves high-voltage and low-voltage windings. The high-voltage windings are denoted by capital letters A-B-C, while the low-voltage windings are labeled with lowercase letters a-b-c, representing their respective phases. This notation helps distinguish between the high and low voltage sides of the transformer.
In the per-unit equivalent circuit of a grounded Y-Y three-phase...
In the per-unit equivalent circuit of a grounded Y-Y three-phase...
167
Equivalent Circuits for Practical Transformers
358
The practical equivalent circuits of single-phase two-winding transformers exhibit significant deviations from their idealized versions due to the inherent properties of winding resistance and finite core permeability. These properties result in real and reactive power losses, affecting the transformer's performance. Understanding these deviations is crucial for designing more efficient transformers.
In a practical transformer, each winding exhibits resistance and leakage reactance. The...
In a practical transformer, each winding exhibits resistance and leakage reactance. The...
358
Reducing Line Loss
129
In a three-phase circuit, line loss is an indicator of energy dissipated as heat due to the resistance of transmission lines. To address this, incorporating transformers into the system—a step-up transformer at the source and a step-down transformer at the load—is a strategic solution. Two three-phase transformers are introduced to improve this.
With a step-up transformer at the source, the voltage is increased, thereby reducing the current in the transmission lines since power loss...
With a step-up transformer at the source, the voltage is increased, thereby reducing the current in the transmission lines since power loss...
129
Power Factor Correction
142
The power transmission to a factory involves the transfer of apparent power, a combination of active and reactive power. The power factor measures how effectively electrical power is converted into useful work output. The ratio of the real power (KW) that does the work to the apparent power (KVA) supplied to the circuit.
142


