发明名称 |
Inductive-energy-based auto-tuning DC-to-DC controller |
摘要 |
A method for controlling a pulse-modulated DC-to-DC converter includes: applying a control signal to a driver of an LC filter, the driver coupling power to inputs of the LC filter when the control signal is asserted and decoupling power when the control signal is de-asserted; monitoring an inductor current and an output voltage of the LC filter; calculating a goal current based at least in part on inductor energy needed to recharge an output capacitor in the LC filter; asserting the control signal when the goal current exceeds a threshold; and de-asserting the control signal when the inductor current reaches the goal current. An illustrative controller embodiment produces a trigger signal that sets a flip flop when the goal current exceeds the inductor current by more than a threshold amount; and resets the flip flop when the inductor current exceeds the goal current. |
申请公布号 |
US9564801(B1) |
申请公布日期 |
2017.02.07 |
申请号 |
US201514808708 |
申请日期 |
2015.07.24 |
申请人 |
SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC |
发明人 |
Harriman Paul J. |
分类号 |
H02M3/157;H02M3/04 |
主分类号 |
H02M3/157 |
代理机构 |
Iselin Law, PLLC |
代理人 |
Iselin Law, PLLC |
主权项 |
1. A method for controlling a pulse-modulated DC-to-DC converter, comprising:
applying a control signal to a driver of an LC filter, the driver coupling power to inputs of the LC filter when the control signal is asserted and decoupling power when the control signal is de-asserted; monitoring an inductor current and an output voltage of the LC filter; calculating a goal current based at least in part on inductor energy needed to recharge an output capacitor in the LC filter; asserting the control signal when the goal current exceeds the inductor current by more than a threshold amount; and de-asserting the control signal when the inductor current reaches the goal current. |
地址 |
Phoenix AZ US |