| 发明名称 |
Controller with leakage current protection of a diode and operation method thereof |
| 摘要 |
A controller with leakage current protection of a diode includes a comparison unit, a reference voltage generation unit, a time out signal generation unit, and a gate signal generation unit, wherein the diode is applied to a secondary side of a power converter. The comparison unit outputs a corresponding selection signal according to a compensation voltage and a threshold. The reference voltage generation unit outputs a corresponding reference voltage range according to the corresponding selection signal. The time out signal generation unit determines a corresponding time out according to the corresponding selection signal, and generates a corresponding time out signal when a voltage corresponding to an auxiliary winding has no peak to cross an upper limit of the corresponding reference voltage range during the corresponding time out. The gate signal generation unit enters the leakage current protection or a quasi-resonant mode according to the corresponding time out signal. |
| 申请公布号 |
US9621055(B2) |
申请公布日期 |
2017.04.11 |
| 申请号 |
US201514841683 |
申请日期 |
2015.08.31 |
| 申请人 |
Leadtrend Technology Corp. |
发明人 |
Tsai Yi-Chuan |
| 分类号 |
H02M3/335;H02M7/757;H02M1/32;H02M1/00 |
主分类号 |
H02M3/335 |
| 代理机构 |
|
代理人 |
Hsu Winston;Margo Scott |
| 主权项 |
1. A controller with leakage current protection of a diode, wherein the diode is applied to a secondary side of a power converter, the controller comprising:
a comparison unit for receiving a compensation voltage, and outputting a corresponding selection signal according to the compensation voltage and a threshold; a reference voltage generation unit for outputting a corresponding reference voltage range according to the corresponding selection signal; a time out signal generation unit for determining a corresponding time out according to the corresponding selection signal, and generating a corresponding time out signal when a voltage corresponding to an auxiliary winding of the power converter has no peak to cross an upper limit of the corresponding reference voltage range during the corresponding time out; and a gate signal generation unit for entering the leakage current protection or a quasi-resonant mode according to the corresponding time out signal. |
| 地址 |
Hsinchu County TW |
