发明名称 |
POWER SUPPLY AND METHOD FOR COMPENSATING LOW-FREQUENCY OUTPUT VOLTAGE RIPPLE THEREOF |
摘要 |
A power supply has a power factor correction (PFC) circuit and a DC to DC conversion circuit. A DC to DC controller of the DC to DC conversion circuit acquires zero-crossing information and load information from the PFC circuit through a communication protocol, and performs a low-frequency compensation on a control command using a table-mapping means, thereby resolving the issues of higher controller complexity, changes of entire response characteristics and cost increase in conventional compensation technique. |
申请公布号 |
US2016079868(A1) |
申请公布日期 |
2016.03.17 |
申请号 |
US201414567790 |
申请日期 |
2014.12.11 |
申请人 |
ACBEL POLYTECH INC. |
发明人 |
Yeh Chia-An |
分类号 |
H02M3/335;H02M1/14;H02M1/42 |
主分类号 |
H02M3/335 |
代理机构 |
|
代理人 |
|
主权项 |
1. A method for compensating low-frequency output voltage ripple of a power supply, wherein the power supply has a power factor correction (PFC) circuit and a DC (Direct Current) to DC conversion circuit, the DC to DC conversion circuit has a DC to DC controller performing the method, the method comprising steps of:
providing a mapping table with multiple compensation signals built in the DC to DC controller; continuously acquiring zero-crossing information of an AC (Alternating Current) power from the PFC circuit; determining if a zero-crossing of the AC input power is taking place according to the zero-crossing information; and selecting a corresponding compensation signal from the mapping table to compensate a control command when the zero-crossing of the AC input power is taking place. |
地址 |
New Taipei City TW |