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公开(公告)号：US10826375B2
公开(公告)日：2020-11-03
申请号：US16216611
申请日：2018-12-11
摘要： A controller for use in a power converter comprising a request control circuit coupled to receive a feedback signal representative of an output of the power converter. The request control circuit is coupled to generate a request signal for controlling a power switch. The request signal can include a synchronization signal in response to the feedback signal and a jitter average signal. The synchronization signal is generated by the request transmitter circuit and corresponds to an average on time for controlling the power switch.
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公开(公告)号：US10243442B1
公开(公告)日：2019-03-26
申请号：US15821479
申请日：2017-11-22
摘要： A controller for use in a power converter includes a secondary controller coupled to receive a feedback signal representative of an output of the power converter to generate d a request signal. A primary controller is coupled to receive the request signal to generate a primary drive signal. The primary drive signal is coupled to control switching of a power switch to control a transfer of energy from the input to the output of the power converter. A frequency to on-time converter included in the primary controller is coupled to receive the request signal. The frequency to on-time converter is coupled to control the duration of on-time pulses included in the primary drive signal in response to a period of the request signal.
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公开(公告)号：US20200119652A1
公开(公告)日：2020-04-16
申请号：US16535857
申请日：2019-08-08
摘要： A controller for use in a power converter includes a comparator configured to compare a sense signal representative of an amount of energy delivered to an output of the power converter, to a target value. An update clock generator configured to receive the sense signal and to generate a clock signal having a clock frequency in response to the sense signal. A request control coupled to the comparator and to the update clock generator, the request control configured to generate a request signal having a request frequency that is responsive to an output of the comparator and that controls an operational state of a power switch of the power converter. The request control further configured to update a rate at which the request frequency of the request signal is responsive to the clock frequency of the clock signal.
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公开(公告)号：US09722506B2
公开(公告)日：2017-08-01
申请号：US14859028
申请日：2015-09-18
CPC分类号： H02M7/04 , H02M1/42 , H02M1/4208 , H02M3/158 , H02M3/1582 , Y02B70/12 , Y02B70/126
摘要： A controller for a switched mode power converter includes limit-to-valley ratio circuitry, an on-time generator, and a drive circuit. The limit-to-valley ratio circuitry is coupled to generate a ratio signal in response to sensing a switch current of a switch that regulates an output of the switched mode power converter. The ratio signal is representative of a time ratio between a first length of time that the switch current is at or above a switch current limit and a second length of time that the switch current is at or below a switch current valley that is a portion of the switch current limit. The on-time generator is coupled to vary a switch on-time signal in response to receiving the ratio signal. The drive circuit is coupled to output a drive signal to a control terminal of the switch in response to receiving the switch on-time signal.
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公开(公告)号：US20170085191A1
公开(公告)日：2017-03-23
申请号：US14859028
申请日：2015-09-18
IPC分类号： H02M7/04
CPC分类号： H02M7/04 , H02M1/42 , H02M1/4208 , H02M3/158 , H02M3/1582 , Y02B70/12 , Y02B70/126
摘要： A controller for a switched mode power converter includes limit-to-valley ratio circuitry, an on-time generator, and a drive circuit. The limit-to-valley ratio circuitry is coupled to generate a ratio signal in response to sensing a switch current of a switch that regulates an output of the switched mode power converter. The ratio signal is representative of a time ratio between a first length of time that the switch current is at or above a switch current limit and a second length of time that the switch current is at or below a switch current valley that is a portion of the switch current limit. The on-time generator is coupled to vary a switch on-time signal in response to receiving the ratio signal. The drive circuit is coupled to output a drive signal to a control terminal of the switch in response to receiving the switch on-time signal.
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公开(公告)号：US20170040883A1
公开(公告)日：2017-02-09
申请号：US14818186
申请日：2015-08-04
发明人： Zongqi Hu , Tiziano Pastore , Peter Vaughan , Yury Gaknoki , Jose Requinton Del Carmen, JR. , Sundaresan Sundararaj
摘要： A switching circuit with reverse current prevention for use in a Buck converter includes a power switch coupled to a coupling node, which is an interconnection point of a power switch, an inductor and a freewheeling diode of the Buck converter. The inductor is coupled between the coupling node and an output of the Buck converter, and the freewheeling diode is coupled between coupling node and an output return of the Buck converter. A controller is coupled to receive a feedback signal to control switching of the power switch to regulate a transfer of energy from the input to the output of the Buck converter. A reverse current prevention circuit is coupled to detect a reverse current condition of the power switch to generate an inhibit signal to inhibit the power switch from receiving a drive signal to prevent a reverse current through the power switch.
摘要翻译： 具有用于降压转换器的反向电流防止的开关电路包括耦合到耦合节点的功率开关，耦合节点是Buck转换器的功率开关，电感器和续流二极管的互连点。 电感器耦合在耦合节点和降压转换器的输出端之间，续流二极管耦合在耦合节点和降压转换器的输出回路之间。 控制器被耦合以接收反馈信号以控制功率开关的切换以调节从输入到降压转换器的输出的能量传递。 耦合反向电流防止电路以检测电源开关的反向电流状态以产生禁止信号，以禁止电源开关接收驱动信号以防止通过电源开关的反向电流。
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公开(公告)号：US20210351685A1
公开(公告)日：2021-11-11
申请号：US16871522
申请日：2020-05-11
摘要： A controller comprising a regulation circuit and a frequency request circuit. The regulation circuit configured to receive a signal representative of an output and a reference representative of a desired value of the output, the regulation circuit configured to output a regulation signal in response to a difference between the signal and the reference. The frequency request circuit configured to receive the regulation signal and outputs an increment signal representative of a request to increase a switching frequency and a decrement signal representative of a request to decrease the switching frequency in response to the regulation signal. The frequency request circuit configured to assert the increment signal when the output is less than the desired value for a duration longer than a first period and assert the decrement signal when the output is greater than the desired value for a duration longer than a second period.
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公开(公告)号：US11043890B2
公开(公告)日：2021-06-22
申请号：US16260798
申请日：2019-01-29
摘要： A controller for use in a power converter includes a secondary controller coupled to receive a feedback signal representative of an output of the power converter to generate d a request signal. A primary controller is coupled to receive the request signal to generate a primary drive signal. The primary drive signal is coupled to control switching of a power switch to control a transfer of energy from the input to the output of the power converter. A frequency to on-time converter included in the primary controller is coupled to receive the request signal. The frequency to on-time converter is coupled to control the duration of on-time pulses included in the primary drive signal in response to a period of the request signal.
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9.发明授权公开(公告)号：US10903747B2
公开(公告)日：2021-01-26
申请号：US16683776
申请日：2019-11-14
摘要： A power conversion system includes a switch mode power converter including a switch coupled to regulate an output voltage to a regulation value in response to a feedback signal. A controller is coupled to deliver a gate drive signal to the switch during an enabled control condition. The controller is further coupled to inhibit the gate drive signal to the switch during an inhibited control condition. A duty cycle state machine included in controller is coupled to adjust a duty cycle of the gate drive signal according to a plurality of discrete duty cycle states.
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公开(公告)号：US20170070142A1
公开(公告)日：2017-03-09
申请号：US14846313
申请日：2015-09-04
IPC分类号： H02M3/157
摘要： A controller for use in a power converter includes a gate drive circuit coupled to generate a control signal to switch a power switch of the power converter. A zero current detection circuit is coupled to a multifunction pin coupled to receive a multifunction signal that is representative of an input voltage of the power converter when the power switch is on, and representative of an output voltage of the power converter when the power switch is off. The zero current detection circuit is coupled to generate a zero current detection signal. An overvoltage detection circuit is coupled to receive the multifunction signal and a state signal representative of a state of the power switch to generate in response to the state signal and the multifunction signal a line overvoltage signal and an output over voltage signal coupled to be received by the gate drive circuit.
摘要翻译： 用于功率转换器的控制器包括被连接以产生控制信号以切换功率转换器的电源开关的栅极驱动电路。 零电流检测电路耦合到多功能引脚，该多功能引脚被耦合以在电源开关接通时接收表示功率转换器的输入电压的多功能信号，并且当功率开关为功率开关时代表功率转换器的输出电压 关闭 零电流检测电路被耦合以产生零电流检测信号。 耦合过电压检测电路以接收多功能信号和代表功率开关状态的状态信号，以响应于状态信号和多功能信号产生线路过压信号和耦合的输出过电压信号，以被 门驱动电路。
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